Modula MT XE build

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  • sdl2112
    Senior Member
    • Mar 2006
    • 571

    Modula MT XE build

    Here's my version of the Modula MT XE. After doing the Troels Jenzen project for my brother, I wanted something new for me. I have a longer term project in mind but it will likely take over a year to complete so I wanted something sooner...what better project than the MT XE considering I already have the tweeter/waveguide figured out.

    I'm starting with the PE 0.75 cu ft curved cabinet in piano black with a custom baffle. This is an all out sort of project...I don't think too overboard, though I do have a few things up my sleeve. You will just have to stay tuned in to find out :B

    This first pic shows the PE cabinet, I was very impressed :T The time it saved me...priceless! I plan to modify it for better damping...details to follow.
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    Preparing for port and connection cutouts
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    Done...one nervous step out of the way
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  • sdl2112
    Senior Member
    • Mar 2006
    • 571

    #2
    Baffle construction

    Since the PE cabinets use magnetic grills, so will I. I placed magnets in the baffles to line up with the grills.

    For the baffle I'm using 1 inch bamboo ply mated with 12mm Baltic birch, the birch provided the same inset depth as the PE baffle.

    Cutting the bamboo ply to size
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    Marking the placement for the magnets
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    Trial magnet fit on a scrap piece
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    Gluing the bamboo/birch
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    Comment

    • sdl2112
      Senior Member
      • Mar 2006
      • 571

      #3
      Baffle construction continued

      Now on to the speaker cutouts...it's amazing how many operations this takes 8O Although wood screws would work fine in the bamboo/birch, the perfectionist in me wanted inserts. It allows more hardware options for driver mounting.

      Marking the driver cutouts
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      Cutouts done, centering for mounting hardware
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      Rear woofer chamfer and insert clearance
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      Insert installation...really turned out nice...
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      Comment

      • JonMarsh
        Mad Max Moderator
        • Aug 2000
        • 15259

        #4
        Nice work! The PE cabs are well made for the price, but still just a starting point- a lot of stuff left to do in addition.

        Suspect I will enjoy watching this build unfold. I'm looking at revisiting this with some new drivers for Mini-monitors for the music room and for GF's bedroom. Gotta see if I can get one more pair of Anarchy woofers...
        the AudioWorx
        Natalie P
        M8ta
        Modula Neo DCC
        Modula MT XE
        Modula Xtreme
        Isiris
        Wavecor Ardent

        SMJ
        Minerva Monitor
        Calliope
        Ardent D

        In Development...
        Isiris Mk II updates- in final test stage!
        Obi-Wan
        Saint-Saëns Symphonique/AKA SMJ-40
        Modula PWB
        Calliope CC Supreme
        Natalie P Ultra
        Natalie P Supreme
        Janus BP1 Sub


        Resistance is not futile, it is Volts divided by Amperes...
        Just ask Mr. Ohm....

        Comment

        • jim1961
          Senior Member
          • Nov 2012
          • 357

          #5
          Nice work as always Scott.

          Going to have a Modula vs Gemini shootout at some point?
          Seek out and destroy early high gain room reflections

          Comment

          • sdl2112
            Senior Member
            • Mar 2006
            • 571

            #6
            Originally posted by JonMarsh
            Nice work! The PE cabs are well made for the price, but still just a starting point- a lot of stuff left to do in addition.

            Suspect I will enjoy watching this build unfold. I'm looking at revisiting this with some new drivers for Mini-monitors for the music room and for GF's bedroom. Gotta see if I can get one more pair of Anarchy woofers...
            Those do look like nice woofers...I'm guessing you've seen the news about the resurrection of this woofer but just in case you haven't...

            Want a second or third opinion about your speaker cabinet design or other audio related problem? Post your question or comment on the Technical Discussion Board. Hundreds of technicians, engineers, and hobbyists, nationwide read and discuss electronics related questions each week. We welcome your participation



            Good luck!

            Comment

            • sdl2112
              Senior Member
              • Mar 2006
              • 571

              #7
              Originally posted by jim1961
              Nice work as always Scott.

              Going to have a Modula vs Gemini shootout at some point?
              Well...I hope it's not too much of a shootout. I hope the Modula's win out easily

              Comment

              • dar47
                Senior Member
                • Nov 2008
                • 873

                #8
                Nice work so far.
                I'm glad your going for that hard baffle. Your going to really love this speaker it has crazy value and I still love mine. I just added a better pre-amp in the system and more detail came out. The MK2's will not hold you back.

                So tell Jim to bring it on.

                Comment

                • sdl2112
                  Senior Member
                  • Mar 2006
                  • 571

                  #9
                  Originally posted by dar47
                  Nice work so far.
                  I'm glad your going for that hard baffle. Your going to really love this speaker it has crazy value and I still love mine. I just added a better pre-amp in the system and more detail came out. The MK2's will not hold you back.

                  So tell Jim to bring it on.
                  Thanks!...I've always admired how you did your integrated waveguide in the baffle. Glad to see you still love yours...that gives me more incentive to finish faster. I hope to have some waveguide details this weekend. btw...the Gemini's are my speakers so the shootout will not be much of a rivalry

                  Comment

                  • ---k---
                    Ultra Senior Member
                    • Nov 2005
                    • 5202

                    #10
                    Beautiful construction so far. Looking forward to seeing the completion.
                    - Ryan

                    CJD Ochocinco! ND140/BC25SC06 MTM & TM
                    CJD Khanspires - A Dayton RS28/RS150/RS225 WMTMW
                    CJD Khancenter - A Dayton RS28/RS150/RS180 WTMW Center

                    Comment

                    • sdl2112
                      Senior Member
                      • Mar 2006
                      • 571

                      #11
                      Crossover

                      I worked on the crossovers this week ...actually got more done than expected...

                      I screwed the crossover boards to Baltic birch rails that I glued to the cabinet.

                      This is how I removed the wire varnish.
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                      Crossover assembly
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                      Placement in cabinet
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                      Several beers later...soldered and complete :T
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                      Comment

                      • jim1961
                        Senior Member
                        • Nov 2012
                        • 357

                        #12
                        My goodness. All that for a 2-way? Your crossovers are so pretty, a 30"x40" blowup picture on a wall might be kinda arty :B

                        I remember back in the day, the entire crossover was sometimes a single cap on the tweeter and that was it.

                        On a personal note, I rewired my passive pre-amp with KCAG One meter paired lengths of that stuff is up to $600 now :E
                        Seek out and destroy early high gain room reflections

                        Comment

                        • JonMarsh
                          Mad Max Moderator
                          • Aug 2000
                          • 15259

                          #13
                          Nice looking work! You're really moving along at a brisk clip! :T Clean looking crossover boards!
                          the AudioWorx
                          Natalie P
                          M8ta
                          Modula Neo DCC
                          Modula MT XE
                          Modula Xtreme
                          Isiris
                          Wavecor Ardent

                          SMJ
                          Minerva Monitor
                          Calliope
                          Ardent D

                          In Development...
                          Isiris Mk II updates- in final test stage!
                          Obi-Wan
                          Saint-Saëns Symphonique/AKA SMJ-40
                          Modula PWB
                          Calliope CC Supreme
                          Natalie P Ultra
                          Natalie P Supreme
                          Janus BP1 Sub


                          Resistance is not futile, it is Volts divided by Amperes...
                          Just ask Mr. Ohm....

                          Comment

                          • wkhanna
                            Grumpy Old Super Moderator Emeritus
                            • Jan 2006
                            • 5673

                            #14
                            Agreed!
                            These are going to be some Premium 2-ways!
                            I especially like how he works well with beer. :T :^x
                            _


                            Bill

                            Practicing Curmudgeon & Audio Snob
                            ....just an "ON" switch, Please!

                            FinleyAudio

                            Comment

                            • sdl2112
                              Senior Member
                              • Mar 2006
                              • 571

                              #15
                              Originally posted by jim1961
                              My goodness. All that for a 2-way? Your crossovers are so pretty, a 30"x40" blowup picture on a wall might be kinda arty :B

                              I remember back in the day, the entire crossover was sometimes a single cap on the tweeter and that was it.

                              On a personal note, I rewired my passive pre-amp with KCAG One meter paired lengths of that stuff is up to $600 now :E
                              Yes...I like the pretty colors. Jon did say this was the perfectionist version

                              Comment

                              • sdl2112
                                Senior Member
                                • Mar 2006
                                • 571

                                #16
                                Originally posted by JonMarsh
                                Nice looking work! You're really moving along at a brisk clip! :T Clean looking crossover boards!
                                Thanks! It kind of gets obsessive once you get going...I still have a lot to do including modifying the stands. I should have an update later today.

                                Comment

                                • sdl2112
                                  Senior Member
                                  • Mar 2006
                                  • 571

                                  #17
                                  Originally posted by wkhanna
                                  Agreed!
                                  These are going to be some Premium 2-ways!
                                  I especially like how he works well with beer. :T :^x
                                  Yea...that reminds me to double check my connections :roll:

                                  Comment

                                  • sdl2112
                                    Senior Member
                                    • Mar 2006
                                    • 571

                                    #18
                                    Waveguide construction

                                    I worked on adapting a waveguide to the D2608 tweeter a while back. I tried to create a smooth interface at the throat of the waveguide. I tried the H-65 but ultimately went with the Jantzen guide. I ended up using those guides elsewhere so I needed to modify a new one. I also created a new adapter to mate the diameter of the tweeter to the waveguide opening. It just so happened that a PVC reducer worked perfect :T

                                    Not sure anyone would want to go through the trouble of doing this but here's how I did it...

                                    I first milled out the tweeter faceplate to create a level surface and reduce the gap. I also milled the Jantzen guide base to remove about a 1mm step.

                                    Milling the Jantzen base
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                                    Creating the waveguide adapter from a PVC reducer
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                                    Preparing for assembly
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                                    Finished pair :T
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                                    Comment

                                    • J-Dub
                                      Senior Member
                                      • Jan 2006
                                      • 165

                                      #19
                                      Awesome build!
                                      Cant wait to see the results!
                                      "The most successful people in this world have also failed the most"

                                      Comment

                                      • JonMarsh
                                        Mad Max Moderator
                                        • Aug 2000
                                        • 15259

                                        #20
                                        Originally posted by sdl2112
                                        I worked on adapting a waveguide to the D2608 tweeter a while back. I tried to create a smooth interface at the throat of the waveguide. I tried the H-65 but ultimately went with the Jantzen guide. I ended up using those guides elsewhere so I needed to modify a new one. I also created a new adapter to mate the diameter of the tweeter to the waveguide opening. It just so happened that a PVC reducer worked perfect :T

                                        Not sure anyone would want to go through the trouble of doing this but here's how I did it...

                                        I first milled out the tweeter faceplate to create a level surface and reduce the gap. I also milled the Jantzen guide base to remove about a 1mm step.

                                        Milling the Jantzen base
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                                        Creating the waveguide adapter from a PVC reducer
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                                        Preparing for assembly
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                                        Finished pair :T
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                                        Slick... we should append this info to the original build thread! I'm looking at doing a similar build again, this is a help.
                                        Last edited by theSven; 01 May 2023, 21:25 Monday. Reason: Update quote
                                        the AudioWorx
                                        Natalie P
                                        M8ta
                                        Modula Neo DCC
                                        Modula MT XE
                                        Modula Xtreme
                                        Isiris
                                        Wavecor Ardent

                                        SMJ
                                        Minerva Monitor
                                        Calliope
                                        Ardent D

                                        In Development...
                                        Isiris Mk II updates- in final test stage!
                                        Obi-Wan
                                        Saint-Saëns Symphonique/AKA SMJ-40
                                        Modula PWB
                                        Calliope CC Supreme
                                        Natalie P Ultra
                                        Natalie P Supreme
                                        Janus BP1 Sub


                                        Resistance is not futile, it is Volts divided by Amperes...
                                        Just ask Mr. Ohm....

                                        Comment

                                        • dar47
                                          Senior Member
                                          • Nov 2008
                                          • 873

                                          #21
                                          That white PVC rim makes the tweet look like a spy camera hidden in some bamboo. 8O

                                          This could be a good thing, mine look so small next to all the wood and Jon's just disappear in the black wave guide.

                                          I like those clamping bars, where did you get them?

                                          Comment

                                          • sdl2112
                                            Senior Member
                                            • Mar 2006
                                            • 571

                                            #22
                                            Originally posted by dar47
                                            That white PVC rim makes the tweet look like a spy camera hidden in some bamboo. 8O

                                            This could be a good thing, mine look so small next to all the wood and Jon's just disappear in the black wave guide.

                                            I like those clamping bars, where did you get them?
                                            Yes the waveguide makes the tweeter look sooo much bigger

                                            The clamps are from Woodpeckers...I think they were on special...

                                            Premium woodworking tools, router bits, clamping, layout, drilling, sawing, measuring and turning tools to make your workshop more productive and fun.

                                            Comment

                                            • sdl2112
                                              Senior Member
                                              • Mar 2006
                                              • 571

                                              #23
                                              Originally posted by JonMarsh
                                              Slick... we should append this info to the original build thread! I'm looking at doing a similar build again, this is a help.
                                              I do like the Jantzen waveguide...it is very solid and inert. There are interesting alternatives with great results...makes my solution look too complicated :W

                                              Comment

                                              • jlaakso
                                                Junior Member
                                                • Sep 2012
                                                • 7

                                                #24
                                                Originally posted by sdl2112
                                                I do like the Jantzen waveguide...it is very solid and inert.
                                                I have my waveguides from the same material (POM) and there is no going back to molded plastic waveguides. Too flimsy after handling 1lbs waveguides

                                                Comment

                                                • sdl2112
                                                  Senior Member
                                                  • Mar 2006
                                                  • 571

                                                  #25
                                                  Originally posted by jlaakso
                                                  I have my waveguides from the same material (POM) and there is no going back to molded plastic waveguides. Too flimsy after handling 1lbs waveguides
                                                  Yes, I completely agree :T

                                                  Comment

                                                  • sdl2112
                                                    Senior Member
                                                    • Mar 2006
                                                    • 571

                                                    #26
                                                    Cabinet damping

                                                    The PE cabinets are well constructed but I wanted to improve the panel damping. I thought...what better way than lead sheet I wasn't sure how I was going to install it but it turned out quite well. I went with 1/8" sheet, any thicker would have been very difficult to cut and mold.

                                                    I tried three different adhesives before applying it to the cabinets. I haven't liked polyurethane glues in the past so I tried two water based Loctite adhesives in addition to the PL polyurethane. The PL specifically mentions lead bonding, it worked well and that is what I used. I usually prefer the water based products because of cleanup...I'll use the Polyseamseal to attach the wool felt to the inside of the cabinet.

                                                    Here's the adhesive test
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                                                    Cutting the lead sheet to size...a little time consuming 8O
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                                                    Applying it to the cabinet
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                                                    Installed pic 1
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                                                    Installed pic 2
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                                                    In total the lead should add about 18 lbs per cabinet...:T

                                                    Comment

                                                    • sdl2112
                                                      Senior Member
                                                      • Mar 2006
                                                      • 571

                                                      #27
                                                      Tip of the day

                                                      I had concerns to the proximity of the lead sheet to the air-core inductor. I have seen nonferrous materials used as shields before so I performed a little test. I placed the 3.3mh inductor atop a lead sheet sample (To the sides it virtually had no effect, only when placed in the center). It reduced the measured inductance to about two-thirds its value. The flux from the coil will produce eddy-currents that produce an opposing flux to that produced by the coil, thus reducing the inductance. On the other hand if a ferrous material were placed in the center of the coil the inductance would increase.

                                                      I also tried aluminum with the same results so anyone making aluminum cabinets...take note

                                                      Here's the testing
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                                                      Comment

                                                      • JonMarsh
                                                        Mad Max Moderator
                                                        • Aug 2000
                                                        • 15259

                                                        #28
                                                        Yeah, it's important to keep inductors away from large sheet conductors, of any done of material, for exactly the reasons you mention! BTW, where did you get your lead sheet?
                                                        the AudioWorx
                                                        Natalie P
                                                        M8ta
                                                        Modula Neo DCC
                                                        Modula MT XE
                                                        Modula Xtreme
                                                        Isiris
                                                        Wavecor Ardent

                                                        SMJ
                                                        Minerva Monitor
                                                        Calliope
                                                        Ardent D

                                                        In Development...
                                                        Isiris Mk II updates- in final test stage!
                                                        Obi-Wan
                                                        Saint-Saëns Symphonique/AKA SMJ-40
                                                        Modula PWB
                                                        Calliope CC Supreme
                                                        Natalie P Ultra
                                                        Natalie P Supreme
                                                        Janus BP1 Sub


                                                        Resistance is not futile, it is Volts divided by Amperes...
                                                        Just ask Mr. Ohm....

                                                        Comment

                                                        • sdl2112
                                                          Senior Member
                                                          • Mar 2006
                                                          • 571

                                                          #29
                                                          Originally posted by JonMarsh
                                                          Yeah, it's important to keep inductors away from large sheet conductors, of any done of material, for exactly the reasons you mention! BTW, where did you get your lead sheet?
                                                          I purchased the lead from http://www.zipmetals.com/Sheet-Lead-_c_1.html. The 1/8" x 12" x 48" sheets were $60.50 each a couple weeks ago now I see it's already up to $89 8O...still a lot cheaper than McMaster.

                                                          Comment

                                                          • sdl2112
                                                            Senior Member
                                                            • Mar 2006
                                                            • 571

                                                            #30
                                                            Progress...

                                                            With the long weekend...I have some progress.

                                                            More cabinet damping....exciting...right!

                                                            In addition to the lead sheet, I also added some Cascade VB-3
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                                                            Then some F13 felt
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                                                            Additional bracing
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                                                            Baffle support
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                                                            Comment

                                                            • sdl2112
                                                              Senior Member
                                                              • Mar 2006
                                                              • 571

                                                              #31
                                                              Stand modification

                                                              My speaker stands have a small mounting surface which works well for my Gemini's but I need something bigger for the Modula MT's. I traced the outline of the PE cabinet and used a template guide on my router.

                                                              pic 1
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                                                              pic 2
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                                                              pic 3
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                                                              Comment

                                                              • sdl2112
                                                                Senior Member
                                                                • Mar 2006
                                                                • 571

                                                                #32
                                                                Finishing

                                                                I applied one coat Seal-A-Cell, two coats gloss and one coat satin Arm-R-Seal. Installed the crossovers...getting pretty close :W

                                                                Sanded ready for finish
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                                                                Last coat waiting to dry
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                                                                Crossovers installed
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                                                                Comment

                                                                • jim1961
                                                                  Senior Member
                                                                  • Nov 2012
                                                                  • 357

                                                                  #33
                                                                  Have you listened to them yet?
                                                                  Seek out and destroy early high gain room reflections

                                                                  Comment

                                                                  • sdl2112
                                                                    Senior Member
                                                                    • Mar 2006
                                                                    • 571

                                                                    #34
                                                                    Not yet...I'll probably glue them up today. Actually I'm a little burned out...this is all I've done this weekend.

                                                                    Comment

                                                                    • jim1961
                                                                      Senior Member
                                                                      • Nov 2012
                                                                      • 357

                                                                      #35
                                                                      Originally posted by sdl2112
                                                                      Not yet...I'll probably glue them up today. Actually I'm a little burned out...this is all I've done this weekend.
                                                                      Sounds like the part that burned you out is about over. Soon you can just enjoy
                                                                      Seek out and destroy early high gain room reflections

                                                                      Comment

                                                                      • JonMarsh
                                                                        Mad Max Moderator
                                                                        • Aug 2000
                                                                        • 15259

                                                                        #36
                                                                        Originally posted by sdl2112
                                                                        Not yet...I'll probably glue them up today. Actually I'm a little burned out...this is all I've done this weekend.
                                                                        Lucky you, even though burned out! Looking very good! :T
                                                                        the AudioWorx
                                                                        Natalie P
                                                                        M8ta
                                                                        Modula Neo DCC
                                                                        Modula MT XE
                                                                        Modula Xtreme
                                                                        Isiris
                                                                        Wavecor Ardent

                                                                        SMJ
                                                                        Minerva Monitor
                                                                        Calliope
                                                                        Ardent D

                                                                        In Development...
                                                                        Isiris Mk II updates- in final test stage!
                                                                        Obi-Wan
                                                                        Saint-Saëns Symphonique/AKA SMJ-40
                                                                        Modula PWB
                                                                        Calliope CC Supreme
                                                                        Natalie P Ultra
                                                                        Natalie P Supreme
                                                                        Janus BP1 Sub


                                                                        Resistance is not futile, it is Volts divided by Amperes...
                                                                        Just ask Mr. Ohm....

                                                                        Comment

                                                                        • sdl2112
                                                                          Senior Member
                                                                          • Mar 2006
                                                                          • 571

                                                                          #37
                                                                          Originally posted by JonMarsh
                                                                          Lucky you, even though burned out! Looking very good! :T
                                                                          Yes...I can't complain. The idea of doing real work on a holiday weekend is no fun at all.

                                                                          My girlfriend was out of town this weekend so it was speaker building marathon weekend I'm actually going to finish these a lot faster than expected.

                                                                          Comment

                                                                          • dar47
                                                                            Senior Member
                                                                            • Nov 2008
                                                                            • 873

                                                                            #38
                                                                            I don't think that baffle will resonate much, but way to go on the over kill I like it :T.

                                                                            Comment

                                                                            • sdl2112
                                                                              Senior Member
                                                                              • Mar 2006
                                                                              • 571

                                                                              #39
                                                                              Originally posted by dar47
                                                                              I don't think that baffle will resonate much, but way to go on the over kill I like it :T.
                                                                              When you have scrap material laying around it's like what the heck...might as well put it to use

                                                                              Comment

                                                                              • sdl2112
                                                                                Senior Member
                                                                                • Mar 2006
                                                                                • 571

                                                                                #40
                                                                                Final assembly

                                                                                Time to put it all together :T

                                                                                I added loose wool stuffing to the cabinet and silicone foam gasket to the drivers.
                                                                                Click image for larger version

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                                                                                Wow!...I was surprised at what these weighted in at...to the knuckle test they are dead...very dead.
                                                                                Click image for larger version

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                                                                                Assembled with and w/o the magnetic grill
                                                                                Click image for larger version

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ID:	858666

                                                                                Front and rear...terminal block is for tweeter padding...std is 10 ohm, 8 ohm and 12.5 ohm are the options.
                                                                                Click image for larger version

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ID:	858667

                                                                                If anyone was curious why there are extra mounting holes in the mid-range cutout....well...I want the option to re-purpose the cabinets. I have Accuton C173-6-090 mids and Scan-Speak D3004/6640 tweeters I may use as a MT top plus bass cabinet for my next project. Good to have options .
                                                                                Click image for larger version

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Views:	1
Size:	99.1 KB
ID:	858668

                                                                                Comment

                                                                                • sdl2112
                                                                                  Senior Member
                                                                                  • Mar 2006
                                                                                  • 571

                                                                                  #41
                                                                                  Testing

                                                                                  Testing to see there are no problems...

                                                                                  Impedance of both...check :T
                                                                                  Click image for larger version

Name:	Modula MT XE imp compare.png
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ID:	858669

                                                                                  SPL...
                                                                                  Click image for larger version

Name:	Modula MT XE spl 0deg 35ms pair.png
Views:	1
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ID:	858670

                                                                                  0_15_30_45 deg horizontal at 1M
                                                                                  Click image for larger version

Name:	Modula MT XE spl 0_15_30_45deg 35ms.png
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ID:	858671

                                                                                  2nd and 3rd harmonics at 1V...very low...to make sure...I compared with my Gemini's under the same condition below.
                                                                                  Click image for larger version

Name:	Modula MT XE dist 1v sample1.png
Views:	1
Size:	20.9 KB
ID:	858672

                                                                                  Dynaudio Gemini's
                                                                                  Click image for larger version

Name:	Modula MT XE dist 0.75v gemini.png
Views:	1
Size:	21.7 KB
ID:	858673

                                                                                  Comment

                                                                                  • JonMarsh
                                                                                    Mad Max Moderator
                                                                                    • Aug 2000
                                                                                    • 15259

                                                                                    #42
                                                                                    Originally posted by sdl2112
                                                                                    Time to put it all together :T

                                                                                    I added loose wool stuffing to the cabinet and silicone foam gasket to the drivers.
                                                                                    Click image for larger version  Name:	dsc_596_597.jpg Views:	1 Size:	96.9 KB ID:	858664

                                                                                    Wow!...I was surprised at what these weighted in at...to the knuckle test they are dead...very dead.
                                                                                    Click image for larger version  Name:	DSC_0600_sm.jpg Views:	1 Size:	95.6 KB ID:	858665

                                                                                    Assembled with and w/o the magnetic grill
                                                                                    Click image for larger version  Name:	DSC_0604_sm.jpg Views:	1 Size:	99.2 KB ID:	858666

                                                                                    Front and rear...terminal block is for tweeter padding...std is 10 ohm, 8 ohm and 12.5 ohm are the options.
                                                                                    Click image for larger version  Name:	DSC_0606_sm.jpg Views:	1 Size:	96.8 KB ID:	858667

                                                                                    If anyone was curious why there are extra mounting holes in the mid-range cutout....well...I want the option to re-purpose the cabinets. I have Accuton C173-6-090 mids and Scan-Speak D3004/6640 tweeters I may use as a MT top plus bass cabinet for my next project. Good to have options .
                                                                                    Click image for larger version  Name:	DSC_0595_sm.jpg Views:	1 Size:	99.1 KB ID:	858668
                                                                                    Now that's an option worth moving to the head of the class! :T

                                                                                    Four gold stars for you today! :B
                                                                                    Last edited by theSven; 01 May 2023, 21:26 Monday. Reason: Update quote
                                                                                    the AudioWorx
                                                                                    Natalie P
                                                                                    M8ta
                                                                                    Modula Neo DCC
                                                                                    Modula MT XE
                                                                                    Modula Xtreme
                                                                                    Isiris
                                                                                    Wavecor Ardent

                                                                                    SMJ
                                                                                    Minerva Monitor
                                                                                    Calliope
                                                                                    Ardent D

                                                                                    In Development...
                                                                                    Isiris Mk II updates- in final test stage!
                                                                                    Obi-Wan
                                                                                    Saint-Saëns Symphonique/AKA SMJ-40
                                                                                    Modula PWB
                                                                                    Calliope CC Supreme
                                                                                    Natalie P Ultra
                                                                                    Natalie P Supreme
                                                                                    Janus BP1 Sub


                                                                                    Resistance is not futile, it is Volts divided by Amperes...
                                                                                    Just ask Mr. Ohm....

                                                                                    Comment

                                                                                    • JonMarsh
                                                                                      Mad Max Moderator
                                                                                      • Aug 2000
                                                                                      • 15259

                                                                                      #43
                                                                                      Originally posted by sdl2112
                                                                                      Testing to see there are no problems...

                                                                                      Impedance of both...check :T
                                                                                      Click image for larger version  Name:	Modula MT XE imp compare.png Views:	1 Size:	15.3 KB ID:	858669

                                                                                      SPL...
                                                                                      Click image for larger version  Name:	Modula MT XE spl 0deg 35ms pair.png Views:	1 Size:	17.0 KB ID:	858670

                                                                                      0_15_30_45 deg horizontal at 1M
                                                                                      Click image for larger version  Name:	Modula MT XE spl 0_15_30_45deg 35ms.png Views:	1 Size:	20.3 KB ID:	858671

                                                                                      2nd and 3rd harmonics at 1V...very low...to make sure...I compared with my Gemini's under the same condition below.
                                                                                      Click image for larger version  Name:	Modula MT XE dist 1v sample1.png Views:	1 Size:	20.9 KB ID:	858672

                                                                                      Dynaudio Gemini's
                                                                                      Click image for larger version  Name:	Modula MT XE dist 0.75v gemini.png Views:	1 Size:	21.7 KB ID:	858673

                                                                                      Looks just like where you ought to be! :T Nice work on this build! and documenting it, too!

                                                                                      But seeing these kind of results again makes me wonder if perhaps I shouldn't build the TMM concept version of this, perhaps even with the 6640 tweeters, as our music room monitor, in a fresh cabinet build? (instead of the Deluxe NatP concept build to verify the design for Bill). (should do the latter anyway- at least one cabinet- but this build of yours reminds me of all the things I like about the XE, and maybe it's time to revisit that? )
                                                                                      Last edited by theSven; 01 May 2023, 21:27 Monday. Reason: Update quote
                                                                                      the AudioWorx
                                                                                      Natalie P
                                                                                      M8ta
                                                                                      Modula Neo DCC
                                                                                      Modula MT XE
                                                                                      Modula Xtreme
                                                                                      Isiris
                                                                                      Wavecor Ardent

                                                                                      SMJ
                                                                                      Minerva Monitor
                                                                                      Calliope
                                                                                      Ardent D

                                                                                      In Development...
                                                                                      Isiris Mk II updates- in final test stage!
                                                                                      Obi-Wan
                                                                                      Saint-Saëns Symphonique/AKA SMJ-40
                                                                                      Modula PWB
                                                                                      Calliope CC Supreme
                                                                                      Natalie P Ultra
                                                                                      Natalie P Supreme
                                                                                      Janus BP1 Sub


                                                                                      Resistance is not futile, it is Volts divided by Amperes...
                                                                                      Just ask Mr. Ohm....

                                                                                      Comment

                                                                                      • dar47
                                                                                        Senior Member
                                                                                        • Nov 2008
                                                                                        • 873

                                                                                        #44
                                                                                        Completed vary nicely! How do like the sound? You better have a nice sounding room to take advantage of your planned upgrade.

                                                                                        You guys are killing me, I said I wouldn't touch the XE's but now I'm going to be fighting this next step.

                                                                                        Comment

                                                                                        • jim1961
                                                                                          Senior Member
                                                                                          • Nov 2012
                                                                                          • 357

                                                                                          #45
                                                                                          The re-purpose aspect makes a lot of sense, and could save considerable work for your next project. Great planning ahead and foresight Scott!

                                                                                          Have you considered building subs next that would meet the specs for your Accuton build and also integrate with the Modula's ?
                                                                                          Seek out and destroy early high gain room reflections

                                                                                          Comment

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