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  • The Xtreme SO sounds interesting. I looked at the pricing of the drivers:

    For a single TMW it would be around : $256
    For a single TMWW it would be: $340

    If I were to buy those drivers, would it be easy to adapt an existing crossover and enclosure to suit, or would it require extensive modelling and testing?

    Comment


    • I will have all the drivers soon. In a week or thereabouts I should have measured data on the RS270 and the NE180W in the proposed configuration for the SO. These are the white spots in the data picture at this time.

      The configuration for the Modula Xtreme and Modula Xtreme SO is based on TMWW. Top cabinet as described, the 1/2 cut ft PE cabinet- or build your own similar. Woofer cabinets are the 1 cu Ft PE Sub cabinets- per each 10" driver- or build your own similar. The most similar existing crossover would be that of the Ardent- you could use it to price out the approximate cost.

      What I strongly suggest is that you wait until I have the new midwoofer and time to test them and the RS270 in the existing enclosures I have on hand- that will probably get done next weekend, at the outside, the weekend after. Then I can have a preliminary crossover design pretty quickly after that, as it will be a full three way based on Duelund concepts, like the Ardent is, with adaptations as needed for the tweeter + waveguide behavior.

      If the driver performance looks good after testing, and the network cost looks acceptable, that might be the time for you to consider your purchase options.

      From my perspective, I know the RS70 is fairly low distortion (though not as low as the Scanspeaks, obvioiusly), and I'm pretty confident about it working well in the proposed alignment. But when I was a little kid, for a while we lived in Missouri, so from that I suppose I've got a bit of the "show me" attitude. The real question mark is the Vifa midwoofer. The impedance curve suggests a very low inductance motor design with lots of copper in the gap, that SHOULD have very low midrange distortion, and the amplitude response looks tunable.

      But until I have it in my hands, I certainly wouldn't suggest someone else commit their money, unless, I was in a Clint Eastwood kind of mood....

      "Are you feeling lucky?"
      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


      • It all sounds good, i'll be patient (I'm not feeling lucky )

        Comment


        • I cant bear to see this on page 2 any more

          Any updates, or are the Ardents the priority at the moment?

          Comment


          • Testing was done on the NE180W- see the Modula testing thread under Drivers Wanted- it looks as good or better as hoped. RS270 testing and some other bits later this weekend, then focusing on Ardents.
            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


            • Jon - do you still expect at some point to look further into the "slightly less Xtreme" TMWW tower with dual RS225s on the bottom? Or have the Xtreme variants discussed more recently sort of supplanted that?

              Not looking for a "when" as we all know you are Xtremely busy with a lot on your plate right now; just hoping for a tentative "if".
              Paul G

              Comment


              • The TMWW 2.5 way is very much in development- that's one thing the NE180W is being considered for, first of all, though the ER18RNX is still well in the running. Most of the crossover parts are on hand, too. This is planned to finish in time for the Northern CA DIY in late April.

                The Xtreme variant is a full three way with larger cabinet system and and more "Xtreme" drivers. I have all the cabinet materials on hand for the TMWW, and all the drivers- will be doing tests on the LF alignment this weekend. The weather isn't cooperating so I probably won't get around to setting up the saw on the patio this weekend.
                Last edited by JonMarsh; 28 February 2010, 10:54 Sunday.
                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


                • A small update, regarding the TMWW, finished all driver measurements in cabinets yesterday, have data for starting the final crossover design- FCA alignment looks to be working out as modeled. Looks like it will be a nice small footprint slim tower, could work well in space limited applications- like my master bedroom!
                  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


                  • Originally posted by JonMarsh
                    What I strongly suggest is that you wait until I have the new midwoofer and time to test them and the RS270 in the existing enclosures I have on hand- . . . .

                    From my perspective, I know the RS70 is fairly low distortion (though not as low as the Scanspeaks, obvioiusly),

                    "Are you feeling lucky?"
                    My findings might mirror yours. IMO and for the money, I think the standard L26 is hard to beat below 150-200hz. For mid bass duties the RS270 is hanging with the Excel W26 and Scan Speak 26W, but has the added sensitivity which is a plus as well. I didn't test these all the same day, FYI.

                    Seas L26 85dbs
                    Image not available

                    Seas Excel W26 :E
                    Image not available

                    Here's the Scan Speak 26W 8 ohm:
                    Image not available

                    Dayton RS270s
                    Image not available

                    Seas L26ROY

                    Harmonic distortion
                    Image not available
                    Last edited by svenarajala; 10 March 2023, 20:30 Friday. Reason: Update image location

                    Comment


                    • Thanks, Jed!
                      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


                      • The L26 does look quite impressive and is clearly a bargain. It's interesting that it does so well up against motors with copper rings.

                        Comment


                        • My impression, Paul, is that the fundamental motor symmetry and gap saturation determine the low frequency distortion- but the copper rings control inductivity modulation and limit the rise in higher frequency distortion. One reason that well designed underhung motors can actually have decreasing distortion consistently with increasing frequency, whereas a simpler design may do well in the low and mid bass, but not so well in the upper midrange.
                          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


                          • Hi Jon. Have you been able to do any more testing, if so, were the results postive?

                            Comment


                            • All of the drivers and configurations for both versions of the Xtreme have been tested, and I consider them a "go"; final cabinets are in construction. The only thing I'm changing at this point is using the Scanspeak D2608 for both versions for now.
                              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


                              • Back on Topic: Modula MT MkII PDF

                                OK, it's been hard to find time to work on this the last several weeks due to an onslaught of business travel, but for once this weekend, I'm not going anywhere next week and have had some time to finish the preparation. I'm also re-posting this at the beginning.


                                This is a download link on my .MAC site - click on this and the PDF should start downloading. It's only 6 MB, if you want to down load directly and not open in your browser, then right click and "save as".

                                Modula MT MkII PDF


                                Click image for larger version  Name:	MkII PDF Cover.jpg Views:	20552 Size:	89.3 KB ID:	854543
                                Last edited by svenarajala; 10 March 2023, 20:32 Friday. Reason: Update image location
                                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


                                • Thank you for the excellent writeup.

                                  Comment


                                  • Great writeup, Jon. Makes me want more tools.

                                    It also brought up something I have been thinking about for a while: Toroidal inductors. I would imagine they would be superior to solenoid/coils in some way, but they're pretty rare in the DIY audio scene. Can you shed some light on this?

                                    :3
                                    -Josh

                                    That feeling when things are finally going right. Yeah, that one.

                                    Comment


                                    • Originally posted by ultrakaz
                                      Thank you for the excellent writeup.
                                      I second that. Thanks!

                                      Comment


                                      • Originally posted by numberoneoppa
                                        Great writeup, Jon. Makes me want more tools.

                                        It also brought up something I have been thinking about for a while: Toroidal inductors. I would imagine they would be superior to solenoid/coils in some way, but they're pretty rare in the DIY audio scene. Can you shed some light on this?

                                        :3
                                        Basically, they're more expensive to make. You have to use a material that is gapped by the binder, as otherwise the permeability is too high (such as if you had circular steel sheet plates). Also, the equipment to wind the coils is more expensive.

                                        Toroidal cores are very common in applications like switchmode power supplies, where the suppression of flux leakage from the core is a big advantage. Typically they're made with powdered iron or permalloy materials, though for some applications sintered ferrites are used.
                                        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


                                        • Excellent job Jon!
                                          SEOS 12/AE TD10M Front Stage in Progress

                                          Comment


                                          • Thanks for the kind words, guys. Now let's see if I can put something similar together for the Ardents - that will be a little bit bigger job, I think! It is underway, though.
                                            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


                                            • Hi Jon,

                                              Great work. Now, let's see where I can get these waveguides in europe...

                                              Best regards,
                                              Mogens

                                              Comment


                                              • very very nice writeup!!

                                                I am awaiting a wave guide MTWW... is that in the books i.e. Modula MTWW in your signature? :T

                                                The Modula MT would make incredible surround speakers with the AWESOME off axis response.

                                                You should get a young pup to make the cabinets to your specs for free and send them to you.... hint hint, then you could concentrate on the true mastery.
                                                Gavin

                                                BAMTM Build

                                                Comment


                                                • Thank you for the write up, cant wait to have a read through it.

                                                  Comment


                                                  • Thanks Jon; you are very generous...

                                                    Ray
                                                    Wine is constant proof that God loves us, and loves to see us happy.
                                                    BENJAMIN FRANKLIN

                                                    Comment


                                                    • Originally posted by mkc
                                                      Hi Jon,

                                                      Great work. Now, let's see where I can get these waveguides in europe...

                                                      Best regards,
                                                      Mogens
                                                      I'm also wondering where to buy these waveguides in Europe. If there is no success, maybe we could use wg-300.

                                                      And I wanted to ask you more skilled and wise, if this toroid http://www.europe-audio.com/Product.asp?Product_ID=7519 is usable for this purpose.

                                                      Regards,
                                                      Peter

                                                      Comment


                                                      • Originally posted by gazik
                                                        I'm also wondering where to buy these waveguides in Europe. If there is no success, maybe we could use wg-300.

                                                        And I wanted to ask you more skilled and wise, if this toroid http://www.europe-audio.com/Product.asp?Product_ID=7519 is usable for this purpose.

                                                        Regards,
                                                        Peter
                                                        Probably would be, the DCR is higher, about double, but still reasonable- what's hard to know is where the core starts soft saturation and affects distortion. This I know for the Jantzen C-Core, and it's at about 250W- it is overkill for this project, but then it will have no more problems than an Air core, and it would be very hard to get an air core with the DCR.
                                                        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


                                                        • Originally posted by JonMarsh
                                                          Probably would be, the DCR is higher, about double, but still reasonable- what's hard to know is where the core starts soft saturation and affects distortion. This I know for the Jantzen C-Core, and it's at about 250W- it is overkill for this project, but then it will have no more problems than an Air core, and it would be very hard to get an air core with the DCR.
                                                          I have not be pleased with ferrite cores, although I have not tried the Jantzen C-Cores. With my low listening levels, I assumed that it was due to hysteresis as opposed to saturation. Any sage advice?

                                                          Comment


                                                          • It's important to distinguish between Ferrites and powdered iron with binders or other powdered metal type cores which use binders to achieve a distributed gap.

                                                            Examples in the SMPS world are materials like Magnetics Inc. High Flux, XFlux, etc.

                                                            Ferrites are good transformer materials; can have pretty low core losses at moderately high frequencies, but normally the permeability is high and they saturate at relatively low levels. This is gotten around in applications like inductors or flyback transformers by introducing a gap (usually in the center leg of a three leg structure), but here the problem is that you get strong fringing flux around the gap which can introduce eddy currents in the winding- another loss, another nonlinearity.

                                                            Distributed gap materials such as powdered metal toroids can be adjusted in permeability by the shape of the magnetic particles used and the binders, to control the AL product, i.e, the inductance per turn, as well as the saturation level- lower mu means higher ampere turns can be sustained. Generally these materials have a soft saturation curve, whereas Ferrites kind of run into the wall, even gapped Ferrites.

                                                            But all this stuff is from my day job, and I'd rather not get into that here! :B
                                                            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


                                                            • Could I get your opinion on what would compliment my setup? I have a double passive radiator 12" sub with plate amp connected to Onkyo 807.

                                                              Im wondering if there would be any benefit using the Xtreme version of the modular series since I already have a sub? I think having two woofers and a double passive rad might be a bit much even for me, and perhaps I should just go with a TMM?

                                                              Finally as a compromise, how difficult would it be for me to adapt your future plans of the TMWW SO Xtreme Modula speaker into a TMW, using exactly the same drivers, just a single woofer.

                                                              Comment


                                                              • Originally posted by spadez
                                                                Could I get your opinion on what would compliment my setup?
                                                                The answer is dependent on the size of the listening room, distance from the speakers to listening position, and how loud you want the system to play.

                                                                IB subwoofer FAQ page


                                                                "Complicated equipment and light reflectors and various other items of hardware are enough, to my mind, to prevent the birdie from coming out." ...... Henri Cartier-Bresson

                                                                Comment


                                                                • My listening room is fairly small (4M x 4M) but I want these to be future proof if I move. I want them to be able to go loud. The distance between the speakers and me is around 2M.

                                                                  Comment


                                                                  • If the future is guaranteed to be a larger room and improved electronics, go with a speaker having more Vd

                                                                    IB subwoofer FAQ page


                                                                    "Complicated equipment and light reflectors and various other items of hardware are enough, to my mind, to prevent the birdie from coming out." ...... Henri Cartier-Bresson

                                                                    Comment


                                                                    • Adapting to a different Baffle size (yes I know....)

                                                                      My first post after years of lurking and learning!

                                                                      Ok So I have a question that may be considered as having an obvious answer.

                                                                      I have an existing enclosure with a similar volume but the baffle is 12.5" W x 19"H.

                                                                      I have calculated that the baffle step correction in the crossover for a 10" width baffle should be at 456Hz. For my intended baffle width it would be 365Hz. Without any change in the crossover it would presumably mean an approximately 4db hump between those two points?

                                                                      Now here is the dumb part-

                                                                      Can L1 be adjusted for the change or will it affect the entire crossover?

                                                                      Comment


                                                                      • It affects other parameters in the crossover, to some degree. A two inch wider enclosure will change the baffle step frequency, but I really don't see it putting a 4 dB bump in the response. (I could be wrong, it's happened before, I think it was July of 1999... ) :W Making it wider will lower the frequency at which it radiates into half space- easiest way to see the difference would be to use EDGE or Excel based BDS to compare the difference for the enclosure size. Then you could modify the transfer function from the original target function (in the PDF) using one of the free ware tools (from FRD consortium, for example) or using a standard crossover design program. What will most likely happen is a slight bump in the 750 Hz area, 1-2 dB. To some extent, you can tune BSC by a parallel R value to the main inductor.

                                                                        My first reaction is don't worry about re-tuning anything until you build and measure, but you can evaluate the results roughly in the manner shown above. Keep in mind that at the upper transition frequency, you tend to get an on axis bump, which can be accompanied by an off axis dip. In the end, without doing off axis curves and evaluating the power response, it's best not to "over react".
                                                                        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


                                                                        • Originally posted by spadez
                                                                          Could I get your opinion on what would compliment my setup? I have a double passive radiator 12" sub with plate amp connected to Onkyo 807.

                                                                          Im wondering if there would be any benefit using the Xtreme version of the modular series since I already have a sub? I think having two woofers and a double passive rad might be a bit much even for me, and perhaps I should just go with a TMM?

                                                                          Finally as a compromise, how difficult would it be for me to adapt your future plans of the TMWW SO Xtreme Modula speaker into a TMW, using exactly the same drivers, just a single woofer.
                                                                          Well, keep in mind there's a difference between the sub range and the woofer range. Many subs fall apart on harmonic distortion with rising frequency above 100 Hz due to inductivity modulation. The Scanspeak and RS270 have a fair amount of air moving capability, AND low distortion in the midbass and midrange, too.

                                                                          Changing from a TMWW to a TMW presents problems with regards to the voltage sensitivity and BSC. Dual drivers give 3 db coupling increase and 3 dB power draw increase, netting 6 dB greater output sensitivity for the same drive voltage. Going to a single woofer means scaling back the mid and tweeter sensitivity by 6 dB. Another factor to consider is that the dual woofer stack has different and complementary loading characteristics into the room- this gives both good boundary coupling at the floor and a taller source which helps to minimize floor bounce effects. If you only use one woofer, which do you use? You'll tend to lose out a bit in one parameter or the other, IME, which is another reason I'm pursuing this design as planned.

                                                                          Keeping the distortion low and the room interaction minimized is an important factor to helping a speaker pull a disappearing act.

                                                                          I'd say you'd be better served following the TMWW construction, and then using a conventional sub crossover setup down around 50-60 Hz, if you want to unload the deepest bass area and extend response into the 20's.

                                                                          Just my 0.02, of course, YMMV, etc. That's what I'm planning to do, though. I just haven't decided which of the oodles of sub drives I have lying around I'm going to go with- planning a push-push sealed stereo approach with LT in a smallish box, drivers radiating to each side. Maybe my BPD12's, if I can find them. 28 mm XMAX, and ginormous magnets.


                                                                          Nothing fancy or sexy, maybe a bit agricultural looking by todays standards, but plenty of Xmax.


                                                                          Click image for larger version

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                                                                          Last edited by svenarajala; 10 March 2023, 20:33 Friday. Reason: Update image location
                                                                          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


                                                                          • I think that is terrific when you can actually misplace a pair of Blueprint 1203's.

                                                                            Comment


                                                                            • Terrifically absent minded! but then there is a pretty large block of drivers in boxes stacked up in my storage, the Blueprints just get lost among the Daytons, Aurasounds, Scanspeaks, Exodus, B&G, Fountek, Accuton and Stryke drivers. :W
                                                                              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....

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                                                                              • Originally posted by JonMarsh
                                                                                I'd say you'd be better served following the TMWW construction, and then using a conventional sub crossover setup down around 50-60 Hz, if you want to unload the deepest bass area and extend response into the 20's.
                                                                                come on TMWW!!!! :B :T ;x(

                                                                                need me to go on your business trips so you have time to pursue your passion? 8O
                                                                                Gavin

                                                                                BAMTM Build

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                                                                                • Thank you for the input Jon, Xtreme SO it is then. Im very eagerly awaiting the plans, but no rush because I feel guilty about the amount of information your giving us

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                                                                                  • Originally posted by spadez
                                                                                    Thank you for the input Jon, Xtreme SO it is then. Im very eagerly awaiting the plans, but no rush because I feel guilty about the amount of information your giving us
                                                                                    it is very unusual in this world for someone to whole heartily devote so much time and effort and money, for free; which goes out to many of the great people on this forum. :T

                                                                                    some day I hope to repay the favor, if at all possible.
                                                                                    Gavin

                                                                                    BAMTM Build

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                                                                                    • Originally posted by savage25xtreme
                                                                                      it is very unusual in this world for someone to whole heartily devote so much time and effort and money, for free; which goes out to many of the great people on this forum. :T

                                                                                      some day I hope to repay the favor, if at all possible.
                                                                                      You can send cash. I'm sure they would be very appreciative. :lol:
                                                                                      John

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                                                                                      • I would donate drivers or x-over parts for a build, that's for sure

                                                                                        in Jon's case his most restrictive resource is TIME.
                                                                                        Gavin

                                                                                        BAMTM Build

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                                                                                        • Is it only me confused about the renaming of this thread?
                                                                                          -Josh

                                                                                          That feeling when things are finally going right. Yeah, that one.

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                                                                                          • XE stands for Xtreme edition... I believe.
                                                                                            Gavin

                                                                                            BAMTM Build

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