TB 6.5" Underhung Midwoofer

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  • Hdale85
    Moderator Emeritus
    • Jan 2006
    • 16073

    TB 6.5" Underhung Midwoofer

    Just wondering if anyone has seen this yet? Looks interesting.



  • Bastek
    Member
    • Apr 2008
    • 41

    #2
    Very handsome looking. Is this the SS-Seas buster i 'v been waiting for?

    Comment

    • Hdale85
      Moderator Emeritus
      • Jan 2006
      • 16073

      #3
      Not sure about that....if so its one heck of a deal.

      Comment

      • peter_m
        Senior Member
        • Sep 2007
        • 227

        #4
        Kind of looks like an SB acoustics.

        Comment

        • ---k---
          Ultra Senior Member
          • Nov 2005
          • 5204

          #5
          I've never learned what an "Underhung design " meant or what the advantages were. Got any links to references?
          - 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

          • ThomasW
            Moderator Emeritus
            • Aug 2000
            • 10933

            #6
            Quick and dirty..


            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

            • Nwalmaer
              Junior Member
              • Apr 2008
              • 6

              #7
              I have the distorsion and off-axis curves for the drivers in this series. I think it looks good but when I posted it in a Swedish DIY-forum most people where just whining about wrong dB scales and whatnot. Their loss, IMHO.




              Emil Attlid
              Attlid.eu

              Comment

              • Hdale85
                Moderator Emeritus
                • Jan 2006
                • 16073

                #8
                Hmm I wonder when the 8" will come out

                Comment

                • ---k---
                  Ultra Senior Member
                  • Nov 2005
                  • 5204

                  #9
                  Thanks Thomas. That worked.
                  - 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

                  • Jonasz
                    Senior Member
                    • Nov 2004
                    • 852

                    #10
                    Hmm all of those TB's looks good. The on- and offaxis responses looks very good and so does the distortion considering it's been raised by 30 dB... Can one trust their measurements?

                    Comment

                    • Paul Ebert
                      Senior Member
                      • May 2004
                      • 434

                      #11
                      It does look like a nice set of drivers. Personally, I'd wait for independent measurements - they aren't exactly cheap. Also, I'm surprised that the 6.5 isn't more efficient given that it's a 4 ohm and has a paper cone. Lastly, it seems to me that the Le isn't all that low for a motor with a shorting ring.

                      Comment

                      • Hdale85
                        Moderator Emeritus
                        • Jan 2006
                        • 16073

                        #12
                        Well they aren't all that expensive either. I mean if you look at just about anything from seas your talking tons more.... They are slightly more then Dayton RS drivers but not much it seems.

                        Comment

                        • Paul Ebert
                          Senior Member
                          • May 2004
                          • 434

                          #13
                          True. They do seem to be a good deal if the specs are accurate. I guess I was saying that they're more than I would plunk down without verified measurements. Same would go for the RS series (go ahead, call me skeptical).

                          Comment

                          • Dennis H
                            Ultra Senior Member
                            • Aug 2002
                            • 3798

                            #14
                            The Le looks like a typo. Should be uH instead of mH.

                            Comment

                            • Nwalmaer
                              Junior Member
                              • Apr 2008
                              • 6

                              #15
                              The low efficiency I assume comes from the long excursion. The specified number is +-, not peak-to-peak, just so you know. The Scan-Speak Illuminators has similar excursion and higher efficiency (IIRC) but that's a neodymium motor and the price is not remotely comparable. If the TBs had the same sized motor with neodymium they wouldn't cost $50.

                              I'll definetly build something with one of them, maybe a two-way with the eight inch and the Beryllium tweeter if it measures well.
                              Emil Attlid
                              Attlid.eu

                              Comment

                              • Hdale85
                                Moderator Emeritus
                                • Jan 2006
                                • 16073

                                #16
                                If the 8" plays rather low it may be a candidate for my car.

                                Comment

                                • Jed
                                  Ultra Senior Member
                                  • Apr 2005
                                  • 3621

                                  #17
                                  Is PE going to carry the 8"?

                                  Comment

                                  • Hdale85
                                    Moderator Emeritus
                                    • Jan 2006
                                    • 16073

                                    #18
                                    I would imagine so.... They just came out I believe? At the moment I only see the 6.5" although I have not looked for the smaller ones. I was wondering Jed, would the 5" fit in the statements or does it require to much volume? I have not tried to map them out with unibox yet been kind of busy.

                                    Comment

                                    • Hdale85
                                      Moderator Emeritus
                                      • Jan 2006
                                      • 16073

                                      #19
                                      Ah they do have the 5"....hmm I wonder why they don't have the 8"

                                      Comment

                                      • Jed
                                        Ultra Senior Member
                                        • Apr 2005
                                        • 3621

                                        #20
                                        Originally posted by Dougie085
                                        I would imagine so.... They just came out I believe? At the moment I only see the 6.5" although I have not looked for the smaller ones. I was wondering Jed, would the 5" fit in the statements or does it require to much volume? I have not tried to map them out with unibox yet been kind of busy.

                                        Do you mean the Maxx? If so I did look at the 5" and it requires a much larger volume than the W5 876. But the 4" would work as would the RS125-4 wired in series.

                                        Jed

                                        Comment

                                        • Hdale85
                                          Moderator Emeritus
                                          • Jan 2006
                                          • 16073

                                          #21
                                          Yeah sorry I was a bit distracted sorry Even sealed off it would be to little space? They probably wouldn't offer more output but they are definitely built better. Probably not something I would do anyways just thoughts that pop into my mind.

                                          Comment

                                          • Jed
                                            Ultra Senior Member
                                            • Apr 2005
                                            • 3621

                                            #22
                                            Originally posted by Dougie085
                                            Yeah sorry I was a bit distracted sorry Even sealed off it would be to little space? They probably wouldn't offer more output but they are definitely built better. Probably not something I would do anyways just thoughts that pop into my mind.
                                            F3 80z so you'd need a sub with the 5". The best 5" woofer I've modeled in a small box with the deepest bass is the Hivi D5.8. They're just a bit expensive though.

                                            Jed

                                            Comment

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