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OSTMM with higher quality Tweeter

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  • OSTMM with higher quality Tweeter

    I moved on to a few builds after starting with the Overnight Sensations. Yet those good looking bronze drivers keep calling. The OSTMMs look like a great build for a medium room with other bronze features. But nice as the b4n's look, going from ribbons and AMTs back to the T20 or the ND20 does NOT sound appealing. Has anyone built these with a superior tweeter? Something with higher performance and unique ascetics, like the Peerless XT25s or AMTs?

  • #2
    ive heard the HiVi SD1.1A tweeters in two ways and 2.5 way towers using the HiVI M6N woofers , they are interesting looking and sound great , dont be fooled by the price .
    donc

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    • #3
      Has anyone built these with a superior tweeter?
      If you change the tweeter you must design a new Xover as well...

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      • #4
        I should have formed the posting title as a question asking exactly that. Being one of the most popular builds of all time, particularly in TM and MTM form, has anyone upgraded the tweeter while keeping the unique look of the B4n's?

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        • #5
          I feel the xt25 has a more refined sound, but it's not a ribbon. Why not use your choice of ribbon or amt?
          http://techtalk.parts-express.com/fo...khanspires-but
          http://techtalk.parts-express.com/fo...pico-neo-build
          http://techtalk.parts-express.com/fo...ensation-build

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          • #6
            In a nutshell, the arrival of a new, very fat, very happy baby has meant that there isn't the time to wrestle with microphone measurements and impedance curves to properly adapt a different tweeter to the existing design. Not even close. But for cabinets a friend is able to provide some pity-CNC'ing, and stealing away to the garage for 10-15 minutes to glue and stain most evenings is feasible. So it would be awesome if there is an adapted design around a more engaging tweeter.

            The acoustically devoid room that stands to benefit has a lot of bronze and nothing would look better than the b4n. Another possibility would be a floor-stander other than the OS TMM, but the simplicity of this design is appealing. Really want to build a TMM.
            Last edited by TheManFromDenver; 09-20-2019, 12:06 PM.

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            • #7
              It's tough when time is so precious, the build really has to check all the right boxes to be rewarding over the extended time required of a year or more (egh). Gathering that a tweak of this design as mentioned isn't available. Any other recommended TMM designs with the b4n? Unfortunately the forum says there are too many results to display with those search terms.

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              • #8
                I don't recall which HiVi driver they use, but the swope, and there is a rather large tower which I cannot remember the name of, that uses several of the metal cone HiVi drivers. IIRC, both have that HiVi 'look'.
                http://techtalk.parts-express.com/fo...khanspires-but
                http://techtalk.parts-express.com/fo...pico-neo-build
                http://techtalk.parts-express.com/fo...ensation-build

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                • #9
                  Several years ago (2014?) I did an OS TM with an SB29RDCN tweeter. I did a complete crossover redesign since the SB29 could cross much lower. I took it to the Iowa DIY that year and received a lot of positive comments. I have the drivers to do a TMM version, but always seem to have other designs farther ahead in the queue.
                  "Everything is nothing without a high sound quality." (Sure Electronics)

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                  • #10
                    Those are good suggestions. After some soul (and wallet) searching, I'm going to try adapting the XT25 to the original OSTMM design, relying on REW for impedance and frequency sweep. Not sure where the time for this is going to come from. Winter is coming..

                    Raises the question: How are most people measuring speaker performance without interference when its 10 degrees outside?

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                    • #11
                      in Houston winter coming means nothing .
                      donc

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                      • #12
                        Originally posted by TheManFromDenver View Post
                        Raises the question: How are most people measuring speaker performance without interference when its 10 degrees outside?
                        Measure indoors with appropriate gating. Bagby white paper.

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                        • #13
                          oops
                          Last edited by Chris Roemer; 10-03-2019, 12:20 PM.

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                          • #14
                            Plus, as mentioned in the Bagby white paper, measuring the acoustic offset.

                            Attached Files
                            "Everything is nothing without a high sound quality." (Sure Electronics)

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                            • #15
                              Originally posted by a4eaudio View Post

                              Measure indoors with appropriate gating. Bagby white paper.
                              When you clicked Post Reply with this link I hope you simultaneously yelled "BLAM!" How nice it would be if every question on the forum could be answered with a white paper.

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