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  • MT center channel revelation

    Just a statement of revelation: I finally switched from an MTM center channel to an MT. The original had a 2nd order LR XO @ 3kHz to match the other fronts. I always thought it never quite sounded as good as the other fronts, sound quality and timbre wise. So, I considered going to a three way {W(mt)W} horizontal center. But, before making the change I decided to try an MT center and "WOW!" what a difference. The blending of the fronts became coherent as a complete sound stage and even the surround channels seemed to contribute more to the overall sonic effect. The speakers seemed to disappear as I became enveloped in sound. From a cost and practicality standpoint, I can't see why anyone would opt for any other arrangement. I would use two small TV stands with the TV straddling, if not on the wall, to leave room for a vertical center channel. This is going to be my go to option for future HT speaker builds.

  • #2
    Was this an MTM on its side (horizontal)? They're known to not be optimum, especially with in-phase crossovers like LR. You might do better with D'Appolito's original 3rd order BW quadrature crossover, if you just have to use an MTM on its side.

    A horizontal MTM seems to be oddly popular for center channels, but it's not a good idea unless the right crossover is used.
    Last edited by fpitas; 10-12-2021, 04:43 PM.
    Francis

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    • billfitzmaurice
      billfitzmaurice commented
      Editing a comment
      They're popular because they fit under a TV, and because an MTM looks better than an MT, while the average consumer hasn't the slightest idea what comb filtering and horizontal dispersion are.

    • fpitas
      fpitas commented
      Editing a comment
      Alright, that makes sense. But if they want anything like a useful speaker I'd think they wouldn't use an in-phase crossover. Unless the manufacturer is just as ignorant..

  • #3
    Put a fake or dead tweeter opposite the real/active one and call it symmetrical looking sound.

    Comment


    • billfitzmaurice
      billfitzmaurice commented
      Editing a comment
      The crossover has little to do with it. At least that's what Joe told me.

    • fpitas
      fpitas commented
      Editing a comment
      Interesting he said that. The polar pattern you get with his 3rd order Butterworth crossover has a very wide (tall?) beamwidth.

    • billfitzmaurice
      billfitzmaurice commented
      Editing a comment
      Those polar patterns you see posted for MTMs only look like that close to the speaker. At normal listening distances they don't, due to wavefront integration.

  • #4
    I have had 3 MTM center channel speakers and one WMTW, the D'Appolito designed Audax HT system from years ago. All sounded fine to me.

    Here's a design Lunchmoney did with help from Zaph for a center channel unit to go with his SR71.

    https://techtalk.parts-express.com/f...ight=blackbird

    Comment


    • fpitas
      fpitas commented
      Editing a comment
      I just see an MT there. I remember MTM horizontal centers here, but they did have 3rd order quadrature crossovers.

    • djg
      djg commented
      Editing a comment
      The OP was very happy with his MT vs his MTM. I linked the MT by Lunchmoney as one solution, a sideways MT for space considerations. OTOH, I've been happy with my Zaph BAMTM, my DIYSG/Carmody S2000 MTM, and now my cjd RS150 MTM. I sit in the middle.

  • #5
    Originally posted by djg View Post
    I have had 3 MTM center channel speakers and one WMTW, the D'Appolito designed Audax HT system from years ago. All sounded fine to me.

    Here's a design Lunchmoney did with help from Zaph for a center channel unit to go with his SR71.

    https://techtalk.parts-express.com/f...ight=blackbird
    The Audax HT design was actually a very nice design. Too bad the drivers aren't still available. I built a set for my little brother and he is still using them.

    The Am
    ​​​​WMTM with the original RS driver that Dennis Murphy designed for me is still my favorite by far.

    Comment

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