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  • Center channel blues


    so my problem is right now, how to finish off my center channel for the HT. I'm currenty wanting to use Ascendant Audio's 6.5" poly mids
    <A HREF="http://www.ascendantaudio.com/poly_6.5_page.html">http://www.ascendantaudio.com/poly_6.5_page.html</A>

    from what the specs and graph show, these look to be exactly what I am looking for. Now the real problem comes in. Do I go for a 2-way or a 3-way. If I go for the 2-way I was looking at useing the Hi-Vi RT2H-A planer tweet
    <A HREF="http://www.partsexpress.com/pe/showd...number=297-407">http://www.partsexpress.com/pe/showd...number=297-407</A>

    But if i went for a 3-way, I'd want to use a dome mid. Currently my selections are the Morel MDM55 and the Hi-Vi dome mid. but that limits me to a diferent hi-end driver to use. Mostly because I want to keep the mid and tweet vertical and not side by side. I'm sure there are a few other drivers out there I could use. but I'm trying to keep this center around the 8ohm area due to the current amp I have. And as much as I would like a nice sleek looking center that sits nicely on top of the Tv, I KNOW i'm dreaming when it comes to that. this is more than likely going to be something the TV sits on, Ohh hell I might even break down and build it right into a TV stand.

    any help or hints would be greatful. I think it's just a case of too many ideas floating around in my head all at once.

    Rene D

  • #2
    Re: Center channel blues


    11.5mm of excursion, one way- SO EXTREME!

    I don't know how much space you have, or how big your TV is, but a nice wide center like that cyclone or whatever might be cool if the dimensions work out that way.

    But, if I were making a center channel speaker, I would probably just go with a MTM config, something small enough that it could be used with any TV, not to limit itself for the ages to a single setup.

    > so my problem is right now, how to finish
    > off my center channel for the HT. I'm
    > currenty wanting to use Ascendant Audio's
    > 6.5" poly mids
    >
    > <A HREF="http://www.ascendantaudio.com/poly_6.5_page.html">http://www.ascendantaudio.com/poly_6.5_page.html</A>
    > from what the specs and graph show, these
    > look to be exactly what I am looking for.
    > Now the real problem comes in. Do I go for a
    > 2-way or a 3-way. If I go for the 2-way I
    > was looking at useing the Hi-Vi RT2H-A
    > planer tweet
    >
    > <A HREF="http://www.partsexpress.com/pe/showd...number=297-407">http://www.partsexpress.com/pe/showd...number=297-407</A>
    > But if i went for a 3-way, I'd want to use
    > a dome mid. Currently my selections are the
    > Morel MDM55 and the Hi-Vi dome mid. but that
    > limits me to a diferent hi-end driver to
    > use. Mostly because I want to keep the mid
    > and tweet vertical and not side by side. I'm
    > sure there are a few other drivers out there
    > I could use. but I'm trying to keep this
    > center around the 8ohm area due to the
    > current amp I have. And as much as I would
    > like a nice sleek looking center that sits
    > nicely on top of the Tv, I KNOW i'm dreaming
    > when it comes to that. this is more than
    > likely going to be something the TV sits on,
    > Ohh hell I might even break down and build
    > it right into a TV stand.

    > any help or hints would be greatful. I think
    > it's just a case of too many ideas floating
    > around in my head all at once.

    > Rene D

    Comment


    • #3
      Re: Center channel blues


      ya, a lot of excursion. but the $35 price tag and FR plot are what got me.

      only have a 27" right now. but we're getting another TV some time inthe next year or so. So I have no problem with a wider center channel. Plus I think it just gives me an excuse to build more things. been wanting a new entertainment unit for some time now. Might as well use the excuse of the center channel worth while ;)

      Rene D

      > 11.5mm of excursion, one way- SO EXTREME!

      > I don't know how much space you have, or how
      > big your TV is, but a nice wide center like
      > that cyclone or whatever might be cool if
      > the dimensions work out that way.

      > But, if I were making a center channel
      > speaker, I would probably just go with a MTM
      > config, something small enough that it could
      > be used with any TV, not to limit itself for
      > the ages to a single setup.

      Comment


      • #4
        Re: Center channel blues *PIC*




        > ya, a lot of excursion. but the $35 price
        > tag and FR plot are what got me.

        > only have a 27" right now. but we're
        > getting another TV some time inthe next year
        > or so. So I have no problem with a wider
        > center channel. Plus I think it just gives
        > me an excuse to build more things. been
        > wanting a new entertainment unit for some
        > time now. Might as well use the excuse of
        > the center channel worth while ;)

        > Rene D

        If you go for a two-way, don't use the planar. It won't cross low enough. Instead, consider the RS28 or the SEAS 27TDFC or 27TBFC. Any of those tweeters will be able to cross at 1.5KHz cleanly.

        If you go for the MDM55, think about putting the MDT40 with it, or perhaps the Vifa D26NC55 while you can still get them. The small faceplate Vifa is an EXCELLENT tweeter when crossed above 2KHz and will pack tightly with the MDM55, as would the MDT40. Then consider this . . .

        Instead of the Ascendant driver, how about 4 of the Dayton DA135 aluminum drivers. They have very good midbass distortion numbers, are only 5.25" wide, and 4 of them will have the same displacement as the ascendant and still cost less than $50 for a set of 4. WW-T/M-WW crossed at 800Hz, 2.5KHz. I'd wager they'd have better dynamics too since you'd be spreading the power into more voice-coils, so less thermal compression.
        R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
        Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

        95% of Climate Models Agree: The Observations Must be Wrong
        "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

        Comment


        • #5
          Re: Center channel blues *PIC*



          Provided Link: Ascendant Audio poly 6.5&quot; FR


          the MDT40 was my other choice with the MDM55, and if I don't go for the ascendant 6.5", I'll go with the silver flute 6.5". As for the X-over. I was looking at doing the 2-way around 2k. the Ascendant shouldn't have too much of a problem with that, As long as I do a 12dB slope or so.

          but like you said, the MDM55 and the MDT40 will have a nice compact fit.

          Rene D

          > If you go for a two-way, don't use the
          > planar. It won't cross low enough. Instead,
          > consider the RS28 or the SEAS 27TDFC or
          > 27TBFC. Any of those tweeters will be able
          > to cross at 1.5KHz cleanly.

          > If you go for the MDM55, think about putting
          > the MDT40 with it, or perhaps the Vifa
          > D26NC55 while you can still get them. The
          > small faceplate Vifa is an EXCELLENT tweeter
          > when crossed above 2KHz and will pack
          > tightly with the MDM55, as would the MDT40.
          > Then consider this . . .

          > Instead of the Ascendant driver, how about 4
          > of the Dayton DA135 aluminum drivers. They
          > have very good midbass distortion numbers,
          > are only 5.25" wide, and 4 of them will
          > have the same displacement as the ascendant
          > and still cost less than $50 for a set of 4.
          > WW-T/M-WW crossed at 800Hz, 2.5KHz. I'd
          > wager they'd have better dynamics too since
          > you'd be spreading the power into more
          > voice-coils, so less thermal compression.

          Comment


          • #6
            Re: Center channel blues


            > so my problem is right now, how to finish
            > off my center channel for the HT. I'm
            > currenty wanting to use Ascendant Audio's
            > 6.5" poly mids
            >
            > <A HREF="http://www.ascendantaudio.com/poly_6.5_page.html">http://www.ascendantaudio.com/poly_6.5_page.html</A>
            > from what the specs and graph show, these
            > look to be exactly what I am looking for.
            > Now the real problem comes in. Do I go for a
            > 2-way or a 3-way. If I go for the 2-way I
            > was looking at useing the Hi-Vi RT2H-A
            > planer tweet
            >
            > <A HREF="http://www.partsexpress.com/pe/showd...number=297-407">http://www.partsexpress.com/pe/showd...number=297-407</A>
            > But if i went for a 3-way, I'd want to use
            > a dome mid. Currently my selections are the
            > Morel MDM55 and the Hi-Vi dome mid. but that
            > limits me to a diferent hi-end driver to
            > use. Mostly because I want to keep the mid
            > and tweet vertical and not side by side. I'm
            > sure there are a few other drivers out there
            > I could use. but I'm trying to keep this
            > center around the 8ohm area due to the
            > current amp I have. And as much as I would
            > like a nice sleek looking center that sits
            > nicely on top of the Tv, I KNOW i'm dreaming
            > when it comes to that. this is more than
            > likely going to be something the TV sits on,
            > Ohh hell I might even break down and build
            > it right into a TV stand.

            > any help or hints would be greatful. I think
            > it's just a case of too many ideas floating
            > around in my head all at once.

            > Rene D

            The Ascendant 6.5 sure looks good on paper. Is the FR actually that extended and flat? IS this really capable of playing flat from 45 to 6000 Hz? If so, why use a midrange at all?

            Does anyone have actual measurements of this driver?
            Don't listen to me - I have not sold any $150,000 speakers.

            Comment


            • #7
              Re: Center channel blues


              > The Ascendant 6.5 sure looks good on paper.
              > Is the FR actually that extended and flat?
              > IS this really capable of playing flat from
              > 45 to 6000 Hz? If so, why use a midrange at
              > all?

              > Does anyone have actual measurements of this
              > driver?
              I didn't mean flat, I meant +/-3db, but still. For a 35 dollar woofer, if the advertised FR is accurate, I may have a new favorite woofer.
              Don't listen to me - I have not sold any $150,000 speakers.

              Comment


              • #8
                Re: Center channel blues


                The bigest problems I'm seeing so far is that the MDM55 is shielded good enough to be placed right next to the TV, but if placed under it with a shielde tweeter on top, it should work fine. The Dayton DA135 is not shielded, so you probably don't want to go that route.

                Brian Walter

                Comment


                • #9
                  Re: Center channel blues


                  > I didn't mean flat, I meant +/-3db, but
                  > still. For a 35 dollar woofer, if the
                  > advertised FR is accurate, I may have a new
                  > favorite woofer.

                  They also seem to have some pretty decent subswoofers to, they have pleny of xmax. They have a little 8" sub with 15mm stright one way... For 45.00$
                  Sonds pretty nice to me...

                  Comment


                  • #10
                    Re: Center channel blues


                    It looks like Ascend is no longer selling their 6.5 midbass driver. Here's a thread on their site about it:

                    <A HREF="http://forum.carstereos.org/showthread.php?t=59898">http://forum.carstereos.org/showthread.php?t=59898</A>

                    Comment


                    • #11
                      Re: Center channel blues


                      Now I REALLY have the center channel blues..

                      Rene D

                      > It looks like Ascend is no longer selling
                      > their 6.5 midbass driver. Here's a thread on
                      > their site about it:

                      >
                      > <A HREF="http://forum.carstereos.org/showthread.php?t=59898">http://forum.carstereos.org/showthread.php?t=59898</A>

                      Comment


                      • #12
                        Re: Center channel blues *PIC*




                        Well from the looks of it Ascendant Audio is no longer making or selling the 6.5", So I'm going to have to go with my alternative. The Silver Flute shielded 6.5" 4ohm will work just as well.

                        I was wondering that about the MDM55, on how well it was shielded. I think I might try out one of the Hi-Vi dome mids they have. Still going to stick with the MDT40 for the tweet though. Since I'm already useing the MDT39 for my mains right now.

                        Rene D

                        > The bigest problems I'm seeing so far is
                        > that the MDM55 is shielded good enough to be
                        > placed right next to the TV, but if placed
                        > under it with a shielde tweeter on top, it
                        > should work fine. The Dayton DA135 is not
                        > shielded, so you probably don't want to go
                        > that route.

                        > Brian Walter

                        Comment


                        • #13
                          Re: Center channel blues


                          If this is for a home theater, you should try to voice-match your center channel to your mains as much as possible. Use the same mids-tweeters and the same crossover topology and hope for the best. Matching an MTM to a TMW can be difficult. Ideally you would use three perfectly matching speakers across the front stage (and for surround music, aficionados prefer matching speakers at all positions. For home theater the surrounds are less critical but should still voice-match the mains.)

                          Comment


                          • #14
                            Re: Center channel blues


                            That'll get done sooner or later. the 3-ways i have right now are going to be put in the computer room for music editing once the wife and move. that way I can make another set for the mains on the HT.
                            I still have a few months or so to finalize my center and stuff. I'm sure between now and then i'll go through a dozen diferent design ideas. you know how it goes *shrug*

                            Rene D

                            > If this is for a home theater, you should
                            > try to voice-match your center channel to
                            > your mains as much as possible. Use the same
                            > mids-tweeters and the same crossover
                            > topology and hope for the best. Matching an
                            > MTM to a TMW can be difficult. Ideally you
                            > would use three perfectly matching speakers
                            > across the front stage (and for surround
                            > music, aficionados prefer matching speakers
                            > at all positions. For home theater the
                            > surrounds are less critical but should still
                            > voice-match the mains.)

                            Comment


                            • #15
                              Re: Center channel blues


                              > It looks like Ascend is no longer selling
                              > their 6.5 midbass driver. Here's a thread on
                              > their site about it:

                              >
                              > <A HREF="http://forum.carstereos.org/showthread.php?t=59898">http://forum.carstereos.org/showthread.php?t=59898</A>

                              Now that's a true pi$$er... Perhaps they really were not all they were cracked up to be then.
                              Don't listen to me - I have not sold any $150,000 speakers.

                              Comment

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