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DIY Flat Panel Speaker Love

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  • Re: DIY Flat Panel Speaker Love

    "This is exactly it. The thin leads from the exciter to voice coil breaks. I have had better luck with the Thruster than the Ultra but they both appear to suffer from this issue. The leads are solid copper and not flexible,woven tinsel leads like we see on the DAEX30HESF-4. "

    Seriously? Thats just nuts. No-one makes any sort of loudspeaker driver with solid leads instead of braided. Its just guaranteed to break. Hopefully all of the returns will make them rethink and fix this.

    Comment


    • Re: DIY Flat Panel Speaker Love

      I was told that they were working with the factory on the construction of the Ultras and hope the Thrusters too. The Thrusters also sound very good on XPS and Ply.

      I'm going to try the DAEX30HESF next... looks like it's constructed wel and should be robust...

      Comment


      • Re: DIY Flat Panel Speaker Love

        Originally posted by rmeinke View Post
        I had to laugh a little Kornbread... your first panel was solidly clamped between a solid wood frame now on this one seems to float in the air with strings and is as little damped as possible me thinks. :-)

        All good learning though...
        IMO, allowing the first exp panel to move more freely vs solidly mounted helped somewhat even out frequency response, but, it seem the largest factor in evening out frequency response was gluing the exciter to a brace.

        How do you hold the exciter solidly and let the panel sit in free air?

        If time allows and this one keeps playing I have to figure out a way to mount the cardboard solidly enough it stays in a neutral (not pulling, up, down, back, etc.) position in relation to a solidly mounted exciter.

        Yes, the exp frames may get re-purposed and something resembling the first exp panel 'with tabs' may arise.

        It might also help if someone *hint* would model that size cardboard, snap a screenshot of the null points, so the tabs could be placed more accurately.


        The lacquer has not dried completely yet, after it stops stinking it should be dry and I do expect some change in response.
        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

        Comment


        • Re: DIY Flat Panel Speaker Love

          Anyone tried the Techtonic Elements TEAX25C10-8/HS? Less power, but the leads are exposed and look like they might last.

          Comment


          • Re: DIY Flat Panel Speaker Love

            Originally posted by Gary.M View Post
            Anyone tried the Techtonic Elements TEAX25C10-8/HS? Less power, but the leads are exposed and look like they might last.
            PE has this, more power ??? Supposed to handle 20 watts. Tectonic Elements TEAX32C20-8 32mm Self Supported Exciter 8 Ohm

            The frog solves having to support the panel to keep the panel in a neutral position related to the solid mounted exciter. They both have woven leads. Power handling is only 10 watts. Tectonic Elements TEAX25C10-8/SP 25mm High Power 8 Ohm Frog Exciter
            Last edited by Kornbread; 12-07-2015, 08:57 PM.
            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

            Comment


            • Re: DIY Flat Panel Speaker Love

              Originally posted by Gary.M View Post
              Anyone tried the Techtonic Elements TEAX25C10-8/HS? Less power, but the leads are exposed and look like they might last.
              I have 2 pairs of the TEAX25C10-8/SP (will be taking off the plastic housing) ready for a 2 panel/side array... my next build actually and hope to make some good progress this weekend so hope to report back fairly soon.

              Comment


              • Re: DIY Flat Panel Speaker Love

                Originally posted by Kornbread View Post
                PE has this, more power ??? Supposed to handle 20 watts. Tectonic Elements TEAX32C20-8 32mm Self Supported Exciter 8 Ohm
                Yes I looked at that one but it has two concentric rings that mount, one to the body, the other to the driven element. Not sure how that would work to excite the panels we are using.

                The frog version is the same as the one I listed but with the plastic frog housing added.

                Comment


                • Re: DIY Flat Panel Speaker Love

                  Originally posted by rmeinke View Post
                  I have 2 pairs of the TEAX25C10-8/SP (will be taking off the plastic housing) ready for a 2 panel/side array... my next build actually and hope to make some good progress this weekend so hope to report back fairly soon.
                  OK, I wait with interest. These could be used as a pair per panel placed close to each other at the appropriate location on the panel.

                  Comment


                  • Re: DIY Flat Panel Speaker Love

                    Originally posted by Kornbread View Post
                    PE has this, more power ??? Supposed to handle 20 watts. Tectonic Elements TEAX32C20-8 32mm Self Supported Exciter 8 Ohm

                    The frog solves having to support the panel to keep the panel in a neutral position related to the solid mounted exciter. They both have woven leads. Power handling is only 10 watts. Tectonic Elements TEAX25C10-8/SP 25mm High Power 8 Ohm Frog Exciter
                    I always wonder about self supported exciters?!? Has to have an impact on sound quality and freq. response... and it would likely not be good... !?!?!?

                    Comment


                    • Re: DIY Flat Panel Speaker Love

                      Originally posted by Gary.M View Post
                      OK, I wait with interest. These could be used as a pair per panel placed close to each other at the appropriate location on the panel.
                      I am still sticking to the purist approach with 1 exciter per panel but 2 panels per side to get the increased surface area.

                      Have never tested with multiple exciters per panel but technically there will be cancellations at higher frequencies so have always adhered to 1 per panel. Ahhh, so many different configurations and approaches to test that its hard to try them all... maybe one of these days I'll try a classic Monacor placement with multiple exciters!

                      Comment


                      • Re: DIY Flat Panel Speaker Love

                        Originally posted by rmeinke View Post
                        I was told that they were working with the factory on the construction of the Ultras and hope the Thrusters too. The Thrusters also sound very good on XPS and Ply.

                        I'm going to try the DAEX30HESF next... looks like it's constructed wel and should be robust...

                        So far PE has been good about replacing, including shipping. On a product that sells for $20, they are probably loosing money doing this.

                        In a recent reply from PE, "Dayton is aware of the issue that was reported about the leads and as far as I know they are looking into it."

                        Hopefully it gets fixed.

                        What about modifications of the DAEX32EP-4? I doubt it's possible, but is there a way to place a woven lead between the terminal and voice coil?


                        Just an FYI; Picked up one of their Dayton Audio DTA-120 Class T Mini Amplifier 60 WPC for part of boy's Christmas. Of course it had to be tested upon arrival; I don't give, or sell, audio products that don't meet my approval to anyone.

                        The thing is sweet.

                        Currently there resides a pair of Apogee Calipers, Carver Amazing Loudspeakers, 2 pairs of NHT 2.5i's, pair of NHT super zeros, Wharfdale Opal30, Mirage FR5. Amps include Acurus a200x3, Carver av705x, NAD 2100, Marants sr6400ho <yes it's an av integrated but it still sounds pretty darn good.

                        The amp mated beautifully with the NHT 2.5i, Wharfdale, and Mirage speakers, sounding way better than a cheap little munchkin amp should. Never tried it on the Apogee or Carver, they are notoriously hard on amps and with only a realistic 30 watts per channel it just wasn't going to end well. If anything the amp erred on the polite side in the treble but had a tight, taught, clean and low bottom end that belied its size, the mids could be very slightly recessed but overall great, a relaxed easy to listen to type of sound. Placing performers anywhere in the sound-stage was not a problem here.

                        This would be an ideal amp to drive these panels ... or whatever you have.


                        https://www.parts-express.com/dayton...-wpc--300-3800
                        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

                        Comment


                        • Re: DIY Flat Panel Speaker Love

                          Originally posted by Kornbread View Post
                          So far PE has been good about replacing, including shipping. On a product that sells for $20, they are probably loosing money doing this.

                          In a recent reply from PE, "Dayton is aware of the issue that was reported about the leads and as far as I know they are looking into it."

                          Hopefully it gets fixed.

                          What about modifications of the DAEX32EP-4? I doubt it's possible, but is there a way to place a woven lead between the terminal and voice coil?
                          I find absolutely no issues with PE support... they have stood behind all of there products each and every time and the reason I get absolutely everything I can from them.

                          Comment


                          • Re: DIY Flat Panel Speaker Love

                            Originally posted by Kornbread View Post
                            Just an FYI; Picked up one of their Dayton Audio DTA-120 Class T Mini Amplifier 60 WPC for part of boy's Christmas. Of course it had to be tested upon arrival; I don't give, or sell, audio products that don't meet my approval to anyone.

                            The thing is sweet.

                            Currently there resides a pair of Apogee Calipers, Carver Amazing Loudspeakers, 2 pairs of NHT 2.5i's, pair of NHT super zeros, Wharfdale Opal30, Mirage FR5. Amps include Acurus a200x3, Carver av705x, NAD 2100, Marants sr6400ho <yes it's an av integrated but it still sounds pretty darn good.

                            The amp mated beautifully with the NHT 2.5i, Wharfdale, and Mirage speakers, sounding way better than a cheap little munchkin amp should. Never tried it on the Apogee or Carver, they are notoriously hard on amps and with only a realistic 30 watts per channel it just wasn't going to end well. If anything the amp erred on the polite side in the treble but had a tight, taught, clean and low bottom end that belied its size, the mids could be very slightly recessed but overall great, a relaxed easy to listen to type of sound. Placing performers anywhere in the sound-stage was not a problem here.

                            This would be an ideal amp to drive these panels ... or whatever you have.


                            https://www.parts-express.com/dayton...-wpc--300-3800
                            Hey KB, welcome to class D amps my friend. I have a modded Sure amp board that bested all of my vintage amps including my Densen Beat B100, a Sumo Ulysses (I really like Sumo amps have owned or auditioned many over the years) and a host of other vintage amps that have come through my listening room. As a matter of fact, it was only until recently that its been displaced as my best sounding amp. I picked up a near perfect Luxman LV-105U and have to say that I am very impressed with the Luxman and will be looking for more Luxman to try.

                            But have to say I've been hesitating buying amps over the last year+ because these little class D board sound SOOOoooooo good. I've had the Lepai LP7498E but that was not impressive (smooth but somewhat dark, lacking in clarity and bass definition) as I had hoped; especially considering the Stereophile Class D recommendation. I will have to try the DTA-120 sometime... always looking for inexpensive audio component to recommend to friends and family so will be adding this one to my list.

                            Comment


                            • Re: DIY Flat Panel Speaker Love

                              Re-posting from the NXT Thread over at AC...

                              NOTE: Soundcard and mic settings in REW were lost (back to defaults) and as a result the measurements are NOT accurate.

                              Measurements at 1 Meter with panels pulled out into the room. REW + UMIK-1 from MiniDSP.

                              These taken with the same power level comparing the Thruster exciter on 24"x30" XPS and birch ply.

                              I'm surprised by the sensitivity differences; thought it would be closer:
                              Click image for larger version

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                              Changed the power levels so the freq. response levels matches fairly close for comparison purposes. Green = 1/8" Ply | Purple = 1" XPS:
                              The ply is not as smooth as I thought it would be but is more extended and nearly on par if not smoother in relation to the mid-range.
                              Click image for larger version

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                              Distortion plots:
                              XPS 1M - Smoother distortion plot but slightly higher than the ply.
                              Click image for larger version

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                              Ply 1M - Matching level. A tad lower in dist but larger spikes.
                              Click image for larger version

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                              Under construction... will add more measurements and comments...
                              Last edited by rmeinke; 12-29-2015, 06:04 PM.

                              Comment


                              • Re: DIY Flat Panel Speaker Love

                                Another repost...

                                Thrust on 24"x30" XPS vs KEF Q500, 1 Meter, same mic position.

                                Click image for larger version

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