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Midwest Audio Fest

It’s that time audio enthusiasts! Registration for the 2019 Speaker Design Competition is now open! Visit midwestaudiofest.com for details and to list your speaker project. We are excited to see all returning participants, and look forward to meeting some new designers this year, as well! Be sure your plans include a visit to the Parts Express Tent Sale for the lowest prices of the year, and the Audio Swap Meet where you can buy and trade with other audio fans. We hope to see you this summer! Vivian and Jill
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DIY Flat Panel Speaker Love

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  • They look good. Once I figure out what I'm doing on regular speakers I'm going to give flat panels a shot. I look forward to seeing how you wind up dampening them.

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    • Guys ...Don't forget pb types propogate more sound than say mdf as it is more flexible. Damping, if you remember, is not my first choice. The stiffer you can make it the less it will transmit sound. A "T" or I-beam shape does just that. Ultimate would be triangle shaped, but prob not worth the effort. Laminating different matetials only adds to the vibrating mass. It lowers the frequency, but does not go away

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      • Be nice to know how to cancel?

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        • Unb ... your 16" x 24" 1" XPS panel (no treat) with a DAEX 25 has a very impressive graph. I need a low output (no bass) panel. Do you still recommend that combination or might I go smaller with same exciter? Sanding is difficult here in apt.

          .

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          • No bass? All exciters run full range so there will be some bass...if you want no bass the only way to do it is to use a crossover....as for low output the smaller exciters have less bass output then the bigger exciters.

            Thicker panels have less bass then thinner panels so panels 2inchs and over will have less bass then a 1inch panel.

            The smaller the panel the sound becomes more focus but less full sounding because there will be less bass.

            Are you sanding indoors????? That is a no no because the fine dust particles can be very hazardous to your health especially if it gets into your lungs.....Always sand outdoors with a filter mask on and eye protection as the fine dust can even go into your eyes.....Also if possible use a shop vac to suck up the dust while you are sanding.

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            • Unb... I want to use the 25's because of their higher frequency response. Sanding will not be an option under any circumstances. That is why I'm asking about the combination quality. I can take care of the bass. I would try different panel sizes and types.

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              • What frequency range are you going to use the 25's?

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                • Unb ... aiming for around 300hz, which is a safe frequency for my OB woofer. And, that puts the panels to carry the critical 300hz to 3khz.

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                  • My Bastat panels have great mid range frequencies and they are 12inchs width X 16inchs height X 1/2inch thick. You can try that size to see if it sounds to your liking.

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                    • Are your 1/2 " panels XPS?
                      I do have some small bamboo ones to try. Ordering balsa as well. I plan on trying many and larger ones, too. To be proven, but sure larger panels even cutoff on bottom end could exhibit better upper bass response.

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                      • Regarding fine air particulates -- in general -- this DIY filter is a good option. https://www.youtube.com/watch?v=kH5APw_SLUU

                        I have a Foobot indoor air quality sensor plus the Dylos fine particle sensor. That cheap box fan knocks down larger particles fast and the smaller ones over time (apprx 24 hours.) However, I tape on a 20x20x4 furnace filter instead of a one inch. Clean air will keep your heart ticking.

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                        • Originally posted by Zene View Post
                          Are your 1/2 " panels XPS?
                          I do have some small bamboo ones to try. Ordering balsa as well. I plan on trying many and larger ones, too. To be proven, but sure larger panels even cutoff on bottom end could exhibit better upper bass response.
                          No, they are EPS which is Expanded Polystyrene.....EPS seems to have warmer tones then XPS.

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                          • Good, I have some EPS that doesn't look flakey.
                            I'll try it.

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                            • It needs to be the higher harder density/grade EPS....The more common standard readily available EPS is used for insulation and or packing as these are low to medium grades which can sound muddy due to it being to soft....The higher grades are not as common and harder to find in your local hard ware stores.....I order mine off of ebay.

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                              • Higher grades of EPS are 3 and 4 lb density. Ads are not showing. Can you supply guide to the better stuff?

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