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Understood and makes sense. What have you found is best to use for gluing the foam to frame and panel?
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PVA wood glue like Tightbond or Elmers
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Do you know if frost king makes a foam weather stripping in the size you mentioned without adhesive on either side. Was thinking it would be easier to install and for the pva glue to adhere to the foam weather stripping alone.Comment
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I dont think so but I am not totally sure. The Frost King foam I use only has one side that has the sticky adhesive.Comment
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Do you utilize the adhesive on that side and use pva on the non-adhesive side?Comment
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Yes....I have used both sides with glue before but just as long as the surface contact area is smooth/clean the sticky adhesive works really well.Comment
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I just made panels measureing 12" X 24". Please help this math handicapped one with the measurements for exciter placement.Comment
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I understand that but I thought there was a formula using 5ths such as 2/5, 3/5, etc. -
I just found the answer. Thanks for your help, I really appreciate it. -
OH the 2/5 3/5 placement. You can use that placement but trust your ears and move them around the 2/5 3/5 as even 1 inch can make a big difference. For me I prefer them more in the center line instead of in the corners and or edges.
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Measuring Sound Across My DML Panels - YouTube
If you watch this vid on exciter placement as I said many times before the ideal placement of a single exciter is dab smack in the middle just like a conventional cone driver.Comment
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I'm still collecting parts after a delay in getting started. Styrofoam ordered for doing 9 1/2 x 14 panels and TEAX19C01-8 exciters. Question on impedance curve for passive crossover calculations. Have you determined the impedance of a 9 1/2 x 14 x 1/2" panel coupled with the TEAX19C01-8 at frequencies below 500 hz. I noticed the unmounted driver's resonance and impedance spike occurs around 350 hz but obviously would drop to a lower frequency once attached to a panel. Was curious to know for crossover calculations for a cross at somewhere between 150 and 200 hz.Comment
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No I have not but I do use a 125uf electrolytic cap 1st order which is around 160hz.Comment
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That should work for me as well. I'm assuming going 1st order at such a low frequency shouldn't compromise power handling like it would a conventional cone driver. Do you have any affordable woofer crossover options with air core inductors being prohibitively expensive? Copper is outrageously expensive. Looks like the Jantzen for a cap that big is around $60 each.Originally posted by Unbiasedsound View PostComment
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I use these at around 10 bucks each so $20.00 for a pair. 800 Hz Low Pass 8 Ohm Crossover (parts-express.com) The P.E. crossovers utilize butterworth type while Dayton uses Linkwitz. But for my application the Butterworth sounds better.Comment
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I didn't realize PE had assembled crossovers. Looks like a nice selection. I think the 100 hz low pass might be the one for me to try for the cone woofer I'll be using. I'm hoping the 6 x 14 panel will drop down low enough to blend successfully with the woofer crossing at 100. I want to have the panel play the dominant role in the very low mids up through what ever it will go up to.
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Although the panel can play 100hz it will be at a lower db as it starts to drop sharply at around 100hz. This is the reason I use the P.E. 800hz low pass as the woofer will cover lower mids while the DML handles the high mids to high frequencies. Plus the higher the DML panel is crossed the less strain on the exciter.Comment
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That makes sense. Do you know if P.E. can sell the laminated core inductors used in their crossovers? I would like to experiment with a second order 400 hz low pass but is not one offered in an assembled crossover. Everywhere I've looked for inductors whether air core or iron/ferrite, the prices are way higher than what P.E. sells their 2nd order crossovers.Comment
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