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  • allenb
    replied
    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.

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  • Unbiasedsound
    replied
    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.

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  • allenb
    replied
    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.

    https://www.parts-express.com/100-Hz...ssover-266-446

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  • Unbiasedsound
    replied
    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.

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  • allenb
    replied
    Originally posted by Unbiasedsound View Post
    No I have not but I do use a 125uf electrolytic cap 1st order which is around 160hz.
    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.

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  • Unbiasedsound
    replied
    No I have not but I do use a 125uf electrolytic cap 1st order which is around 160hz.

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  • allenb
    replied
    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.

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  • Unbiasedsound
    replied
    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.

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  • Unbiasedsound
    commented on 's reply
    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.

  • pixelphoto
    commented on 's reply
    I just found the answer. Thanks for your help, I really appreciate it.

  • pixelphoto
    commented on 's reply
    I understand that but I thought there was a formula using 5ths such as 2/5, 3/5, etc.

  • Unbiasedsound
    commented on 's reply
    You can place them any where that sounds good to you as its all personal preference. Some prefer dab smack in the middle of the panel while others prefer slightly off center while others prefer angles or corners, again its personal preference.

    Place the exciter on the panel and move it around until you find the spot that sounds best to you then mark it and mirror the other panel.

  • pixelphoto
    commented on 's reply
    Where exactly do I place the exciter on the panel?

  • Unbiasedsound
    commented on 's reply
    What measurements?

  • pixelphoto
    replied
    I just made panels measureing 12" X 24". Please help this math handicapped one with the measurements for exciter placement.

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