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DIY Flat Panel Speaker Love

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  • giorgioPETALK
    replied
    in regard to tuning the DML panels how would you do it? thanks
    g

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  • Zene
    replied
    Brew... I want to try the Tectonic TEBM35C10-4 first; no good reason other than flat to 20k.
    Will be either a 3 or 4 way. All other exciters will be Dayton DAEX25'S. Good to about 8 -10k for crossing to BMR. Not concerned about hearing above that (old), just want to keep any high freq distortion from the 25's. I'm a firm beliver in eliminating as much dopler distortion as possible.
    Only changing panels' size and materials.
    OB woofer (Klipsch 15). Active 4 way crossover for versitility. No high spl output needed. NO eq ever, never, nada. Stuborn and old school. A lot of times it's the room, not the speaker.
    On 3 or 4, will try to do 3 first; If not satisfactory can do one larger panel and one small. Still using the 25's for both. Means the crossover point should be flawless.
    Keep posting progress. Some of us need all the input possible as you can tell by the # of posters we are a dying breed. I was hoping to spark some opposition from the dyed in the wool full range guys. Pushing any speaker to it's limits is not the answer.
    Heed Unb...'s panel recommendations (post #1179).

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  • Unbiasedsound
    replied
    Originally posted by Brewster56 View Post
    Thanks for the EPS supplier link, Unbiased. I talked with a foam manufacturer who has Type IV EPS 1.8 lbs/cubic foot, which is equivalent to the 30 grams/liter for the ultra dense on the UK website. This manufacturer also makes Type XV which is 3 lbs/cubic foot. Do you think that even the higher density as that would be better still? I am going to make a hot wire cutter to make whatever thickness I need. I also asked him about aged EPS, which is used on EIFS stucco. It is aged for 6 weeks, so it can finish outgassing, to minimize shrinking. This would likely be best to do with our DML's before sealing them.
    I don't really worry about the aging as by the time the EPS is made and ships to my door step its almost close to 6 weeks. lol
    Last edited by Unbiasedsound; 07-29-2019, 12:08 AM.

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  • Brewster56
    replied
    Originally posted by Zene View Post
    Unb ... now you're talking my language moving off the beaten path. Can't wait for results and pics. My 4 way is moving slowly (very). Oddly is almost opposite; cone bass, DML upper bass, DML mid and BMR tweeter.


    Zene, What BMR tweeter are you planning on using? Will you be running it full range or cross it over at what frequency? I am running 19 x 32" x 1 EXP 150 from 300 hz and up, with ob cone bass below 300. I want some direct sound (a little more presence) and better highs, without needing so much EQ, from another driver - thinking a BMR would blend well.Thanks.

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  • Brewster56
    replied
    Thanks for the EPS supplier link, Unbiased. I talked with a foam manufacturer who has Type IV EPS 1.8 lbs/cubic foot, which is equivalent to the 30 grams/liter for the ultra dense on the UK website. This manufacturer also makes Type XV which is 3 lbs/cubic foot. Do you think that even the higher density as that would be better still? I am going to make a hot wire cutter to make whatever thickness I need. I also asked him about aged EPS, which is used on EIFS stucco. It is aged for 6 weeks, so it can finish outgassing, to minimize shrinking. This would likely be best to do with our DML's before sealing them.

    Leave a comment:


  • Unbiasedsound
    replied
    Originally posted by a4eaudio View Post

    Based on some other comments in other threads, it seems if you try to edit your post twice it thinks it is Spam and basically disappears. (I don't know if you tried editing it, but that is one possibility.)

    Ah I see, yea I did edit my post twice so that's probably what happened, thanks a4eaudio....At first I thought someone was flagging my post intentionally but I see my post (1179) that was deleted back up again.

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  • a4eaudio
    replied
    Originally posted by Unbiasedsound View Post
    WTF??? I hope that was an error as it said my post was marked and flagged as spam? If so I wont be giving out advice on this subject/topic.
    Based on some other comments in other threads, it seems if you try to edit your post twice it thinks it is Spam and basically disappears. (I don't know if you tried editing it, but that is one possibility.)

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  • bradley.s
    replied
    Has anyone tried to build a DML subwoofer with the bass shaker? https://www.parts-express.com/dayton...watts--295-244

    Probably have to do it like a down firing subwoofer.

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  • Unbiasedsound
    replied
    WTF??? I hope that was an error as it said my post was marked and flagged as spam? If so I wont be giving out advice on this subject/topic.

    Leave a comment:


  • Unbiasedsound
    replied
    Best size and thickness is what ever you want it to be.
    Last edited by Unbiasedsound; 07-24-2019, 09:37 AM.

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  • jeremyb
    replied
    Ahhhhh cool, thanks for that, might have to revise my plans!!

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  • Unbiasedsound
    replied
    That particular exciter would be more then sufficient.....The problem with that small of a panel size is that it wont have much bass response....Panels need to be at least 16inchs minimum before any real bass frequencies can be heard and more preferable in the 2ft. size.

    The only down fall to full range DML panels is that it needs to be large enough to produce the lower end frequencies......The only other way is to use very small panels with a separate sub woofer to fill in the low end.

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  • jeremyb
    replied
    Hi all, complete newbie here, I've got a couple of DAEX32EP-4 thrusters coming that I want to make into a pair of bookshelf style speakers, would a 12" X 12" panel be sufficient for an exciter like this?

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  • Zene
    replied
    Glad they have small qty's, thanks!

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  • Unbiasedsound
    replied
    More specific
    Last edited by Unbiasedsound; 07-24-2019, 09:35 AM.

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