Omni15TB with Dayton Audio PPA800DSP 2-Way Plate amp

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Shenk92
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Omni15TB with Dayton Audio PPA800DSP 2-Way Plate amp

#1 Post by Shenk92 » Fri Apr 23, 2021 6:14 am

Hello
I am getting ready to build a o15tb. I've purchased the dayton plate amp as suggested by bill in the forums. Now I would like to know what changes I should make to the crossovers in order to use the 2 separate channels on the amp. Thanks in advance!

Kind regards

Tjebbe

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Bill Fitzmaurice
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Re: Omni15TB with Dayton Audio PPA800DSP 2-Way Plate amp

#2 Post by Bill Fitzmaurice » Fri Apr 23, 2021 7:32 am

The amp's lowest crossover is 1kHz, the crossover to the midrange is at 400Hz, so you can't use the high frequency amp for the midrange, only for the tweeter. The .45mH coil and 5.6uF capacitor are eliminated from the midrange filter. The high pass filter for the tweeter is eliminated, replaced by a 10uF capacitor. The crossover frequency to the tweeter is 2.5kHz, so that's what you use as the DSP setting.

Bruce Weldy
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Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Omni15TB with Dayton Audio PPA800DSP 2-Way Plate amp

#3 Post by Bruce Weldy » Fri Apr 23, 2021 7:35 am

Shenk92 wrote:
Fri Apr 23, 2021 6:14 am
Hello
I am getting ready to build a o15tb. I've purchased the dayton plate amp as suggested by bill in the forums. Now I would like to know what changes I should make to the crossovers in order to use the 2 separate channels on the amp. Thanks in advance!

Kind regards

Tjebbe
The most important thing to know about that amp is that the high amp section has a built-in 1khz highpass.

I can't find any info in the crossover section of the plans about where the different drivers crossover, but I'm sure the only use for the high end of the amp will be the tweeter - regardless of whichever one you chose. You'll still have to build the lowpass and the bandpass.

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

Bruce Weldy
Posts: 7546
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Omni15TB with Dayton Audio PPA800DSP 2-Way Plate amp

#4 Post by Bruce Weldy » Fri Apr 23, 2021 7:36 am

Bruce Weldy wrote:
Fri Apr 23, 2021 7:35 am
Shenk92 wrote:
Fri Apr 23, 2021 6:14 am
Hello
I am getting ready to build a o15tb. I've purchased the dayton plate amp as suggested by bill in the forums. Now I would like to know what changes I should make to the crossovers in order to use the 2 separate channels on the amp. Thanks in advance!

Kind regards

Tjebbe
The most important thing to know about that amp is that the high amp section has a built-in 1khz highpass.

I can't find any info in the crossover section of the plans about where the different drivers crossover, but I'm sure the only use for the high end of the amp will be the tweeter - regardless of whichever one you chose. You'll still have to build the lowpass and the bandpass.
Dang it.....Bill answered while I was typing....

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

User avatar
Bill Fitzmaurice
Site Admin
Posts: 27597
Joined: Tue May 02, 2006 5:59 pm

Re: Omni15TB with Dayton Audio PPA800DSP 2-Way Plate amp

#5 Post by Bill Fitzmaurice » Fri Apr 23, 2021 9:24 am

Type faster.

Bruce Weldy
Posts: 7546
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Omni15TB with Dayton Audio PPA800DSP 2-Way Plate amp

#6 Post by Bruce Weldy » Fri Apr 23, 2021 9:56 am

Bill Fitzmaurice wrote:
Fri Apr 23, 2021 9:24 am
Type faster.
Actually, I had to go look at the plans first to make sure I didn't say something wrong......wouldn't want another crossover fiasco on my hands. :oops:

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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