OTop 12 Compression crossover

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lola_handycam
Posts: 1
Joined: Tue Mar 22, 2022 5:10 am

OTop 12 Compression crossover

#1 Post by lola_handycam »

Hi All

I am finishing my OmniTop 12 Build with compression horn loaded with the ASD-1001 Eminence compression.
I'll be using a DSP to filter frequencies for mid and hi
I'll be wiring a highpass protection capacitor for the compression.
The plans says to set the crossover to 2Khz but the compression specs says its usable range is 2500Hz-20kHz...
https://www.parts-express.com/Eminence- ... PI-290-525



I am using the eminence beta 12 for the Mid, and its frequency response says it can go up to 2500Hz "flat"
https://images.static-thomann.de/pics/a ... 140195.pdf

Why arent we setting the crossover to 2500Hz instead of 2000Hz ?

Thanks

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Bill Fitzmaurice
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Joined: Tue May 02, 2006 5:59 pm

Re: OTop 12 Compression crossover

#2 Post by Bill Fitzmaurice »

We can go to 2kHz because we use a 4th order high pass filter. The Beta 12 can go to 2.5kHz reasonably flat on-axis, but not off-axis. Also, the Eminence SPL chart wasn't measured in a horn.

Bruce Weldy
Posts: 8034
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: OTop 12 Compression crossover

#3 Post by Bruce Weldy »

Bill Fitzmaurice wrote: Thu Jun 30, 2022 8:32 am We can go to 2kHz because we use a 4th order high pass filter.
So make sure you use a steep drop off when you chose your crossover type.

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