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Old 1st April 2003, 05:08 AM   #1
diyAudio Member
Join Date: Apr 2003
Location: Tulsa, OK
Default Balanced Line Driver

I use a consumer reciever for my home theater needs. I use a Behringer feedback destroyer pro, however to act as a parametric equilizer for my subwoofer. I also use a prosound amplifier to power the subwoofer.

The output coming from my reciever is not very loud, and the level drops because of the equilization from the Behringer. So I want to make a line driver of a fixed gain of say 12dB to allow more output, and balance the line for the prosound equipment.

I looked at this balanced line driver, and thought it looked pretty much exactly what I need, except it only provides 6dB of gain. Is their any way I could cascade two of them to provide more gain? Its a limited bandwidth application, so sound quality isnt TOO critical, but I don't want it to alter the sound in any way.

I used its unbalanced brother the opa134 in a headphone amplifier designby Chu Moy over from with excellent results.

Does anyone have a skematic on how to make one? Thanks!
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Old 1st April 2003, 06:32 PM   #2
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Join Date: Sep 2002
Location: Ontario, Canada
Maybe these might provide a starting point:
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