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Class D Switching Power Amplifiers and Power D/A conversion

Lepai LP-2020 mod to include sub out
Lepai LP-2020 mod to include sub out
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Old 11th February 2011, 06:31 PM   #1
rziebro is offline rziebro  United States
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Join Date: Dec 2009
Default Lepai LP-2020 mod to include sub out

I have been searching but unable to find any info on a mod to include incorporation of a sub out circuit for a Lepai LP-2020 (TA2020 chip) to feed a powered subwoofer. Maybe a simple opamp circuit providing a lopass filter and buffering, tapping into the existing circuit between the volume control and the input caps. I play keyboard ocassionally for small gatherings and am presently using this amp with acceptable results. However my thinking is I could use a available sub to handle the bass which would allow me to crank down the bass being sent to my two Advent indoor/outdoor speakers thus reducing the stress on the amp and freeing more drive for the Advents. Thank you for your replies.
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Old 12th February 2011, 04:01 PM   #2
Tripath07 is offline Tripath07  United States
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Join Date: May 2006
Hi,

Just plug in the speaker cables that are going out of the Lepai, and plug them into the SUB speaker in's. Then grab a second pair of cables and plug them into the SUB speaker out's, and run them to your Advent's.

It should work great, Let me know.
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