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timwebb 29th May 2010 05:05 PM

another performance teknique
ok i have another one of these amps and ive changed the output transistors but when i turn the volume up and down the sub pull and pushes out?

bob91343 29th May 2010 11:57 PM

What amplifier is this? If it's direct coupled you may be introducing some dc at its input.

timwebb 30th May 2010 12:46 AM

performance teknique 1200w 2ch

Perry Babin 30th May 2010 03:49 AM

Changing the volume on the head unit causes the woofer to pulse?

timwebb 30th May 2010 03:51 AM

no just when i adjust the gain it pushes and pulls the sub.

Perry Babin 30th May 2010 04:06 AM

Does it do this with the crossover set to full range, high pass and low pass?

timwebb 30th May 2010 04:08 AM

low pass

Perry Babin 30th May 2010 04:16 AM

Can you post a photo of the inside of the amp (showing the entire end of the board near the RCA jacks)?

timwebb 30th May 2010 04:58 AM

2 Attachment(s)
here they go

Perry Babin 30th May 2010 05:19 AM

Those look like 9 pin op-amps. Do any have more than a fraction of a volt of DC on pin 2 or 8?

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