another performance teknique

timwebb · 29th May 2010, 05:05 PM

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

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?

29th May 2010, 05:05 PM	#1
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	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?

30th May 2010, 03:49 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Changing the volume on the head unit causes the woofer to pulse? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

30th May 2010, 04:06 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Does it do this with the crossover set to full range, high pass and low pass? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

30th May 2010, 04:16 AM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Can you post a photo of the inside of the amp (showing the entire end of the board near the RCA jacks)? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

30th May 2010, 05:19 AM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Those look like 9 pin op-amps. Do any have more than a fraction of a volt of DC on pin 2 or 8? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links


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29th May 2010, 11:57 PM	#2
bob91343 diyAudio Member Join Date: Mar 2010	What amplifier is this? If it's direct coupled you may be introducing some dc at its input.

30th May 2010, 12:46 AM	#3
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	performance teknique 1200w 2ch

30th May 2010, 03:51 AM	#5
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	no just when i adjust the gain it pushes and pulls the sub.

30th May 2010, 04:08 AM	#7
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	low pass

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