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Old school amp for auto, what parts do you recommend to rebuild ?

68.96.89.108
Posted on November 6, 2009 at 20:22:52
leguerre
Audiophile

Posts: 12
Location: So. California
Joined: May 26, 2003



I realize this is a site specifically for home stereo, but, this is the tweakers section and I am requesting help on what you suggest as audio/electronically knowledgeable members.
Ive purchased an old school amp which essentially is arounds 15 years old,they often have significantly better quality design than much newer amps.
They're often have better specifications which are realistic compared to overinflated specs of newer amps.
My intention is to replace "old" components which deteriorate over time so that I can have trouble free use for many years to come.
My intention is to replace at least the electrolytic caps with quality 105 degree caps . Do you recommend any other components to "rebuild" this one ?
I have enclosed a pix of my model amp.
Your suggestions appreciated.
Thanks

RE: Old school amp for auto, what parts do you recommend to rebuild ?, posted on November 7, 2009 at 10:05:35
FenderLover
Audiophile

Posts: 3308
Joined: July 31, 2007
Contributor
  Since: May 17, 2009
 If the unit works, I'd just change out the 'lytics and use the amp. How many watts is it rated at?

RE: Old school amp for auto, what parts do you recommend to rebuild ?, posted on November 7, 2009 at 13:51:00
clbeanz
Audiophile

Posts: 1687
Location: No.Ca.
Joined: March 2, 2004
 Looks like the guts of a Precision Power 2x75. I think they rated 75w 4-ohms and about 110 2-ohms.
sincerelybeanz
It would appear someone knows his innards !!!, posted on November 7, 2009 at 17:20:14
leguerre
Audiophile

Posts: 12
Location: So. California
Joined: May 26, 2003
 You are indeed correct that is a PPI 2075 model and it is 75 watts.
I know auto stereo questions are rarely discussed here. Thanks for the response.

I am assuming transistors age well ? Otherwise I will only change out the Capcitors.....

Thanks
RE: It would appear someone knows his innards !!!, posted on November 9, 2009 at 21:01:59
bassbinotoko
Audiophile

Posts: 88
Location: Vancouver Island
Joined: January 27, 2009
 Even the electrolytics may be just fine. I'd leave them alone, or maybe pull one from the hottest location, and test it. Nearly all the caps that I've seen fail were exposed to serious heat for long periods, like in a power supply next to a hot regulator.

"If it ain't broke, don't fix it" applies here.

RE: It would appear someone knows his innards !!!, posted on November 8, 2009 at 14:16:45
clbeanz
Audiophile

Posts: 1687
Location: No.Ca.
Joined: March 2, 2004
 I installed some well used PPI Sedona series 4 and 2 channels amps in a nephews truck a few years ago. Still good ...about 20 years.

Run it hard before buttoning up the install. The original 2075's were very quick and dynamic, they were great on decent front stage separates.

sincerelybeanz

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