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Old 23rd March 2014, 02:57 AM   #1
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Default Pioneer amp board with IC drivers.

This board was salvaged from a Pioneer VSX-D1S receiver. Thought I'd wire it up and give a listen. It sounds surprisingly good. The transformer was from some Logitech speakers and the rectifier/capacitor board was from the same receiver. Gives me about +/-28vdc.

The amp uses a uPC1270 driver IC rated at .003% THD. Pioneer specs on the amp are 25w/ch into 8 ohms @ .005% THD.

The uPC1270 is rated to +/-36vdc with a max output voltage of 23v.

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Old 23rd March 2014, 10:16 AM   #2
Mihkus is online now Mihkus  Estonia
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with IC front and and bias network its a chipamp?
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Old 23rd March 2014, 02:08 PM   #3
jaycee is offline jaycee  United Kingdom
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Marantz also used to use this chip. It's not bad at all. However, it is now obsolete.
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Old 23rd March 2014, 08:03 PM   #4
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Quote:
Originally Posted by Mihkus View Post
with IC front and and bias network its a chipamp?
Chipamp with a current follower?
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