Adding Preouts to a Pioneer Receiver

LightwaveDude · 10th July 2007, 03:41 AM

Is it possible to take my VSX-515-K and add pre-amp outputs to it? I would like to run some pro audio amplifiers for increased headroom and lowered noise floor (the integrated amplifier is really noisey). However, I don't have the money to buy a new receiver just because I want pre-outs. Is there a fix for this?

sam9 · 10th July 2007, 03:50 AM

No way to answer without a schematic and a service manual.

LightwaveDude · 10th July 2007, 03:54 AM

are they available anywhere?

sam9 · 10th July 2007, 04:22 AM

Maybe. Try the Pioneer website. Look for service. Also try "googling".

Even if you find, them it's hard to say in advance how tricky it will be, Could range from really simple to totally impractical. One problem sound simply be lack of space to install a pair of RCA jacks. Recievers are often packed pretty tight.

Anyway the idea is good.

owdi · 13th July 2007, 10:17 PM

I used the speaker outputs to feed my power amp, with a voltage divider. It sounded worse to my ears, and created a 60hz hum. The receiver was the Pioneer VSX-D509S.

Attached is a harmonic distortion sweep of the VSX-D590S. Not terrible, but not great either.

Dan

sam9 · 14th July 2007, 12:50 AM

Quote:

I used the speaker outputs to feed my power amp, with a voltage divider. It sounded worse to my ears, and created a 60hz hum.

Distortion is cumulative. You have the output (including distortion) of the AVR as the input to a second power amp which adds a little more distortion.

The buzz is probably some sort of ground loop.

10th July 2007, 03:41 AM	#1
LightwaveDude diyAudio Member Join Date: Nov 2005	Adding Preouts to a Pioneer Receiver Is it possible to take my VSX-515-K and add pre-amp outputs to it? I would like to run some pro audio amplifiers for increased headroom and lowered noise floor (the integrated amplifier is really noisey). However, I don't have the money to buy a new receiver just because I want pre-outs. Is there a fix for this?

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10th July 2007, 03:50 AM	#2
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	No way to answer without a schematic and a service manual.

10th July 2007, 03:54 AM	#3
LightwaveDude diyAudio Member Join Date: Nov 2005	are they available anywhere?

10th July 2007, 04:22 AM	#4
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	Maybe. Try the Pioneer website. Look for service. Also try "googling". Even if you find, them it's hard to say in advance how tricky it will be, Could range from really simple to totally impractical. One problem sound simply be lack of space to install a pair of RCA jacks. Recievers are often packed pretty tight. Anyway the idea is good.

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