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Old 10th July 2007, 02:41 AM   #1
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Default 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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Old 10th July 2007, 02:50 AM   #2
sam9 is offline sam9  United States
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No way to answer without a schematic and a service manual.
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Old 10th July 2007, 02:54 AM   #3
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are they available anywhere?
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Old 10th July 2007, 03:22 AM   #4
sam9 is offline sam9  United States
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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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Old 13th July 2007, 09:17 PM   #5
owdi is offline owdi  United States
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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
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File Type: jpg pioneer -40 steps.jpg (70.8 KB, 67 views)
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Old 13th July 2007, 11:50 PM   #6
sam9 is offline sam9  United States
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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.
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