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Distorted sound in Parasound A23 power amplifier

Hi!

I have bought a used Parasound A23 power amplifier and the sound is distorted. I have connected different preamps with the same distorted sound. What is wrong? Is there a problem with the amp, the preamp or the source component? My standard setup (integrated amp and speakers) is working normal.

 

thanks for replay!

eboymusic
russ69's avatar
russ69
3,501 posts
 

Really hard to guess on this one. My guess would be the amplifier, or you are overloading the input of the pre-amp. What is your source and what voltage output does it have?  

eboymusic OP
5 posts
 

I have tried Mdac+ which got output voltage 4.5Vrms ±0.1 (balanced) and output impedance 20ohm (balanced). I know that this is a dac but it should also work as a preamp. I have also tried preamp output from CXA80 integrated amp (unbalansed), I didnt found the output voltage. Same distortion on both. Im not an expert on power amplifiers 😉 Im feeding the dac with upsampled dsd audio signals using a computer and hqplayer.

eboymusic OP
5 posts
 

I dont have distorted sound using the CXA80 integrated amp and Mdac+ connected to a computer with USB-B. The voltage output of USB-B is 5V.

jjss49's avatar
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jjss49
6,612 posts
 

your amp is broken

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