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Pro-ject Head Box II - not working properly

post #1 of 2
Thread Starter 

Hi All

 

I have a Pro-ject Head Box II headphone amp which I am using with AKG550s.

Unfortunately I was rushing to set up and I inadvertently plugged the cable from

my laptop into the amplifier's output and not the input. I listened for a few minutes

before I noticed my mistake. I am now plugged into the input but unfortunately I am getting considerable

distortion when listening to music at anything beyond a medium volume.

 

Wonder if anyone else has made such a school boy error, and if there is a way I can repair the amp?

Any thoughts gratefully received.

 

Many thanks

Chris

post #2 of 2

It will help to have a schematic. From what I found, probably its OP's failure as there are no other semiconductors in amplifier part (I think). People say that replacing OP's with LM4562 gives a good sound. Again, having schematic will help (looks like its impossible to find it anywhere).

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