[Chris85]

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

 

[banem0230]

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).