Hi,
thanks for replying, to answer your question yes the destortion does appear on both left and right channels.
This is my first time on Yahoo groups and i made two topics by mistake. I didn't know it takes some time to appear. I've had a couple replys in the other topic
https://groups.yahoo.com/neo/groups/AN1x-list/conversations/messages/13142 They mention that it maybe a problem with jfets. i'm currently looking into it.