Hi, I've just finish my M15Mki amp.
All the tensions are good and the sound is good. But when I want to turn the volume (on the both channel) more than 3 quarter there is some big noise (like cracks) like a bad connection in the guitar's jack (but there isn't, I've check it).
The HP is new and works with other amps and and guitar also.
All connections on amp seems to be good so I would like to know if you have an idea about the origin of my problem.