Hi, I have been having a problem with my 100DFX amp and just came across this forum so thought I would ask if anyone could help me. On and off now for quite a long time the volume decides to reduce on the amp by itself, losing power. I then turn it up but when it returns to full volume it blasts out! I have tried a different guitar/leads but it definitely seems to be the amp as it still does it. I don't have anything else plugged into the amp just the guitar through the input socket and all the settings are the same as they were prior to this problem starting (the amp is about 6 years old). Anyone know why the amp would do this? Thanks in advance for any help.