I have got 2 problems with my head ht-5R. One of these is when ı am playing guitar in clean tone amp can easily get overdrived and ı got really low output than channel 2. Other problem is when ı put the cable in send or return the amp is making noise.I am living in Turkey so we havent got any service. I bought that amp 2.handed so i dont think there is a warranty about it. Is there anyone having/had this problems?