I don't believe anything is wrong with your amp. As stated above, the ohms are too low for the amp to operate normally. I'd suggest selling the HLF and 118 and getting an 810 or two 410he cabs. You'll get enough volume to handle your guitarist and drummer AND it will have plenty of punch.It spreads out my sound more makes me sound more punchy. My guitarist and drummer are both very loud. I need it