No longer playing in bands so it’s time to move on my QSC power amp.This is a quality class AB amp. Specs can be found here - https://www.qsc.com/resource-files/productresources/amp/rmxa/q_amp_rmxa_specsheet.pdf I bought this amp second hand as an ex demo unit. It arrived in the condition you can see in the photos. for full disclosure when I first received the amp it slid off  my cab and landed on my knee which pushed on the channel 1 gain knob. This forced the pot open. I pressed th