I bought an used Coda from a TBer a couple of weeks ago. It arrived with minor damage in transit(FedEx.. ), however I liked it much. The sound was beautiful. However, the problem is I couldn't get a good volume out of it. If I set both input gain and master pass around 12 o'clock, it starts farting so bad - it just gets overdriven. I plugged in 4 different basses - a DB with Underwood, an EUB with piezo pickup and electric basses(passive/active), so I don't think it is the bass problem. Of course the output levels from different basses varied, but at some point the amp cannot handle it no matter which bass I plug in. I set all the EQs flat and never turned gain and master pass 2 o'clock. I believe the amp with this quality should be able to handle it. I played several different gigs with it. I thought I could get some more volume out of it because it has some more wattage than Workingmans 12 I have, but not really because it gets overdriven so quickly. I think the head has plenty of headroom but the cab cannot handle it. So my question is, how much volume could you get out of AI Coda(or Contra) before distortion? I already called AI and they said they would send me a new woofer at no cost if it is damaged one. Nice people!! All I need to do is figure out what is wrong with it unless I want to ship to them.