Please...Gibson fanboys in Mesa forums GO AWAY!!!! Mesa Boogie USED TO design boutique amps...now they design GARBAGE. Actually REPAIR older models ...NOT ON GIBSONS WATCH! I sent my Mark IVB to the Petaluma shop for repairs and rehab and they sent it back supposedly repaired. The first thing that happened is the thing blew tubes....they had left **** loose in the chassis and a nut shorted the board....located the nut and removed it...amp still working with new tubes,,,,so play and test...something sounds DARK on R2 and the Loop LED not working....call Mesa(Gibson), and after FUCKING AROUND WITH GETTING TRANSFEREED TO NASHVILLE SUPPORT>>>FINALLY GOT THE TECH in California>>>and he told me that they had no source for led's anymore...would NOT source any new ones for older amps....and he tried to GLUE IT BACK TOGETHER AND CALL IT REPLACEMENT>>>they HAPPILY refunded my money for the repair(are you getting they charged me for a repair they NEVER ATTEMPTED, Tried to lie to me about it and I had to get the tech to admit the games)...NOT TO MENTION YOU HAVE TO AUDITION YOUR AMPS FOPR REPAIR....IF YOUR AMP HAS BADLY DAMAGED CAPS they will refuse to repair it(apparently the leaks cause board damage and the only tech that did those was Mke B and HE IS GONE>>>ARE YOU HEARING HE HAS BEEN GONE FOR YEARS ACCORDING TO MESA)>>>>>**** MESA,.,.,THEY are not THE COMPANY THEY USED TO BE AND WERENT even under Randall these last ten years>>>LOOK AT THE **** THEY PULLED WITH THE MARK V..(MARK V USERS KNOW WHAT I MEAN)...BAN ME FOR THE TRUTH MESA