I've had the walkabout 1x12 for about 6-7 years now and experienced a new problem last night. I just got a Carvin SB5000 and the Mesa started farting when I was playing on the B string and when I drop tuned my E string. I've played 5 strings through it for years and never had this problem. I'm assuming that the bass boost of the Carvin is a little too much for the speaker to handle. Should this be the case, does anyone recommend another combo amp or possibly an alternate solution? Thanks.