I got my Avatar B115H (8 ohm) last week and just got my GK 400RBIII to use with it. I'm getting some serious farting when I barely push the GK. I have the preamp volume at 12:00 and the master set at 9:00. I've tried every other combonation of these also. Anytime there is any significant volume, the Avatar just farts, even with the bass down to 9:00. The amp only puts out 180W with the one cab. The Avatar should be able to handle that with no problem, right? So do I have a defective cab, or do you think the problem might be elsewhere. By the way, I'm using a Lakland 55-01 (my only bass at the moment). Thanks for any help.