Gear: Stewart 1.2 amp Avalon U-5 pre-amp/direct box Bergantino 2x12 - rated 600 watts @ 4 ohms Genz Benz 4x10 XB - rated 500 watts @ 4 ohms I usually power one cab or the other, but I just joined a loud band and have found that I can use both cabs. But when I run amp bridged to cab and tap off to another, the amp starts to cut out. Am I dropping impedance too low? Do I need to turn down power output? I thought about tapping off each side of the Stewart. It is actually two 600 watt amps on either side. But my Avalon pre-amp only has one XLR output, so how do I split signal to each side of the amp? A crossover? Or what's the best way to power both cabs? Any suggestions would be appreciated to help me utilize both cabs for maximum efficiency and great tone... I'd rather have that than just a big loud rig!