Summary: The QSC will deliver approx. 700w into 8ohms (in bridged mono) and nearly 1400w into 4ohms (Bridged mono again) I switched in the roll off @ 30hz, but only to save the drivers in my cabinets. Otherwise, the pre-set lf roll off is at 5hz. If you slap on this setting, it's shocking! The unit feels like it'd reproduce DC! The attack is phenomenal, but my cabs were showing signs of distress at higher volumes.