In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. The word Combo usually implies wimpy electronics and second rate speakers. Not true with the 700RB Series Combos. These amplifiers use the same electronics as the 700RB, and the same high performance woofers as GK's RBH cabinets! Features 480/50 Watt Bi-Amp power, 2x10" speakers, Rock Back, Horn, Lock "N" Roll.