GM-D9705Class D 5 Channel Amplifier with Wired Bass Boost Remote Amplifier Class: Class FD No. of Channels5 3 Max power output: 150 W x 4 (A B Ch.) 700 W x 1 (Subwoofer Ch. ) (4) 200 W x 4 (A B Ch.) 1,200 W x 1 (Subwoofer Ch. ) (2) 400 W x 2 (A B ch Bridgedable ) (4 Bridged) RMS power output: 75 W x 4 (A B Ch.) 350 W x 1 (Subwoofer Ch. ) (4) 100 W x 4 (A B Ch.) 600 W x 1 (Subwoofer Ch. ) (2) 200 W x 2 (A B ch Bridgedable ) (4 Bridged) Frequency Response: 10