XC2510 Compact 5-channel amp 50w x4 @ 4ohms/75W x 4 @ 2ohms; Sub channel 200w x 1 @ 4ohms/ 300w x1 @2ohms; Compact 5-Channel System Amplifier Rated Power (1% THD+N, 14.4V): Main Channels: 50W x 4 @ 4 ohms / 75W x 4 @ 2 ohms; Subwoofer Channel: 200W x 1 @ 4 ohms / 300W x 1 @; 2 ohms – Features: variable High-Pass Filters on main; channels, variable Low-Pass Filter on subwoofer channel, and variable Bass Boost