Features include: Max. Power 260W x 2. Super Optimum High Power Circuit (SOHC). Top-Mounted Control Panel. Dual 80Hz Low-Pass or High-Pass Crossovers. Dual Variable 50Hz Bass Boosts. Gold-Plated Connectors. Die-Cast Aluminum Heat Sink. Bridgeable 4-Channel Power Amplifier. Continuous Power (RMS) of 50W per channel into 4 ohms 20Hz-20kHz at no more than 0.08 THD. 2 Ohm Stable Operation (2-8 Ohm Allowable). Variable Input Level Control. HPF/LPF/OFF Switch. Gold-Plated Large Input Terminal and RCA Jack. Over-Temperature Protection. Overload Protection. Short Circuit Protection. DC Offset Protection. Anti-pop Circuit. Signal/Noise Ratio 100dB. Bass Boost Frequency 50Hz Line Input Level 0.3-5V