•Reference Series Class AB 4-Channel Amplifier •RMS Power Rating: ◦4 ohms: 75 RMS x 4 chan. ◦2 ohms: 90 RMS x 4 chan. ◦Bridged, 4 ohms: 180 RMS x 2 chan. •Max power output: 117 RMS x 4 chan. •MOSFET power supply •LED power and protection indicators •Tuned Bass EQ (0-6 dB bass boost at 50 Hz) •IMS inputs allows connection to other Infinity expansion products •Gold-plated preamp RCA outputs •DC, overheat, over or under voltage, and short circuit amplifier protection •Gold-plated RCA level inputs •Variable high-pass filter (32-320 Hz, 12 dB/octave) •Variable low-pass filter (32-320 Hz, 12 dB/octave) •CEA-2006 compliant amplifier •Frequency response: 20-20000 Hz •Efficiency: 85 dB •Dimensions: 14-3/4"L x 9"W x 2-11/16H •4-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.