Alpine S-A32F S-Series 4-channel car amplifier — 55 watts RMS x 4

4-channel car amplifier 55 watts RMS x 4 at 4 ohms (80 watts RMS x 4 at 2 ohms) 160 watts RMS x 2 bridged output at 4 ohms (4-ohm stable in bridged mode) CTA-2006 compliant variable high- and low-pass filters (50-400 Hz, 12 dB/octave) preamp and speaker-level inputs speaker wire to RCA adapter required for speaker-level input Remote Sensing automatic turn-on when using speaker-level inputs optional wired remote level control for Ch 3/4 available wiring and hardware not included with amplifier 8-gauge power and ground leads recommended fuse rating: 40A x 1 dimensions: 8"W x 2-1/4"H x 8"D warranty: 1 year Our 60-day money-back guarantee Features and Specs Performance RMS Power Output (Watts x Channels) 55 x 4 Peak Power Output (Watts x Channels) --- Power at 2 Ohms (Watts x Channels) 80 x 4 Bridged Power (Watts x Channels) 160 x 2 Minimum Impedance Bridged 4 Minimum Impedance Unbridged 2 Best Frequency Response --- THD at Rated RMS Power --- Signal to Noise Ratio --- Input Voltage --- Features Amplifier Class D Low-Pass Crossover Frequency 50-400 Hz Low-Pass Slope (dB/octave) 12 dB/octave High-Pass Crossover Frequency 50-400 Hz High-Pass Slope (dB/octave) 12 dB/octave Bass Boost --- Bass Boost Frequency --- Fan Cooled --- Fuse Rating 40 Speaker Level Inputs RCA Preamp Outputs No Width (inches) 8 Height (inches) 2-1/4 Depth (inches) 8 Parts Warranty 1 Year Labor Warranty 1 Year