Alpine S-A55V 5-Channel Car Amplifier, 40W RMSx4 at 4 OHMS, 300W RMSx1 at 2 OHMS

The Alpine S-Series 5-Channel Car Amplifier provides 40W RMSx4 to 4 OHMS and 300W RMSx1 to 2 OHMS, perfect for upgrading your car audio system. With its high-efficiency design, you can get the highest quality audio from every channel. TECH SPECS Class D Amplifier Circuit CTA-2006-B Power Rating:  40W RMS x 4 + 200W RMS x 1 (4ohm, 14.4V = 1% THD+N); 60W RMS x 4 + 300W RMS x 1 (2ohm, 14.4V = 1% THD+N)  Bridged: 120W RMS x 2 (4ohm, 14.4V = 1% THD+N) S/N ratio: >83dB (CH1-5 [ref: 1W into 4 ohm]), >98dB (CH1-4)/104dB (CH5) (ref: rated power into 4 ohm) THD+N = 0.03% (ref 1W info 4 ohm) Frequency Response: 10Hz-30kHz (+/-3 dB) Damping Factor: CH 1/2/3/4 > 100, Ch 5 > 750 Remote bass knob compatible (requires RUX-KNOB.2, sold separately)