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Alpine S-Series 40-Watt x 4-Channel Power Amplifier with 300-Watt Sub Channel @ 2Ω The S-Series amplifiers are designed to fit anywhere. The S-A55V 5-Channel model measures at 11.25” W x 8” H x 2.25” D and can be mounted under seats or behind panels. It proves to be the all-in-one solution for a multi-amp system, so you can enjoy big power output in a limited installation space. The S-Series amplifiers contain technology that was previously only available in our premium line up of amplifiers, the R- and X-Series models. The S-Series models are based on Alpine’s intelligent amplifier platform that ensures superior sound reproduction and precision imaging. With an improved heat sink, and protection circuit design that eliminates thermal shut-down, your music will keep playing no matter where your drive takes you. Specifications Alpine's Class D amplifier circuit 40W RMS x 4 +200W RMS x 1(4Ω, 14.4V, ≤ 1% THD+N) 60W RMS x 4 +300W RMS x 1(2Ω, 14.4V, ≤ 1% THD+N) Bridged: 120W RMS x 2 (4Ω, 14.4V, ≤  1% THD+N) S/N >83dB (ref. 1W into 4Ω) THD+N ≤ 0.03% (ref. 1W into 4Ω) Frequency response =10Hz to 30kHz (+/-3dB) Damping Factor: CH 1/2/3/4 >100, CH 5 >750 Alpine S-A55V Manual

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