Entry-level sound just got elevated with the S2-A55V 5-Channel Amplifier. Its sleek redesign houses an Alpine Class D Amplifier Circuit and is now certified for Hi-Res Audio Playback. Hi-Res Audio - The Next-Gen Alpine S-Series S2-A55V 5-Channel Amplifier is Hi-Res Audio Certified and able to reproduce up to 40kHz frequency response. This ultra-wide bandwidth coupled with the elevated S-Series design brings out a new benchmark for entry-level performance and price. Flexible Application - The Next-Gen S-Series Amplifiers now feature a new selectable remote turn-on circuit, a three-position switch that ensures the amplifier turns on and off at the proper times. This design is crucial with newer, in-vehicle technology and allows for proper integration with any factory or aftermarket system. Power a Full System – With its versatile 5-Channel design, the S2-A55V Amplifier is the perfect solution to power your sound system all in a single chassis. This amplifier delivers crisp and clear audio to up to four speakers plus an additional subwoofer to give your system a complete audio upgrade MAIN FEATURES • Hi-Res Audio Certified (Up to 40kHz) • 5-Channel Amplifier • Alpine’s Class D Amplifier Circuit • Two-sided terminal layout • Built-in Selectable/ Adjustable Crossovers • Optional Remote Bass Knob Compatible (required RUX-KNOB.2 or RUX-H01, sold separately) TECH SPECS • Power Rating: 14.4V, < 0.1% THD +N • Power Output: 40W x 4 + 200W x 1 @ 4Ω, 60W x 4 + 300W x 1 @ 2Ω • Bridged Power: 120W RMS x 2 @ 4Ω • S/N Ratio: >83dB • Frequency Response: 20Hz – 40kHz • Damping Factor: >100 WHAT’S IN THE BOX • 1 S2-A55V 5-Channel Amplifier • 2 Connection end covers w/4 attachment screws • Owner’s Manual • “Birth Sheet” that certifies by measurement the actual power of the amplifier in the box • 4 Self-tapping screws • 1 Hexagon wrench • Alpine Registration Card • Alpine Limited Warranty Sheet • Tips sheet for power supply wire connection