Alpine S2-A55V 5-Channel Hi-Res Class D Car Amplifier – 300W Subwoofer & Full-Range Power

Alpine S2-A55V Hi-Res 5-Channel Class D Amplifier

The Alpine S2-A55V is a compact yet powerful 5-channel amplifier designed to power your entire audio system from a single chassis. Hi-Res Audio Certified and capable of reproducing frequencies up to 40kHz, this amplifier delivers detailed highs, dynamic mids, and deep, controlled bass with Alpine’s proven Class D efficiency.

Key Features

• Hi-Res Audio Certified (Up to 40kHz frequency response)
• 5-Channel Amplifier (Full-range + Subwoofer)
• Alpine Class D Amplifier Circuit for high efficiency and low heat
• Two-Sided Terminal Layout for clean, simplified installation
• Built-in Selectable & Adjustable Crossovers
• Optional Remote Bass Knob Compatible (RUX-KNOB.2 or RUX-H01 sold separately)

Power & Performance

• 40W x 4 + 200W x 1 @ 4Ω
• 60W x 4 + 300W x 1 @ 2Ω
• Bridged: 120W RMS x 2 @ 4Ω
• Signal-to-Noise Ratio: >83dB
• Frequency Response: 20Hz – 40kHz
• Damping Factor: >100
• Power Rating: 14.4V, < 0.1% THD + N

Ideal for complete system upgrades, the S2-A55V powers four speakers and a subwoofer while maintaining clean output and precise control. The adjustable crossovers allow detailed system tuning, and the optional remote bass knob gives you on-demand low-frequency adjustment from the driver’s seat.

Compact & Installation-Friendly Design

• Dimensions: 11.9” W x 2.25” H x 8.25” D
• Weight: 7 lbs
• Two-sided terminal layout for easier wire management

What’s in the Box

• (1) S2-A55V 5-Channel Amplifier
• (2) Connection end covers with 4 attachment screws
• (4) Self-tapping screws
• (1) Hexagon wrench
• Owner’s Manual
• “Birth Sheet” certifying measured amplifier power
• Alpine Registration Card
• Alpine Limited Warranty Sheet
• Power supply wire connection tips sheet

Whether you're building a complete system or upgrading factory audio, the Alpine S2-A55V delivers efficient power, Hi-Res clarity, and flexible tuning in a compact 5-channel solution.