Alpine S2-A55V Next-Generation S-Series 5-Channel Amplifier

Your plug and play bundle is hand assembled in our Frederick, MD facility. Current processing lead times from order to ship: 5-7 business days

Power, Precision, and Pure Alpine Performance — Meet the S2-A55V!

Unleash your sound system’s true potential with the Alpine S2-A55V 5-Channel Amplifier, engineered to deliver clean, powerful, and balanced audio to your entire setup. Built from Alpine’s next-generation S-Series platform, this amp packs uncompromising performance and versatility into a sleek, compact chassis.

With up to 550 watts RMS of crystal-clear output, the S2-A55V effortlessly drives your front and rear speakers while powering a subwoofer channel for deep, dynamic bass. Its Class-D efficiency ensures cool, consistent operation — even during long, high-volume sessions — while advanced circuitry keeps distortion to a minimum for sound that’s pure, detailed, and alive.

Designed for easy installation and flexible configuration, the S2-A55V is perfect for upgrading factory systems or building your dream setup from scratch. Whether you’re after tight, punchy lows or vibrant, high-fidelity clarity, this amplifier delivers the signature Alpine sound experience that audiophiles crave.

Key Highlights:

• 5-Channel Power: Drive your full system with one amp — including your sub.
• Class-D Efficiency: Powerful performance in a compact, energy-efficient design.
• Clean, Dynamic Output: Up to 550W RMS of pure Alpine audio.
• Flexible Crossover Controls: Tune your sound for perfect balance and precision.
• Modern Design: Compact, durable chassis built for performance and style.

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.

Easy Control Access: The amplifier was intentionally designed with sound controls located on the side panels, instead of the top panel, making it easier to access gain and crossover controls when installed under the Jeep seat or in a shallow-depth locations.  Removable end caps were added to cover the side controls and connections, providing a clean, sleek finish to the amplifier. 

Power A Full System: With its versatile 5-Channel design, the S2-A55V Amplifier is the perfect solution to power your system all in a single chassis.  This amplifier delivers crisp and clear audio to up to four speakers plan an additional subwoofer to give your system a complete audio upgrade.    

• Hi-Res Audio Playback (192kHz/24Bit) 
• 5-Channel Amplifier
• High-Efficiency Digital Circuit Design
• Alpine’s Dual Negative Feedback Control Circuit
• High Bandwidth Amplifier 
• Alpine’s Premium Class D Circuit Design 
• Copper-plated chassis
• Black circuit board
• One-sided terminal layout
• Top panel sound controls
• Quick connect power and speaker terminals
• Optional Remote bass knob compatible (requires RUX-KNOB.2 or RUX-H01, sold separately)

• Dimensions: 11.9” W x 2.25” H x 8.25” D
• Weight: 7 lbs
• 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: >100CTA-2006-D Certification

• (x1) S2-A55V 5-Channel Amplifier
• (x2) 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 
• (x4) Self-tapping screws 
• “Birth sheet” that certifies by measurement the actual power of the amplifier in the box
• (x1) Hexagon wrench   
• Alpine Registration Card 
• Alpine Limited Warranty Sheet 
• Tips sheet for power supply wire connections