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Alpine R-A90S R-Series 6/5/3 Channel Power Amplifier with Staggered Power.  Experience your music in Hi-Res with the versatile R-A90S 6-Channel Amplifier for hair-raising details that puts you in the center of the performance.




The R-A90S has a unique staggered power channel layout that has double the power on the last two channels. When looking to power a dual subwoofer configuration, the R-A90S’s 5th and 6th channels can be bridged to provide up to 500-watts at 4Ω. The R-A90S is matched in power and performance for the Dual 10-inch Alpine Halo S-Series Preloaded Subwoofer Enclosures with ProLink™.




Thanks to the unique staggered power channel layout, the R-A90S can host different levels of power on each channel, compared to traditional, multi-channel amplifiers. This allows the R-A90S to grow with you as it can effectively function as both a 3-way active amplifier and a 5-channel amplifier by delivering the power you need to the channels where you need it the most. 



Alpine R-A90S R-Series 6/5/3 Channel Power Amplifier with Staggered Power


    • Hi-Res Audio Certified (Up to 45kHz)
    • 4-Channel Amplifier 
    • Alpine’s Class D Amplifier Circuit 
    • Reduced Footprint (15% smaller compared to the previous R-A60F model)
    • One-Sided Terminal Layout 
    • Top Panel Sound Controls
    • Integrated Mounting Feet for Simple Installation
    • Optional Remote Bass Knob Compatible (required RUX-KNOB.2 or RUX-H01, sold separately)


    What's in the Box:

    • (x1) R2-A60F 4-Channel Amplifier
    • Owner’s Manual
    • “Birth Sheet” that certifies by measurement the actual power of the amplifier in the box
    • (x4) Screws for amplifier mounting to the vehicle 
    • (x3) Allen wrench for amplifier connection and installation (2mm, 2.5mm, 3mm)
    • Alpine Registration Card
    • Alpine Limited Warranty Sheet
    • Installation Guide

    • Dimensions: 11.1” W x 2.17” H x 6.5” D
    • Weight: 7 lbs, 3 oz
    • Power Rating: 14.4V, ≤ 1% THD +N
    • Power Output: 100W x 4 @ 4Ω, 150W x 2 @ 2Ω
    • Bridged Power: 300W x 2 @ 4Ω
    • S/N Ratio: >80dB
    • Frequency Response: 10Hz – 45kHz
    • Damping Factor: >100
    • CTA-2006-D Certification
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