Alpine® R-A90S R-Series 6/5/4/3 Channel Power Amplifier

• Hi-Res Audio Compliant
• Remote Bass-Knob ready with the RUX-KNOB.2 (sold separately)
• Optimized for Alpine’s R-Series Sound System
• Hi-Resolution Audio Compliant (40k Hz)
• CTA-2006
• Alpine’s Class D Amplifier Circuit
• 75W x 4 + 150W x 2 (4Ω, 14.4V, < 1% THD +N)
• 100W x 4 + 250W x 2 (2Ω, 14.4V, < 1% THD +N)
• Bridged: 200W x 2 + 500W x 1 (4Ω, 14.4V, < 1% THD +N)
• S/N > 85dB (ref. 1W into 4Ω)
• THD + N < 0.03% (ref. 10W into 4Ω)
• Frequency response: 10-45kHz (0/-3dB)
• Damping factor > 500

Versatile System Builds

The R-A90S features a staggered power channel layout that allows each channel to host different levels of power, compared to traditional, multi-channel amplifiers. This allows the R-A90S to 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. Now you can use one amplifier to either power an active 3-way sound system or use it to power your speakers and subwoofer without the bulk of an additional amplifier.

Music In Hi-res

Hear the subtle details you’ve been missing in your music with the R-A90S. With the highest power output in its category, the R-A90S drives power to your sound system to create a big dynamic music range for the listener, reproducing high-frequency sounds up to 45k Hz, making the R-A90S Hi-Res Audio Compliant.

Useful Documents