Alpine R-A90S R-Series Power Amplifier 6-Channel Class D 100Wx4 RMS Power

Alpine R-A90S R-Series Power Amplifier 6-Channel Class D 100Wx4 RMS Power

The Alpine R-A90S R-Series 6-Channel Power Amplifier delivers unmatched flexibility, precision, and performance for advanced car audio systems. Engineered with Alpine’s renowned Class D efficiency and Hi-Res Audio capability, this amplifier can power a complete sound stage — including front, rear, and subwoofer channels — all from a single chassis. Designed for audiophiles and enthusiasts alike, the R-A90S ensures clean, dynamic output with impressive clarity and headroom.

• 6-Channel Versatility - Powers a full-range system with 75W RMS x4 plus 150W RMS x2, or bridge for 100W RMS x4 plus 250W RMS x2.
• Class D Efficiency - High-efficiency design produces strong, clean output while minimizing heat and power draw.
• Hi-Res Audio Performance - Supports extended frequency response from 10Hz to 45kHz for detailed, accurate sound reproduction.
• Remote Bass Knob Ready - Allows on-the-fly bass adjustments for seamless control from the driver’s seat (sold separately).
• Flexible System Integration - Ideal for powering multi-speaker configurations or complete front/rear/subwoofer setups.
• Clean Signal Output - Delivers an excellent signal-to-noise ratio greater than 85 dB for distortion-free audio.
• Rugged R-Series Build - Built to Alpine’s high standards with premium internal components and durable construction.

• Brand: Alpine
• Model: R-A90S
• MPN: Alpine R-A90S
• Type: Amplifier
• Class Type: Class D
• Number of Channels: 6 Channel
• Color: Black
• RMS Power: 75Wx4 + 150Wx2 / 100Wx4 + 250Wx2
• Frequency Response: 10Hz - 45kHz
• Impedance: 4 Ohm, 2 Ohm, 1 Ohm
• Signal-to-Noise Ratio: >85 dB
• Features: 6-Channel Amp with 5-Channel Power, Accurate Sound Reproduction
• Features 2: Remote Bass Knob Ready

The Alpine R-A90S is built for enthusiasts seeking superior sound detail and balance. Its multi-channel layout offers complete flexibility for expanding or upgrading your system, while the advanced Class D circuitry ensures power efficiency without sacrificing sound quality. Whether used in a high-performance stereo or full-stage configuration, it delivers the clarity, power, and control expected from Alpine’s R-Series line.

About Alpine: Alpine has been a leader in premium car audio innovation for decades. The R-Series amplifiers combine cutting-edge design, high-efficiency performance, and legendary reliability, making them the top choice for serious audiophiles and car audio professionals.