{"product_id":"alpine-r-a90s-r-series-power-amplifier-6-channel-class-d-100wx4-rms-power","title":"Alpine R-A90S R-Series Power Amplifier 6-Channel Class D 100Wx4 RMS Power","description":"\u003ch4\u003eAlpine R-A90S R-Series Power Amplifier 6-Channel Class D 100Wx4 RMS Power\u003c\/h4\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\nThe 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.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6-Channel Versatility\u003c\/strong\u003e - Powers a full-range system with 75W RMS x4 plus 150W RMS x2, or bridge for 100W RMS x4 plus 250W RMS x2.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass D Efficiency\u003c\/strong\u003e - High-efficiency design produces strong, clean output while minimizing heat and power draw.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHi-Res Audio Performance\u003c\/strong\u003e - Supports extended frequency response from 10Hz to 45kHz for detailed, accurate sound reproduction.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemote Bass Knob Ready\u003c\/strong\u003e - Allows on-the-fly bass adjustments for seamless control from the driver’s seat (sold separately).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible System Integration\u003c\/strong\u003e - Ideal for powering multi-speaker configurations or complete front\/rear\/subwoofer setups.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClean Signal Output\u003c\/strong\u003e - Delivers an excellent signal-to-noise ratio greater than 85 dB for distortion-free audio.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRugged R-Series Build\u003c\/strong\u003e - Built to Alpine’s high standards with premium internal components and durable construction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Alpine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e R-A90S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e Alpine R-A90S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Amplifier\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass Type:\u003c\/strong\u003e Class D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Channels:\u003c\/strong\u003e 6 Channel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRMS Power:\u003c\/strong\u003e 75Wx4 + 150Wx2 \/ 100Wx4 + 250Wx2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 10Hz - 45kHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eImpedance:\u003c\/strong\u003e 4 Ohm, 2 Ohm, 1 Ohm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e \u0026gt;85 dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e 6-Channel Amp with 5-Channel Power, Accurate Sound Reproduction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFeatures 2:\u003c\/strong\u003e Remote Bass Knob Ready\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\nThe 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.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cstrong\u003eAbout Alpine:\u003c\/strong\u003e 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.\u003c\/p\u003e","brand":"Alpine","offers":[{"title":"Default Title","offer_id":48885541568612,"sku":"Alpine R-A90S","price":699.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/9047\/8436\/files\/0c2cce92-84b5-4841-8cf1-de162ced7c73.jpg?v=1785501095","url":"https:\/\/webtron-x.com\/products\/alpine-r-a90s-r-series-power-amplifier-6-channel-class-d-100wx4-rms-power","provider":"webtron-x","version":"1.0","type":"link"}