{"product_id":"qr80-2-2-channel-class-d-car-amplifier","title":"QR80.2 | 2-Channel Class D Car Amplifier","description":"\u003cp\u003e\u003cstrong\u003e⚠️ Closeout Item — Final Sale. All sales are final. Item is new unless otherwise noted.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWe're clearing out our Cadence Quartz Resonance inventory and the \u003cstrong\u003eQR80.2\u003c\/strong\u003e is a great pickup at this price. This is a compact 2-channel Class D amplifier that punches well above its size — solid power output, clean signal, and enough tuning flexibility to work in a wide range of installs. At \u003cstrong\u003e$85 (was $159.99)\u003c\/strong\u003e, it's hard to beat for a front stage amp or a dedicated sub channel when bridged.\u003c\/p\u003e\n\n\u003cp\u003eWe've installed Cadence amps and the QR series is well-built — aluminum alloy heatsink, nickel-plated RCA inputs, and four-way protection circuitry. It's not a budget throwaway; it's a quality amp at a closeout price because we're done carrying the line.\u003c\/p\u003e\n\n\u003ch3\u003eWhy We Like It\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e120W x2 @ 2 Ohm \/ 80W x2 @ 4 Ohm\u003c\/strong\u003e — real-world usable power for most front stage or component setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable to 240W @ 4 Ohm\u003c\/strong\u003e — run it mono into a sub if needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass D Efficiency\u003c\/strong\u003e — runs cool, draws less current, easier on your electrical system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable HPF \u0026amp; LPF (50–250 Hz)\u003c\/strong\u003e — dial in crossover points without an external processor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0–15 dB Bass Boost\u003c\/strong\u003e — useful for sub applications when bridged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 Hz – 36 kHz Frequency Response\u003c\/strong\u003e — full range, \u0026lt;0.05% THD, \u0026gt;90 dB S\/N ratio\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact footprint: 7.48\" x 6.30\" x 2.05\"\u003c\/strong\u003e — fits under seats, in trunks, tight enclosures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-way protection\u003c\/strong\u003e — thermal, short circuit, DC fault, and power surge\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLimited quantity. Once it's gone, it's gone — we won't be reordering this model.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"wc-product-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eModel\u003c\/th\u003e\n\u003ctd\u003eQR80.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eAmplifier Class\u003c\/th\u003e\n\u003ctd\u003eClass D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eChannels\u003c\/th\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRMS Power @ 2 Ohm\u003c\/th\u003e\n\u003ctd\u003e120W x2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRMS Power @ 4 Ohm\u003c\/th\u003e\n\u003ctd\u003e80W x2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBridged RMS @ 4 Ohm\u003c\/th\u003e\n\u003ctd\u003e240W x1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFrequency Response\u003c\/th\u003e\n\u003ctd\u003e20 Hz – 36 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInput Sensitivity\u003c\/th\u003e\n\u003ctd\u003e200 mV – 6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTHD\u003c\/th\u003e\n\u003ctd\u003e\u0026lt; 0.05%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eS\/N Ratio\u003c\/th\u003e\n\u003ctd\u003e\u0026gt; 90 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInput\u003c\/th\u003e\n\u003ctd\u003eRCA (Nickel-Plated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHPF\u003c\/th\u003e\n\u003ctd\u003e50 Hz – 250 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eLPF\u003c\/th\u003e\n\u003ctd\u003e50 Hz – 250 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBass Boost\u003c\/th\u003e\n\u003ctd\u003e0 – 15 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e7.48\" x 6.30\" x 2.05\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"cadence sound","offers":[{"title":"Default Title","offer_id":43863399727217,"sku":null,"price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0684\/4884\/5937\/files\/Screenshot_5-8-2026_10259_cadencesound.com.jpg?v=1785942255","url":"https:\/\/12volttoys.com\/products\/qr80-2-2-channel-class-d-car-amplifier","provider":"Best Auto Sound \u0026 Security","version":"1.0","type":"link"}