{"product_id":"pyle-audio-car-speakers-amplifier-tda8954-half-bridge-3-channels-rms-135w-2ch-400w-1ch-subwoofer-box-car-amplifier-class-d","title":"2.1CH Class D Car Amplifier — 135W x 2 + 400W Mono @ 2Ω, TDA8954 Half-Bridge, HPF\/LPF\/Bass Boost (SA-PY21)","description":"\u003cp\u003eFull-range and subwoofer power in one compact amplifier. The SA-PY21 is a 2.1-channel Class D car amplifier built around the TDA8954 half-bridge IC — delivering 135W x 2 full-range channels plus 400W mono subwoofer output at 2 ohms, or 90W x 2 plus 260W mono at 4 ohms. Built-in HPF (50–250Hz), LPF (30–200Hz), and bass boost crossover controls let you tune the system for any speaker configuration. Compatible with underseat passive subwoofers (6\", 6x9\", 8\", 10\"), ported tube subwoofers, spare tire subwoofers, and aluminum case subwoofers. Backed by a 1-year warranty.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e135W x 2 + 400W mono @ 2 ohms\u003c\/strong\u003e — High-output 2.1CH amplification for full-range speakers and subwoofer in a single unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTDA8954 half-bridge IC\u003c\/strong\u003e — Premium TDA8954 chip delivers efficient, high-quality Class D amplification for both full-range and subwoofer channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in HPF \u0026amp; LPF crossovers\u003c\/strong\u003e — HPF (50–250Hz) and LPF (30–200Hz) crossover controls for precise frequency management.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBass boost\u003c\/strong\u003e — Adjustable bass boost for enhanced low-frequency output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad subwoofer compatibility\u003c\/strong\u003e — Powers 6–12\" underseat, ported, spare tire, and aluminum case passive subwoofers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10–22kHz frequency response\u003c\/strong\u003e — Wide frequency response for accurate full-range and subwoofer reproduction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40A fuse protection\u003c\/strong\u003e — Built-in 40A fuse for system protection.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e SA-PY21\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Class D 2.1CH (full-range + mono)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip:\u003c\/strong\u003e TDA8954 half-bridge IC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRMS @ 2Ω:\u003c\/strong\u003e 135W x 2CH + 400W x 1CH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRMS @ 4Ω:\u003c\/strong\u003e 90W x 2CH + 260W x 1CH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHPF:\u003c\/strong\u003e 50–250Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLPF:\u003c\/strong\u003e 30–200Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency response:\u003c\/strong\u003e 10–22kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSNR:\u003c\/strong\u003e 91–100dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensitivity:\u003c\/strong\u003e 100mA–10V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse:\u003c\/strong\u003e 40A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 14.4V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 year\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eSA-PY21. 2.1CH Class D. TDA8954. 135W x 2 + 400W mono @ 2Ω. HPF\/LPF\/bass boost. 10–22kHz. 40A fuse. 14.4V.\u003c\/em\u003e\u003c\/p\u003e","brand":"RPM Tune \u0026 Tech","offers":[{"title":"4Ω \/ 2500 W","offer_id":43905556938830,"sku":"191290273:40174303#4Ω;245912207:9734828#2500 W","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/2599\/3294\/files\/H2a062d0b48554f12a3f2322bf6f3596cv.webp?v=1782757553","url":"https:\/\/rpm-tune-and-tech.myshopify.com\/products\/pyle-audio-car-speakers-amplifier-tda8954-half-bridge-3-channels-rms-135w-2ch-400w-1ch-subwoofer-box-car-amplifier-class-d","provider":"RPM Tune \u0026 Tech","version":"1.0","type":"link"}