{"product_id":"stx-audio-stx1200-4d-4-channel-class-d-amplifier","title":"STX Audio STX1200.4D 4-Channel Class D Amplifier","description":"\u003cp\u003eThe STX Audio STX1200.4D is a compact four-channel Class D amplifier designed to add dedicated power and tuning flexibility to a car audio system. It provides 60 watts RMS per channel at 4 ohms or 75 watts RMS per channel at 2 ohms. This makes it suited to powering compatible full-range speakers in a four-speaker installation.\u003c\/p\u003e\u003cp\u003eFor systems that need more output on fewer channels, the amplifier can bridge its channels to deliver 140 watts RMS x 2 at 4 ohms. That configuration can support two compatible speakers or subwoofer applications that meet the stated bridged-load requirement. Its four-channel layout gives installers options when planning a speaker-focused upgrade.\u003c\/p\u003e\u003cp\u003eThe STX1200.4D uses a MOSFET circuit design and Class D amplification architecture. Its SMT construction and double-sided PCB are specified to support stable operation in a compact format. The design is intended for vehicle audio systems where available mounting space may be limited.\u003c\/p\u003e\u003cp\u003eAdjustable high-pass and low-pass filters provide useful control over which frequencies are sent to connected speakers. Both filter sections adjust from 35 Hz to 250 Hz, allowing the amplifier to be tailored for full-range speakers or low-frequency duty. This helps match the amplifier's output to the role of each speaker in the system.\u003c\/p\u003e\u003cp\u003eBuilt-in overload protection and thermal protection support safer operation under demanding conditions. The amplifier is rated for a maximum current draw of 26A and lists a signal-to-noise ratio greater than 80 dB with total harmonic distortion below 1%. It is a practical option for a compatible aftermarket head unit or factory-audio integration plan using appropriate signal connections and installation hardware.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Output:\u003c\/strong\u003e Powers up to four compatible speakers from one compact amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75W RMS at 2 Ohms:\u003c\/strong\u003e Delivers rated per-channel power for compatible 2-ohm speaker loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channels:\u003c\/strong\u003e Combines channel pairs for 140W RMS x 2 at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e HPF and LPF controls tune frequencies from 35 Hz to 250 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMOSFET Circuit Design:\u003c\/strong\u003e Supports efficient amplification and dependable power delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Circuitry:\u003c\/strong\u003e Includes overload and thermal protection for operation under load.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe STX1200.4D is built around a Class D MOSFET circuit design with SMT components and a double-sided PCB. Its compact amplifier chassis measures 4.6 x 4.8 x 2 inches, helping it fit in installations where a larger amplifier may be difficult to mount. Built-in thermal protection is specified at 176°F.\u003c\/p\u003e\u003cp\u003eMount the amplifier securely in a dry, ventilated location and use correctly sized power, ground, signal, and speaker wiring for the vehicle installation. Use four compatible 2- or 4-ohm speakers for stereo operation, or bridge channel pairs only with compatible 4-ohm loads. Set the HPF or LPF controls from 35 Hz to 250 Hz according to the connected speakers and overall system design.\u003c\/p\u003e","brand":"STX Audio","offers":[{"title":"Default Title","offer_id":45663611715654,"sku":"STX1200-4D","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/71KyB3brTxL.jpg?v=1784449472","url":"https:\/\/audiowatt.store\/products\/stx-audio-stx1200-4d-4-channel-class-d-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}