{"product_id":"crunch-sa-1100-4-4-channel-class-ab-car-amplifier","title":"Crunch SA-1100.4 4-Channel Class AB Car Amplifier","description":"\u003cp\u003eThe Crunch SA-1100.4 is a four-channel Class AB car amplifier designed to add dedicated amplification to a factory or aftermarket audio system. It can power front and rear speakers from four channels or be configured to bridge channel pairs for higher-output two-channel applications. Its selectable operating modes make it suitable for straightforward speaker upgrades as well as mixed speaker-and-subwoofer system layouts.\u003c\/p\u003e\u003cp\u003eAt its published output ratings, the SA-1100.4 delivers 40 watts per channel into 2 ohms or 30 watts per channel into 4 ohms. When two channel pairs are bridged into 4-ohm loads, it provides 60 watts per bridged channel pair. This flexibility helps match the amplifier to common full-range speaker configurations without requiring separate amplifiers for every setup.\u003c\/p\u003e\u003cp\u003eThe amplifier uses Class AB topology with a pulse-width-modulated power supply and Crunch SPEED-FET MOSFET output-device technology. A low-noise preamplifier circuit and RCA signal connections support clean signal transfer from compatible source units. High-level inputs also allow integration with source units that do not provide RCA preamp outputs.\u003c\/p\u003e\u003cp\u003eBuilt-in crossover controls allow the amplifier to be tuned for full-range speakers, high-pass applications, or low-pass applications. Separate crossover controls for channel pairs 1\/2 and 3\/4 make it possible to configure different speaker roles in the same installation. The selectable bass control provides an additional low-frequency adjustment option when system tuning calls for it.\u003c\/p\u003e\u003cp\u003eThe SA-1100.4 fits naturally into an entry-level or replacement amplifier upgrade path for vehicles needing more control than a head unit's internal amplifier can provide. It includes RCA input and output connections for signal routing to another amplifier, helping support expandable systems. Its combination of stereo, bridged, and mixed-mode operation gives installers multiple ways to allocate its four channels.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class AB Design:\u003c\/strong\u003e Powers up to four speakers from one chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Operating Modes:\u003c\/strong\u003e Supports stereo, bridged, and mixed-channel configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Electronic Crossover:\u003c\/strong\u003e Helps direct appropriate frequencies to connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Level Inputs:\u003c\/strong\u003e Connects with factory radios lacking RCA outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Input And Output:\u003c\/strong\u003e Supports low-level signal input and amplifier expansion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Status Indicators:\u003c\/strong\u003e Lighted diagnostics monitor overload and speaker-short conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe SA-1100.4 uses an aluminum QTD heat sink intended to disperse operating heat, along with nickel-plated brass connection terminals and screw-down connectors. Its Class AB circuit design uses a pulse-width-modulated power supply and SPEED-FET MOSFET output devices. LED diagnostic indicators are provided for overload and speaker-short protection monitoring.\u003c\/p\u003e\u003cp\u003eMount the amplifier securely in a ventilated location and do not install it upside down. It accepts low-level RCA input or high-level speaker input through the supplied harness, with RCA output available for another amplifier. Use the 4 AWG power and ground terminals, 12 AWG speaker terminals, a 30A fuse, and set the input level and crossover controls to suit the connected speakers and source unit.\u003c\/p\u003e","brand":"Crunch","offers":[{"title":"Default Title","offer_id":45624922603590,"sku":"SA-1100-4","price":118.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/61FzKW6YyrL.jpg?v=1784373702","url":"https:\/\/audiowatt.store\/products\/crunch-sa-1100-4-4-channel-class-ab-car-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}