{"product_id":"soundqubed-s4-100","title":"SoundQubed S4-100","description":"\u003ch2\u003eSoundQubed S4-100 Four-Channel Class D Amplifier\u003c\/h2\u003e\n\u003cp\u003eThe SoundQubed S4-100 gives compatible door speakers and pro-audio midranges dedicated amplifier power in a compact, high-efficiency Class D design. Run four channels for a speaker upgrade, or use its bridged configuration for suitable speakers or a pair of compatible subwoofers.\u003c\/p\u003e\n\u003ch3\u003eRMS Power by Configuration\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 ohms stereo:\u003c\/strong\u003e 100 watts × 4 channels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 ohms stereo:\u003c\/strong\u003e 175 watts × 4 channels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 ohms bridged:\u003c\/strong\u003e 370 watts × 2 channels, as listed in SoundQubed's specification table\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 175-watt rating is per channel at 2 ohms, not at every impedance. Match the connected speakers' power handling and final impedance to the configuration you plan to use. The listed minimum load is 2 ohms per channel in stereo or 4 ohms bridged; do not assume 2-ohm bridged operation.\u003c\/p\u003e\n\u003ch3\u003eCrossover Control for Your Speaker Setup\u003c\/h3\u003e\n\u003cp\u003eHigh-pass, low-pass, and band-pass filtering options help tailor the signal to the connected speakers. Use appropriate crossover settings for midranges and tweeters, or low-pass filtering for suitable subwoofers. Correct filtering and gain adjustment matter; filters alone do not guarantee protection from speaker damage.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eSoundQubed S4-100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDesign\u003c\/th\u003e\n\u003ctd\u003eClass D, four channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking voltage\u003c\/th\u003e\n\u003ctd\u003e12–15.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eListed maximum amperage\u003c\/th\u003e\n\u003ctd\u003e75A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e10Hz–40kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSignal-to-noise ratio\u003c\/th\u003e\n\u003ctd\u003eGreater than 80, as listed by manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDamping factor\u003c\/th\u003e\n\u003ctd\u003eGreater than 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInput sensitivity\u003c\/th\u003e\n\u003ctd\u003e0.2–8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSubsonic \/ high-pass filter range\u003c\/th\u003e\n\u003ctd\u003e20Hz–5kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLow-pass filter range\u003c\/th\u003e\n\u003ctd\u003e50Hz–5kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower \/ ground terminals\u003c\/th\u003e\n\u003ctd\u003e4 AWG set-screw inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpeaker terminals\u003c\/th\u003e\n\u003ctd\u003e10 AWG set-screw outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions, L × W × H\u003c\/th\u003e\n\u003ctd\u003e7.87 × 7.75 × 2.24 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003ePlan Your Installation\u003c\/h3\u003e\n\u003cp\u003eConfirm speaker impedance, mounting clearance, power wiring, grounding, and circuit protection before installation. The listed 75A maximum-amperage figure is not automatically a recommendation for an external fuse. A separate subwoofer amplifier, such as a compatible SoundQubed S1-850 or Q1-1200.2, can be considered when you want the S4-100 dedicated to mids and highs; any additional amplifier is sold separately.\u003c\/p\u003e\n\u003ch3\u003eLocal Installation in Killeen, Texas\u003c\/h3\u003e\n\u003cp\u003eBest Auto Sound \u0026amp; Security offers local installation in Killeen, Texas. Call 254-213-0501 for help matching the S4-100 to your speakers and planning wiring, integration, and tuning. Installation and any additional required parts are quoted separately.\u003c\/p\u003e","brand":"SoundQubed","offers":[{"title":"Default Title","offer_id":67910024167537,"sku":null,"price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0684\/4884\/5937\/files\/Screenshot_30-10-2026_112219_soundqubed.com.jpg?v=1793377454","url":"https:\/\/12volttoys.com\/products\/soundqubed-s4-100","provider":"Best Auto Sound \u0026 Security","version":"1.0","type":"link"}