{"product_id":"hifonics-zth-2225-1d-mono-class-d-car-amplifier","title":"Hifonics ZTH-2225.1D Mono Class D Car Amplifier","description":"\u003cp\u003eThe Hifonics ZTH-2225.1D is a compact mono Class D car amplifier designed for a dedicated subwoofer channel. It provides adjustable low-frequency controls for building or upgrading a bass-focused vehicle audio system. Its compact chassis is suited to installations where available mounting space is limited.\u003c\/p\u003e\u003cp\u003eThis single-channel amplifier is intended for users matching a subwoofer system to a mono amplifier with selectable crossover, subsonic, phase, and bass-EQ controls. Output is listed at 2,200 watts at 1 ohm, 1,100 watts at 2 ohms, and 550 watts at 4 ohms. Proper subwoofer wiring and impedance matching are important when selecting the final system configuration.\u003c\/p\u003e\u003cp\u003eA variable 40-300 Hz low-pass filter lets the amplifier focus on bass frequencies rather than sending full-range content to the subwoofer. The adjustable 10-40 Hz subsonic filter can help tailor the very low-frequency range for the enclosure and system setup. Variable phase control from 0 to 180 degrees can assist with blending subwoofer output with the rest of the vehicle audio system.\u003c\/p\u003e\u003cp\u003eThe ZTH-2225.1D uses a PWM MOSFET power supply and an aluminum heat sink to support efficient Class D operation and heat management. Its low-noise preamplifier circuit is designed to accept a low-level source signal with minimal added distortion. Illuminated protection indicators provide a visible status reference for overload and speaker-short conditions.\u003c\/p\u003e\u003cp\u003eFor system integration, the amplifier provides RCA input and output connections, speaker-level audio inputs, and a wired bass remote. Angled molded terminals are designed to make power, ground, and speaker wiring more accessible. It is a practical choice for a subwoofer upgrade when installed with the specified 4-gauge power and ground wiring and external fuse protection.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMono Class D Design:\u003c\/strong\u003e Efficient single-channel amplification for a subwoofer system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Power Ratings:\u003c\/strong\u003e Supports listed output ratings at 1-, 2-, and 4-ohm loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Low-Pass Filter:\u003c\/strong\u003e Adjusts bass passband from 40 to 300 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubsonic Filter:\u003c\/strong\u003e Adjustable 10-40 Hz filtering helps tailor low-frequency response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWired Bass Remote:\u003c\/strong\u003e Included remote provides convenient bass-level adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Indicators:\u003c\/strong\u003e Illuminated LEDs help monitor overload and speaker-short protection.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe amplifier has a silver compact chassis with an aluminum heat sink for heat dissipation. It uses a PWM MOSFET power supply, nickel-plated high-temperature RCA inputs, and molded angled connection terminals for power, ground, and speaker wiring. The amplifier measures 10.9 inches long, 5.75 inches wide, and 2.5 inches high.\u003c\/p\u003e\u003cp\u003eMount the amplifier securely in a ventilated location and do not install it upside down. The installation guide specifies 4-gauge power and ground cable plus an external 125-amp fuse, with the battery-side fuse installed within 18 inches of the battery terminal. Connect RCA inputs from a compatible source unit or use the speaker-level inputs, set the gain from minimum during setup, and match connected subwoofers to a supported final impedance.\u003c\/p\u003e","brand":"Hifonics","offers":[{"title":"Default Title","offer_id":45631978209350,"sku":"ZTH-2225-1D","price":397.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/61zgtXPfG0S.jpg?v=1784391143","url":"https:\/\/audiowatt.store\/products\/hifonics-zth-2225-1d-mono-class-d-car-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}