{"product_id":"hifonics-zth-1225-1d-mono-class-d-car-amplifier","title":"Hifonics ZTH-1225.1D Mono Class D Car Amplifier","description":"\u003cp\u003eThe Hifonics ZTH-1225.1D is a compact mono car audio amplifier designed to power a subwoofer system. Its single-channel Class D design provides a space-conscious solution for adding dedicated low-frequency amplification to a vehicle. It is suited to system upgrades where a separate bass amplifier is needed without using a large mounting area.\u003c\/p\u003e\u003cp\u003eThis amplifier is rated for up to 1,200 watts at a 1-ohm load, with lower listed output ratings at 2 and 4 ohms. That range gives installers options when matching compatible subwoofer wiring configurations. Its 10 Hz to 500 Hz frequency response and variable low-pass crossover support subwoofer-focused use.\u003c\/p\u003e\u003cp\u003eOnboard controls allow the amplifier to be adjusted for the vehicle and subwoofer system rather than relying on a fixed setup. The low-pass crossover, subsonic filter, bass boost, phase adjustment, and input level control provide practical tuning points. A wired bass remote is included for convenient adjustment of bass level from the front of the vehicle.\u003c\/p\u003e\u003cp\u003eThe ZTH-1225.1D uses a PWM MOSFET power supply and an aluminum heat sink. This design combines a compact Class D amplifier layout with heat-dissipating aluminum construction. LED protection diagnostics provide visible indication of overload or speaker-short protection status.\u003c\/p\u003e\u003cp\u003eFor system integration, the amplifier offers RCA inputs as well as speaker-level audio inputs. Its compact 7.8-inch length can make it easier to place in locations such as a trunk, cargo area, or under a seat when ventilation and secure mounting are available. It is a focused option for adding a mono subwoofer channel alongside a factory or aftermarket source unit.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMono Class D Design:\u003c\/strong\u003e Delivers a dedicated single channel for subwoofer amplification in a compact chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-Ohm Rated Output:\u003c\/strong\u003e Listed at 1 x 1,200 watts at 1 ohm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Low-Pass Crossover:\u003c\/strong\u003e Adjusts the bass cutoff from 40 Hz to 300 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubsonic Filter:\u003c\/strong\u003e Provides adjustable filtering from 10 Hz to 40 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Bass Remote:\u003c\/strong\u003e Lets the user adjust bass level from the listening position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Indicators:\u003c\/strong\u003e Illuminated diagnostics 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 aluminum heat sink, a PWM MOSFET power supply, and molded power, ground, and speaker connection terminals. Its RCA inputs are nickel-plated and designed for secure connections using hex-screw terminals. The angled terminal layout helps provide access for wiring and a cleaner cable-routing profile.\u003c\/p\u003e\u003cp\u003eMount the amplifier securely on a surface with adequate ventilation and do not install it upside down. Use 4 AWG power and ground cable, a properly placed external 60A fuse, and speaker wire up to 12 AWG as specified for this model. Connect signal through RCA or speaker-level inputs, begin with the level control set to minimum, and tune the crossover, subsonic filter, phase, and bass controls for the connected subwoofer system.\u003c\/p\u003e","brand":"Hifonics","offers":[{"title":"Default Title","offer_id":45631973654598,"sku":"ZTH-1225-1D","price":256.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/61raUgjSuLS.jpg?v=1784391038","url":"https:\/\/audiowatt.store\/products\/hifonics-zth-1225-1d-mono-class-d-car-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}