{"product_id":"audiotek-at-4000m-4000w-monoblock-car-amplifier","title":"Audiotek AT-4000M 4000W Monoblock Car Amplifier","description":"\u003cp\u003eThe Audiotek AT-4000M is a one-channel monoblock car amplifier designed for adding a dedicated bass channel to a vehicle audio system. It is intended for use with subwoofers and supports a 2-ohm speaker load. Its compact, surface-mount format makes it suitable for trunk, rear-seat-back, or other secure installation locations with adequate ventilation.\u003c\/p\u003e\u003cp\u003eThis amplifier is a practical choice for listeners building a subwoofer system that needs adjustable low-frequency output. A continuously variable low-pass crossover helps limit the amplifier’s output to bass-focused frequencies. The included remote subwoofer level control allows convenient adjustment of bass output from the driver’s position.\u003c\/p\u003e\u003cp\u003eThe AT-4000M is specified for up to 4000 watts maximum power and uses a Class A-B amplifier design. Its MOSFET pulse-width-modulated power supply is designed to provide the amplifier’s operating power. Continuously variable input gain adjustment helps match the amplifier to the output level of the connected source unit.\u003c\/p\u003e\u003cp\u003eFor system flexibility, the amplifier includes nickel-plated RCA inputs as well as speaker-level inputs. This allows it to be integrated with audio systems that provide either low-level RCA signals or amplified speaker outputs. A remote turn-on\/turn-off circuit supports connection to a vehicle audio system’s switched remote-output lead.\u003c\/p\u003e\u003cp\u003eThe AT-4000M uses an aluminum-alloy heat sink to support heat dissipation during operation. Thermal and speaker-short protection circuitry are included to help safeguard the amplifier and connected system. LED power and protection indicators provide a quick visual status check after installation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonoblock Design:\u003c\/strong\u003e Provides one dedicated amplified channel for a bass-focused system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4000W Maximum Power:\u003c\/strong\u003e Supplies a manufacturer-listed maximum output of up to 4000 watts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stability:\u003c\/strong\u003e Supports operation with a 2-ohm speaker load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Low-Pass Crossover:\u003c\/strong\u003e Helps tailor output for subwoofer-frequency playback.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote Bass Level Control:\u003c\/strong\u003e Lets the driver adjust subwoofer level conveniently.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Circuitry:\u003c\/strong\u003e Includes thermal and speaker-short protection for system monitoring.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe amplifier features a heavy-duty aluminum-alloy heat sink and LED power\/protection indicators. Its Class A-B circuit design uses a MOSFET pulse-width-modulated power supply, soft turn-on circuitry, and nickel-plated input connections. The chassis is designed for surface mounting.\u003c\/p\u003e\u003cp\u003eInstall the AT-4000M on a secure, dry surface with sufficient airflow around the heat sink, and disconnect the vehicle battery’s negative terminal before wiring. Connect it to a compatible 12-volt vehicle electrical system, use either RCA or speaker-level input as appropriate, and wire the connected subwoofer system so its final load is not below 2 ohms. Set gain, low-pass crossover, and bass boost conservatively during initial setup, then use the included remote level control for day-to-day bass adjustment.\u003c\/p\u003e","brand":"Audiotek","offers":[{"title":"Default Title","offer_id":45614174142534,"sku":"AT-4000M","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/81Pgj7prgGS.jpg?v=1784359201","url":"https:\/\/audiowatt.store\/products\/audiotek-at-4000m-4000w-monoblock-car-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}