{"product_id":"hertz-dp-4-400-4-channel-class-ab-car-amplifier","title":"Hertz DP 4.400 4-Channel Class AB Car Amplifier","description":"\u003cp\u003eThe Hertz DP 4.400 is a four-channel Class AB car amplifier designed to add clean, configurable power to factory or aftermarket audio systems. It provides 75 watts RMS to each of four channels at 4 ohms, making it well suited to powering upgraded front and rear speakers. Its bridgeable design also allows it to support systems that combine stereo speakers with higher-power channels.\u003c\/p\u003e\u003cp\u003eThis amplifier is a practical option for listeners who want greater output and control than a head unit can provide without moving to a large amplifier chassis. It is stable down to 2 ohms per channel in four-channel operation and can be configured for four-, three-, or two-channel use. That flexibility supports a range of speaker layouts as a system grows.\u003c\/p\u003e\u003cp\u003eThe DP 4.400 uses a Class AB output stage with a specified 10 Hz to 45 kHz bandwidth at -3 dB, along with Hi-Res Audio certification covering 10 Hz to 50 kHz. Its 0.01% THD specification at 100 Hz and 70% rated power, 101 dBA signal-to-noise ratio, and balanced input circuitry are intended to support low-noise signal transfer. The result is an amplifier built for detailed full-range speaker amplification rather than subwoofer-only duty.\u003c\/p\u003e\u003cp\u003eInstallation options include RCA preamp inputs for aftermarket radios and speaker-level inputs for integration with many OEM systems. The built-in Universal Speaker Simulator helps maintain compatibility with source units that monitor speaker load, while ART automatic remote turn-on can activate the amplifier from compatible BTL speaker-level signals. A full-range front pre-out can also feed an additional amplifier.\u003c\/p\u003e\u003cp\u003eIndependent front and rear high-pass and low-pass filter sections allow the DP 4.400 to be tailored for full-range speakers, component systems, or mixed amplified systems. Each filter section adjusts from 50 Hz to 4,000 Hz with a 12 dB\/octave slope, and the rear section includes selectable 50 Hz bass boost. Its compact footprint, protected controls, and solid terminal arrangement make it a capable foundation for a carefully planned vehicle audio upgrade.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class AB Power:\u003c\/strong\u003e Delivers 75 watts RMS per channel at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stable Outputs:\u003c\/strong\u003e Supports 105 watts RMS per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Design:\u003c\/strong\u003e Provides up to 210 watts RMS per bridged pair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHi-Res Audio Certified:\u003c\/strong\u003e Supports a certified 10 Hz to 50 kHz response range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM and Aftermarket Inputs:\u003c\/strong\u003e Includes RCA pre-in and speaker-level input connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e High- and low-pass filters help match speakers and system roles.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe DP 4.400 uses a compact chassis with a removable top panel that protects its controls and connections. It features a status LED and machined terminal blocks for power and speaker wiring. The amplifier measures 335 x 190 x 50 mm and weighs 2.88 kg.\u003c\/p\u003e\u003cp\u003eUse RCA pre-in connections with an aftermarket head unit, or use the speaker-level inputs when retaining a compatible factory radio. Configure each channel pair with its level control and high-pass, low-pass, or full-range setting before finalizing speaker wiring. For bridged operation, use 4-ohm speaker loads and follow the terminal markings and instructions in the supplied documentation.\u003c\/p\u003e","brand":"Hertz","offers":[{"title":"Default Title","offer_id":45631728615494,"sku":"DP4-400","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/71iBcWt6xrL.jpg?v=1784380326","url":"https:\/\/audiowatt.store\/products\/hertz-dp-4-400-4-channel-class-ab-car-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}