{"product_id":"hertz-sp4-500-4-channel-class-d-car-amplifier","title":"Hertz SP4-500 4-Channel Class D Car Amplifier","description":"\u003cp\u003eThe Hertz SP4-500 is a compact four-channel car audio amplifier designed to add clean, configurable power where installation space is limited. It can operate in 4-, 3-, or 2-channel configurations, allowing it to drive a full speaker system, a front stage plus subwoofer, or bridged speakers or subwoofers. Its compact footprint makes it practical for motorcycles, under-seat vehicle installations, and behind-seat truck mounting locations.\u003c\/p\u003e\u003cp\u003eWith 90 watts RMS per channel at 4 ohms or 150 watts RMS per channel at 2 ohms, the SP4-500 is suited to aftermarket speakers that need more power and control than a factory radio can provide. Bridged operation supplies up to 300 watts RMS per pair at 4 ohms. It also supports a three-channel setup for powering two speakers and one bridged subwoofer channel.\u003c\/p\u003e\u003cp\u003eThe amplifier has a wide 10 Hz to 35 kHz bandwidth, a 100 dBA A-weighted signal-to-noise ratio, and less than 0.02% THD under its stated test conditions. Adjustable high-pass and low-pass filters on both channel pairs help tailor the signal for tweeters, full-range speakers, midbass drivers, or subwoofers. A selectable bass boost for channels 3-4 is available when their low-pass filter is engaged.\u003c\/p\u003e\u003cp\u003eHertz uses its ADC, or Advanced D-Class, output stage to provide efficient operation in a small chassis. The amplifier is rated for up to 85% efficiency and uses an IP55-rated aluminum chassis intended to help protect against humidity and external contaminants. Its sealed power, line-input, and speaker-output connections support installations exposed to vibration or changing conditions.\u003c\/p\u003e\u003cp\u003eThe SP4-500 accepts both preamp-level and speaker-level input signals, making it suitable for aftermarket receivers as well as many factory head units. Hertz USS, or Universal Speaker Simulators, is built into the high-level input section to support source units with speaker-load detection circuitry. The included wire-to-RCA adapters and selectable two- or four-channel input mode provide flexibility when integrating it into a new or existing system.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Flexibility:\u003c\/strong\u003e Operates in 4-, 3-, or 2-channel configurations for multiple system layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eADC Class D Output:\u003c\/strong\u003e Delivers compact, efficient amplification with up to 85% rated efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90W x 4 RMS:\u003c\/strong\u003e Supplies rated power at 4 ohms for aftermarket full-range speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Level Input With USS:\u003c\/strong\u003e Integrates with compatible factory radios using speaker-level signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e High-pass and low-pass filters help match channels to speaker roles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP55 Aluminum Chassis:\u003c\/strong\u003e Provides a compact enclosure designed for humid and demanding installations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe SP4-500 uses an IP55-rated aluminum chassis with a compact 192.7 x 130 x 49 mm footprint. Hertz specifies sealed power-cord, line-input, and speaker-output connections to help limit oxidation at connection points. The amplifier does not use an internal cooling fan, helping avoid internal dirt accumulation.\u003c\/p\u003e\u003cp\u003eInstall the amplifier in a dry, ventilated location within its stated 0°C to 55°C operating range, allowing clearance around the chassis for airflow. Use the supplied power and speaker-output harnesses, select either preamp or speaker-level input as appropriate, and set the input mode for two- or four-channel source signals. A 30A fuse is recommended on the power-supply line, positioned close to the battery positive terminal.\u003c\/p\u003e","brand":"Hertz","offers":[{"title":"Default Title","offer_id":45631856083014,"sku":"SP4-500","price":551.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/71ceIedBoRL.jpg?v=1784383902","url":"https:\/\/audiowatt.store\/products\/hertz-sp4-500-4-channel-class-d-car-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}