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Authorized dealer · Car Audio Bargain
Car amplifiers turn a weak head unit signal into the clean power that subwoofers and speakers need to play loud without distortion. This lineup runs from compact monoblocks around 100 watts RMS to competition amps far past 4,500 watts, plus 2, 4, 5 and 6-channel models from Sundown Audio, Crossfire, Audio Apex and Galeforce.
Daily drivers, powersports rigs and SPL walls all have a match here.
Start with what the amp has to drive. A monoblock amplifier is built for subwoofers: one channel, high current and stability at low impedance. Multi-channel amps handle speakers, with 4-channel models covering front and rear doors and 5-channel models running four speakers plus a sub from a single chassis.
Ignore peak ratings. Add up the RMS handling of your subwoofers, work out the final impedance after wiring the voice coils, and pick an amp whose RMS rating at that exact load lands close to the total. An undersized amp gets pushed into clipping, and a clipped signal damages drivers faster than clean power does.
Every watt comes from the battery and alternator. A rough current estimate is RMS output divided by system voltage, then divided again by the amp's efficiency. Moderate builds usually run well on a quality amp wiring kit sized to that draw and the length of the run, while larger systems call for 1/0 AWG wire, extra batteries and sometimes a high-output alternator.
Choose subwoofers whose coil options let you reach a load the amp is rated for, and consider a remote bass knob so you can adjust sub level from the driver's seat. Refurbished Sundown Audio amps, which carry a 90-day warranty, are another way to stretch a budget. Whatever you choose, set gains with test tones and a meter or oscilloscope rather than by ear, because the gain control matches input voltage and is not a volume knob. Car amplifiers set up this way run cooler, sound cleaner and protect the speakers they power.
Shop Pay InstallmentsPay over time, powered by Affirm
Lease-to-own with SnapNo credit needed¹
Pay later with SezzleFlexible payment options
Shop Pay Installments: Rates from 0-36% APR. Payment options through Shop Pay Installments are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. Snap: The advertised service is a lease-to-own agreement provided by Snap RTO LLC. Lease-to-own financing is not available to residents of Minnesota, New Jersey, and Wisconsin. ¹ Not all applicants are approved. While no credit history is required, Snap obtains information from consumer reporting agencies in connection with submitted applications, and your score with those agencies may be affected. Sezzle: Issued by WebBank or Sezzle. See loan agreement for details. Refurbished items are not eligible for financing or leasing.
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