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Price range: $110–$580
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8 (4)

4-Channel Amplifiers

True 800W RMS, Full Range Class D 4-Channel Amplifier (JAD-800.4)
Free Ground Shipping within the 48 states
Class D 4-Channel Amplifier • 4 ohms: 125 watts x 4 chan. • 2 ohms: 200 watts x 4 chan. • Bridged, 4 ohms: 400 x 2 chan. • Pulse Width Modulated MOSFET Power Supply • 4/3/2 Channel Operation
$239.99
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  • 4.8
  (11 reviews)
400W RMS eXcelon Series 4-Channel Reference XR Stereo Bridgeable Car Power Amplifier (XR4004)
Free Ground Shipping within the 48 states
XR Series 4-Channel Class D Amplifier • 75W x 4 Chan. @ 4 ohms • 100W x 4 Chan. @ 2 ohms • 200W x 2 Chan. @ 4 ohms • 3-Way System Protection • 4/3/2/1 Channel Operation • 4 Gauge Power and Ground Inputs • Extremely Thin Design
$199.99
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900W RMS, Phantom Series Class D Full Range 4-Channel Amplifier (P 900.4)
Free Ground Shipping within the 48 states
Phantom Series Class D Full Range 4-Channel Car Amplifier • 450W RMS x 2 Channel @ 4 ohms Bridged • Tri-Mode Capable • 3-Way System Protection • Variable Low-Pass Crossover • Variable High-Pass Crossover • Band-Pass Crossovers • Input Source Selector
$189.99
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  • 5.0
  (10 reviews)
400W RMS 4-Channel Class D Prime Series Amplifier
Free Ground Shipping within the 48 states
Prime Series Full Range Class D 2-Channel Car Amplifier • 75W x 4 Chan. @ 4 ohms • 100W x 4 Chan. @ 2 ohms • 200W x 2 Chan. @ 4 ohms Bridged • Variable Bass Boost • Variable High-Pass Crossover • CEA-2006 Compliant
$159.99
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  • 3.9
  (8 reviews)
440W 4-Channel Reference MYKRO Series Hybrid Class D Full-Range Car Power Amplifier (RM4404)
Free Ground Shipping within the 48 states
Reference MYKRO Series 4-Channel Hybrid Class D Full-Range Car Amplifier • 75W x 4 Chan. @ 4 ohms • 110W x 4 Chan. @ 2 ohms • 220W x 2 Chan. @ 4 ohms • 4-Way System Protection • 4/3/2/1 Channel Operation • 4 Gauge Power and Ground Inputs • FLUID-FETS Circuit for Smooth Sound Quality
$184.99
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300W RMS XC Series Micro 4-Channel Class D Compact Design Car Amplifier
Free Ground Shipping within the 48 states
XC Series 4-Channel Class D Amplifier • 50W x 4 Chan. @ 4 ohms • 75W x 4 Chan. @ 2 ohms • 3-Way System Protection • 4 Channel Operation • 8 Gauge Power and Ground Inputs • Micro Size Amplifier for Maximizing Space Saving Applications
$109.95
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600W RMS 4-Channel Stealth Series Full-Range Class D Car Power Amplifier (Stealth5004)
Free Ground Shipping within the 48 states
Stealth Series 4-Channel Class D Amplifier • 90W x 4 Chan. @ 4 ohms • 150W x 4 Chan. @ 2 ohms • 3-Way System Protection • 4/3/2/1 Channel Operation • 4 Gauge Power and Ground Inputs • 12dB Vega Bass Boost
$299.99
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520W RMS 4-Channel iON Series Class D Full-Range Digital Stereo Bridgeable Amplifier (i5204)
Free Ground Shipping within the 48 states
iON Series 4-Channel Class D Amplifier • 100W x 4 Chan. @ 4 ohms • 130W x 4 Chan. @ 2 ohms • 260W x 2 Chan. @ 4 ohms • 3-Way System Protection • 4/3/2/1 Channel Operation • 4 Gauge Power and Ground Inputs • Surface Mount Technology (SMT)
$139.95
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790W RMS Class D 4-Channel SK Series Stereo Bridgeable Car Amplifier
Free Ground Shipping within the 48 states
SK Series 4-Channel Class D Amplifier • 133W x 4 Chan. @ 4 ohms • 204W x 4 Chan. @ 2 ohms • 396W x 2 Chan. @ 4 ohms • 3-Way System Protection • 4/3/2/1 Channel Operation • 4 Gauge Power and Ground Inputs • Double Sided 1 Oz Circuit Board
$479.99
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320W RMS 4-Channel iON Series Class D Full-Range Digital Stereo Bridgeable Amplifier (i3204)
Free Ground Shipping within the 48 states
iON Series 4-Channel Class D Amplifier • 60W x 4 Chan. @ 4 ohms • 80W x 4 Chan. @ 2 ohms • 160W x 2 Chan. @ 4 ohms • 3-Way System Protection • 4/3/2/1 Channel Operation • 4 Gauge Power and Ground Inputs • Surface Mount Technology (SMT)
$129.95
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600W RMS 4-Channel Class D Prime Series Amplifier
Free Ground Shipping within the 48 states
Prime Series Full Range Class D 4-Channel Car Amplifier • 100W x 4 Chan. @ 4 ohms • 150W x 4 Chan. @ 2 ohms • 300W x 2 Chan. @ 4 ohms Bridged • Variable Bass Boost • Variable High-Pass Crossover • CEA-2006 Compliant
$234.99
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  • 5.0
  (4 reviews)
Availability: Out of Stock - Backorder
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800W RMS, 4-Channel Class D PA Series Car Amplifier
Free Ground Shipping within the 48 states
PA Series 4-Channel Class D Car Amplifier • 125W x 4-Chan. @ 4 ohm • 200W x 4-Chan. @ 2 ohm • 400W x 2-Chan. Bridged • Level Control • High-Pass Filter • Adjustable High-Pass & Low-Pass Frequencies
$259.99
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  • 4.8
  (4 reviews)
Availability: Out of Stock - Backorder
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Universal Head Unit Power Pack for Use with all Aftermarket & Factory Receivers
Free Ground Shipping within the 48 states
Universal Power Pack 4-Channel Class D for All In-Dash Receivers • 45W x 4 Chan. @ 4 Ohm • Adjustable Gain Switch • Plug-and-Play • CEA-2006 Compliant
$129.95
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  • 5.0
  (3 reviews)
Availability: Out of Stock - Backorder
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1300W Max 4-Channel X Power Series Car Amplifier
Free Ground Shipping within the 48 states
4-Channel X Power Series Car Amplifier • 4 ohms: 110 watts x 4 chan. • 2 ohms: 160 watts x 4 chan. • Bridged, 4 ohms: 320 watts x 4 chan. • Pulse Width Modulated MOSFET Power Supply
$289.95
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400W RMS PDX Series 4-Channel Power Density Digital Amplifier
Free Ground Shipping within the 48 states
PDX Series 4-Channel Car Amplifier • Class D • 400 Watts RMS • 100 Watts x 4 Chan. RMS • Variable High-Pass and Low-Pass Filter • Blue LED Power/Status Indicator • Compact Size
$369.95
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  • 5.0
  (10 reviews)
Availability: Out of Stock - Backorder
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340W RMS 4-Channel X Power Series Car Amplifier
Free Ground Shipping within the 48 states
MRX Series 4-Channel Car Amplifier • 55W RMS @ 4 Ohms x 4 Channels • 85W RMS @ 2 Ohms x 4 Channels • 170W RMS @ 4 Ohms Bridged x 2 Channels • Variable Low-Pass Crossover • Variable High-Pass Crossover • Variable Bass Boost
$249.95
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  • 4.0
  (1 review)
Availability: Out of Stock - Backorder
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600W RMS PDX Series 4-Channel Power Density Digital Amplifier
Free Ground Shipping within the 48 states
PDX Series 4-Channel Car Amplifier • Class D • 600 Watts RMS • 150 Watts x 4 Chan. RMS • Variable High-Pass and Low-Pass Filter • Blue LED Power/Status Indicator • Compact Size
$579.99
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  • 4.7
  (10 reviews)
Availability: Out of Stock - Backorder
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Marine Series 4-Channel Power Density Digital Amplifier (PDX4.100M)
Free Ground Shipping within the 48 states
Marine Series 4-Channel Class D Car Amplifier • 100W x 4 chan. @ 4 ohms • 100W x 4 chan. @ 2 ohms • 200W x 2 chan. @ 4 ohms • 4/3/2 channel operation • Coated to protect unit against harsh marine environment • Compact and stackable design
$379.99
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  • 4.5
  (2 reviews)
Availability: Out of Stock - Backorder
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Related Categories

Amplifier Wiring Kits
Get all the cables, wires, and hardware you need to install your new car amplifier with one of these power amp kits. Amplifier wiring kits come with your basic power and ground cables, as well as other necessary wires. Select complete amplifier kits will include speaker wire, RCA interconnect cables, and more! Make sure to get the kit that is best designed for your car audio system.
Capacitors
Car audio capacitors are a great addition to any aftermarket audio system that is in need of a little extra power. Capacitors store a temporary electrical charge that can be released during periods of extra power strain. If a vehicle has dimming headlights when music is played, a capacitor could solve that problem.
Sound Processors
For those who want the most out their car audio system, a quality sound processor is a must. After some slight adjustments, your systems will sound like it has been professionally tuned and optimized. Tune your system to perfection with these crossovers, equalizers, and bass drivers.

4-Channel Amplifiers Information

A 4-channel amplifier is the best way to power a complete set of new car speakers. These amplifiers are designed to power four door speakers, although the right & left channels can usually be bridged to offer a wide range of wiring options. Commonly, the rear channels will be bridged to power a small subwoofer while the front channels are used for the front speakers. Some audiophile installations use these amplifiers to bi-amp a pair of component speakers – in these setups, each tweeter and midwoofer is powered from their own channel. Four channel amplifiers mostly utilize class A/B circuitry for the best possible sound quality, but the last few years have seen a huge rise in the popularity of full-range class D amps. These amplifiers are prized for their compact chassis, and advances in technology have made them sound almost indistinguishable from their A/B counterparts. 4-Channel amplifiers also frequently feature preamp outputs or signal pass-thru, allowing you to provide signal to a subwoofer amp without running another RCA cable to your head unit.