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  1. Home
  2. Car Audio & Electronics
  3. Car Amplifiers
  4. 4-Channel Amplifiers

4-Channel Amplifiers

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Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
Amplifier Key Features
Amplifiers can offer a diverse array of features. If you select more than one feature, then you will view amplifiers that have ALL features selected. These include speaker-level inputs that facilitate seamless integration with factory audio systems, Bluetooth connectivity suitable for ATV/UTV or Classic vehicle setups, built-in DSPs that provide enhanced control over your audio signal, and a host of other functionalities to explore.
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
FRP Series (9)
SXE Series (9)
Machete Series (8)
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CVP Series (5)
Gen-X (5)
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Brutus BRL Series (3)
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AP Series (2)
Brutus BG Series (2)
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COLOSSUS Mini Series (2)
COLOSSUS Series (2)
Compact Mean Machine Series (2)
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Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Remote bass/level controller
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
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American Bass VFL Stealth 500.4 (VFLSTEALTH-500.4)

250W RMS Class AB VFL Stealth Series 4-Channel Car Amplifier

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American Bass VFL Stealth 500.4 (VFLSTEALTH-500.4)

250W RMS Class AB VFL Stealth Series 4-Channel Car Amplifier

• Total RMS Power: 250 watts
• Class A/B Stable 4-Channel Amplifier

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DS18 FRP-1.2K4/TI

1200W RMS Class D FRP Series 4-Channel Car Amplifier (Titanium)

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DS18 FRP-1.2K4/TI

1200W RMS Class D FRP Series 4-Channel Car Amplifier (Titanium)

• 120 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• 300 watts x 4 channel @ 1 ohm
• Bridged: 350 watts x 2 channel @ 4 ohm
• Bridged: 500 watts x 2 channel @ 2 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable 4-Channel Amplifier

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• 120 watts x 4 channel @ 4 ohm
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• 300 watts x 4 channel @ 1 ohm
• Bridged: 350 watts x 2 channel @ 4 ohm
• Bridged: 500 watts x 2 channel @ 2 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable 4-Channel Amplifier

JL Audio MHD600/4

600W RMS Class D MHD Series 4 Channel Marine Amplifier

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JL Audio MHD600/4

600W RMS Class D MHD Series 4 Channel Marine Amplifier

• 150 watts x 4 channel (rated power from 1.5 to 4 ohm)
• Bridged: 300 watts x 2 channel (rated power from 4 to 8 ohm)
• Total RMS Power: 600 watts
• Class D 1.5 ohm Stable 4-Channel Amplifier

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DS18 ZR600.4D

2400W Peak (960W RMS) Class D ZR Series 4-Channel Car Amplifier

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DS18 ZR600.4D

2400W Peak (960W RMS) Class D ZR Series 4-Channel Car Amplifier

• 150 watts x 4 channel @ 4 ohm
• 240 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 960 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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American Bass XFL-DC-4200

1500W Peak (720W RMS) Class D XFL Series 4 Channel Car Amplifier

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American Bass XFL-DC-4200

1500W Peak (720W RMS) Class D XFL Series 4 Channel Car Amplifier

• 100 watts x 4 channel @ 4 ohm
• 180 watts x 4 channel @ 2 ohm
• Bridged: 360 watts x 2 channel @ 4 ohm
• Total RMS Power: 720 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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JL Audio VX400/4i

400W RMS Class D 4 Channel Car Amplifier with Built-in DSP

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JL Audio VX400/4i

400W RMS Class D 4 Channel Car Amplifier with Built-in DSP

• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes integrated DSP

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DS18 FRP4K4TI

4000W RMS Class D FRP Series 4-Channel Compact Car Amplfier (Titanium)

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DS18 FRP4K4TI

4000W RMS Class D FRP Series 4-Channel Compact Car Amplfier (Titanium)

• 400 watts x 4 channel @ 4 ohm
• 700 watts x 4 channel @ 2 ohm
• 1000 watts x 4 channel @ 1 ohm
• Bridged: 1200 watts x 2 channel @ 4 ohm
• Bridged: 1800 watts x 2 channel @ 2 ohm
• Total RMS Power: 4000 watts
• Class D 1 ohm Stable 4-Channel Amplifier

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• 400 watts x 4 channel @ 4 ohm
• 700 watts x 4 channel @ 2 ohm
• 1000 watts x 4 channel @ 1 ohm
• Bridged: 1200 watts x 2 channel @ 4 ohm
• Bridged: 1800 watts x 2 channel @ 2 ohm
• Total RMS Power: 4000 watts
• Class D 1 ohm Stable 4-Channel Amplifier

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American Bass VFL Comp 350.4FR (VFLCOMP-350.4FR)

1000W RMS Class D VFL Comp Series 4-Channel Car Amplifier

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American Bass VFL Comp 350.4FR (VFLCOMP-350.4FR)

1000W RMS Class D VFL Comp Series 4-Channel Car Amplifier

• 175 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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DS18 G1000.4D

1000 Peak (600W RMS) Class D Gen-X Series 4 Channel Full Range Car Amplifier

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DS18 G1000.4D

1000 Peak (600W RMS) Class D Gen-X Series 4 Channel Full Range Car Amplifier

• 90 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Earthquake Sound MiNi D1000.4

1000W Peak (360W RMS) Class D MiNi Series 4 Channel Car Amplifier

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Earthquake Sound MiNi D1000.4

1000W Peak (360W RMS) Class D MiNi Series 4 Channel Car Amplifier

• 65 watts x 4 channel @ 4 ohm
• 90 watts x 4 channel @ 2 ohm
• Bridged: 190 watts x 4 channel @ 4 ohm
• Total RMS Power: 360 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Autotek MM-3025.4D Mean Machine

3000W Peak Class D Mean Machine Series 4-Channel Car Amplifier

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Autotek MM-3025.4D Mean Machine

3000W Peak Class D Mean Machine Series 4-Channel Car Amplifier

• 375 watts x 4 channel @ 4 ohm
• 750 watts x 4 channel @ 2 ohm
• Bridged: 1500 watts x 2 channel @ 4 ohm
• Total Peak Power: 3000 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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Diamond Audio HX600.4

1000W RMS Class D HEX Series 4-Channel Full Range Car Amplifier

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Diamond Audio HX600.4

1000W RMS Class D HEX Series 4-Channel Full Range Car Amplifier

• 160 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Kenwood KAC-M1814

400W Peak (180W RMS) Class D M Series 4-Channel Car, Marine, Powersports, and Motorcycle Amplifier

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Kenwood KAC-M1814

400W Peak (180W RMS) Class D M Series 4-Channel Car, Marine, Powersports, and Motorcycle Amplifier

• 45 watts x 4 channel @ 4 ohm
• 45 watts x 4 channel @ 2 ohm
• Bridged: 90 watts x 2 channel @ 4 ohm
• Total RMS Power: 180 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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• 45 watts x 4 channel @ 4 ohm
• 45 watts x 4 channel @ 2 ohm
• Bridged: 90 watts x 2 channel @ 4 ohm
• Total RMS Power: 180 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Cerwin-Vega H440.4D

440W RMS Class D HED Series 4 Channel Car Amplifier

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Cerwin-Vega H440.4D

440W RMS Class D HED Series 4 Channel Car Amplifier

• 75 watts x 4 channel @ 4 ohm
• 110 watts x 4 channel @ 2 ohm
• Bridged: 220 watts x 2 channel @ 4 ohm
• Total RMS Power: 440 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Diamond Audio MICRO84U

660W RMS Class D Micro8U Series 4-Channel Full Range Car Amplifier

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Diamond Audio MICRO84U

660W RMS Class D Micro8U Series 4-Channel Full Range Car Amplifier

• 85 watts x 4 channel @ 4 ohm
• 85 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 660 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Cerwin Vega S9600.4D

600W RMS Class D Stroker Series 4 Channel Car Amplifier

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Cerwin Vega S9600.4D

600W RMS Class D Stroker Series 4 Channel Car Amplifier

• 140 watts x 4 channel @ 4 ohm
• 170 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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JL Audio RD400/4 (Open Box, Great)

400W RMS Class D RD Series 4 Channel Car Amplifier

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JL Audio RD400/4 (Open Box, Great)

400W RMS Class D RD Series 4 Channel Car Amplifier

• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Deaf Bonce Machete MLA-60.4

360W RMS Class D Machete Series 4-Channel Car Amplifier

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Deaf Bonce Machete MLA-60.4

360W RMS Class D Machete Series 4-Channel Car Amplifier

• 60 watts x 4 channel @ 4 ohm
• 90 watts x 4 channel @ 2 ohm
• Bridged: 180 watts x 2 channel @ 4 ohm
• Total RMS Power: 360 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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DS18 SXE-2000.4D/BK

2000W Peak (640W RMS) Class D SXE Series 4 Channel Car Amplifier

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DS18 SXE-2000.4D/BK

2000W Peak (640W RMS) Class D SXE Series 4 Channel Car Amplifier

• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 640 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Black Brushed Aluminum Body Color

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Cerwin-Vega XED6004D

500W Peak (480W RMS) Class D XED Series 4 Channel Car Amplifier

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Cerwin-Vega XED6004D

500W Peak (480W RMS) Class D XED Series 4 Channel Car Amplifier

• 80 watts x 4 channel @ 4 ohm
• 120 watts x 4 channel @ 2 ohm
• Bridged: 220 watts x 2 channel @ 4 ohm
• Total RMS Power: 480 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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    FAQ Frequently asked questions in 4-Channel Amplifiers

    4 Channel Amplifiers Frequently Asked Questions (FAQ)
    A 4-channel amplifier is a type of car audio amplifier that features four separate channels, each capable of powering a speaker or a pair of speakers. By distributing power across four channels, you can connect your front and rear speakers to the amplifier, significantly enhancing the overall sound quality and clarity in your car audio system. With a 4-channel amplifier, you can achieve a balanced soundstage, where the music seems to come from different directions, providing an immersive listening experience. Additionally, these amplifiers often come with adjustable crossovers and gain controls, allowing you to fine-tune the audio output for each set of speakers, optimizing the sound reproduction according to your preferences.
    Yes, many 4-channel amplifiers are bridgeable, allowing you to combine two channels to power a single speaker or subwoofer with higher output power. This bridging capability is useful if you have a pair of high-powered front speakers or a powerful subwoofer that requires more power than a single channel can provide. However, it's essential to check the amplifier's specifications and instructions to confirm its bridgeability and the recommended bridging configurations. Not all 4-channel amplifiers support bridging, and improper bridging can damage the amplifier or connected speakers. If you are unsure about bridging your 4-channel amplifier, consult the amplifier's manual or reach out to Sonic Electronix customer support for expert assistance.
    To select the right 4-channel amplifier for your speakers, consider their power handling capabilities and impedance. First, identify the RMS power rating of your front and rear speakers. The amplifier's RMS power output per channel should match or slightly exceed the RMS power rating of your speakers to ensure optimal performance without distortion. Next, check the impedance (measured in ohms) of your speakers, as well as the amplifier's minimum and maximum impedance ratings. Match the speaker impedance with the appropriate amplifier channels to prevent compatibility issues. For example, if your speakers have an impedance of 4 ohms, make sure the amplifier channels for those speakers can handle a 4-ohm load. Paying attention to these specifications ensures a seamless integration of your speakers with the 4-channel amplifier.
    Yes, a 4-channel amplifier can be used to power additional speakers, such as tweeters or coaxial speakers, in your car audio system. Beyond the front and rear speakers, a 4-channel amplifier has the flexibility to accommodate additional speaker types, provided that the total load impedance and power requirements of the amplifier's channels are within its specifications. For example, if your 4-channel amplifier has two unused channels, you can use them to power additional speakers for improved sound coverage and audio performance. Be cautious not to overload the amplifier, and ensure that the speakers' impedance and power handling align with the available channels to avoid damaging the amplifier or speakers. If you have questions about expanding your audio system with a 4-channel amplifier, seek expert advice from Sonic Electronix.
    A proper and safe installation of a 4-channel amplifier is essential for optimal performance and to prevent any electrical or mechanical issues. To ensure a successful installation, start by reading the amplifier's user manual thoroughly, as it contains specific instructions and guidelines for installation. Follow all safety precautions and use the appropriate wiring and connectors rated for the amplifier's power output. Securely mount the amplifier in a well-ventilated area, away from heat sources, and avoid placing it on carpeted surfaces. Route and secure all cables carefully to avoid interference and potential hazards. Double-check all connections to ensure they are tight and secure. If you are not confident in installing the amplifier yourself, consider seeking professional installation services to ensure a safe and expertly done installation that optimizes the performance of your 4-channel amplifier and car audio system.
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