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4 Channel Amplifiers

Our 4-channel car amplifiers offer a versatile solution for powering multiple speakers and effectively balancing your audio system. A range available at the best price, from leading brands such as Soundigital, Rockford Fosgate, DD Audio, Ground Zero, Alpine, MTX, and JBL.

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4-CHANNEL AMP • SPEAKERS • CLASS D & AB • CAR AUDIO

4-Channel Car Amplifiers power your entire speaker system

Discover our Car Audio 4-channel amplifiers to power four speakers, two component kits, midranges, or woofers. From compact 4×50 W RMS to high-power 4-channel amps, find the right amplification for your setup.

4-CHANNEL CAR AMP

One amplifier for four audio channels

The 4-channel amplifier is one of the most versatile solutions in Car Audio. It can, for example, power four speakers, a front component kit and a rear pair, two pairs of midranges, or different configurations depending on the amplifier's capabilities.

4 channels Four amplified channels
Class D Compact & efficient
Class AB Many models available
Bridgeable Depending on the amplifier
WHY A 4-CHANNEL AMP?

More power for your entire system

A car stereo alone generally has limited power. A properly chosen 4-channel amplifier allows you to power several speakers separately and make the most of their potential.

4 speakers Front and rear with a single amplifier.
2 component kits Dedicated amplification for multiple channels.
Midranges & woofers High-power models for large systems.
CHOOSE BY POWER

Which 4-channel amp should you choose?

The range includes both small amplifiers for speakers and high-power models designed for Car Audio midranges and woofers.

4×50 to 4×75 W Speakers & component kits
4×100 to 4×150 W Powerful Car Audio
4×150 to 4×225 W Midranges & woofers
4×300 W and up High power

Amp 4×50 to 4×75 W RMS

4×50, 4×60, 4×70, and 4×75 W RMS amplifiers are particularly interesting for upgrading a system equipped with moderately powered speakers or component kits.

Amp 4×80 to 4×120 W RMS

4×80, 4×90, 4×95, 4×100, and 4×120 W RMS amps provide very versatile power for a more powerful daily Car Audio setup.

Amp 4×125 to 4×180 W RMS

4×125, 4×140, 4×150, 4×175 and 4×180 W RMS models are suitable for speakers, midranges, and woofers requiring more power.

Amp 4×200 to 4×450 W RMS

For high-power setups, our catalog also includes amps around 4×200, 4×225, 4×300, and up to 4×450 W RMS depending on the model and the impedance used.

4×100 W • 4×150 W • 4×225 W • 4×300 W • 4×450 W

Always compare power at the correct impedance

A 4-channel amplifier can deliver different power levels at 4 Ω and 2 Ω. A model rated at 4×200 W RMS under a certain load will not necessarily deliver that power with speakers of a different impedance.

To properly compare two amplifiers, use the RMS power ratings at the same impedance.

4 SPEAKERS

One amp for the front and rear of the car

A classic configuration is to use all four channels to separately power the front left, front right, rear left, and rear right speakers.

Front component kit speakers

Two channels can power the front channels of a component kit via its passive crossovers, depending on the system configuration.

Rear speakers

The other two channels can power a pair of rear speakers to create an amplified four-way system.

4 midranges

On high-power setups, the four channels can also power several midranges when their power and impedance are compatible.

4 woofers

The most powerful models allow you to power a large woofer or mid-bass section, with one dedicated channel per channel.

BRIDGE MODE • 4 CHANNELS → 2 CHANNELS

Can you bridge a 4-channel amplifier?

Many 4-channel amps can operate in bridged mode. Two channels are then combined to create a more powerful mono output.

Depending on the amplifier, you can use four separate channels or two bridged channel pairs. Always check the power and especially the minimum impedance allowed in bridged mode.

4×100 W RMS does not automatically mean 2×200 W RMS in bridge.

Bridged power depends on the amplifier's design. Always consult the manufacturer's specifications to find the actual power available and the minimum impedance allowed in bridged mode.

CLASS D & CLASS AB

What type of 4-channel amplifier should you choose?

4-channel Class D amp

Class D offers high electrical efficiency and can often deliver a lot of power in a relatively compact chassis.

4-channel Class AB amp

Class AB remains very popular in Car Audio amplification. The choice should be made based on performance, features, power, and the model's dimensions rather than on the amplification class alone.

BUYER'S GUIDE

How to choose your 4-channel amplifier?

First, determine what you want to amplify. You can then select the appropriate power, impedance, and features.

✓ RMS Power — compare with your speakers
✓ Impedance — check 4 Ω / 2 Ω depending on the equipment
✓ Number of Speakers — define your configuration
✓ Bridge — check bridging options
✓ Filters — HPF / LPF depending on use
✓ Dimensions — check the available space
HIGH POWER • CAR AUDIO

4-channel amps capable of powering large midranges

The 4-channel amp is not reserved for small setups. Some models deliver several hundred RMS Watts per channel and are designed to power midranges, woofers, or high-power speakers.

At these levels, the power wiring, ground, fuses, and the vehicle's electrical capacity must be sized accordingly.

More Watts does not automatically mean better sound.

Choose the power based on the speakers used. A properly sized and tuned setup is preferable to an overpowered amplifier that is poorly matched. The gain must also be set correctly to avoid clipping and damage to the speakers.

OVER 100 4-CHANNEL AMPS

From the small compact amp to the high-power model

Sound Auto Concept offers a wide selection to meet both the needs of upgrading an OEM audio system and high-power Car Audio setups.

Daily Setup Amplify the front and rear speakers.
Hi-Fi Setup Power multiple channels with dedicated amplification.
High Power Powerful models for midranges and woofers.
WIDE SELECTION OF CAR AUDIO BRANDS

ESX, Hertz, Reiss Audio, Hifonics, Rockford, Ground Zero & More

Find 4-channel amplifiers from many specialized brands: ESX Car Audio, Hertz, Reiss Audio, Hifonics, Rockford Fosgate, SounDigital, Ground Zero Audio, Audison, Deaf Bonce, DD Audio, GAS Audio Power, Alpine, DLS, Gladen, Mosconi, MTX Audio, and many more.

FREQUENTLY ASKED QUESTIONS

FAQ – 4-Channel Car Amplifiers

What is a 4-channel amplifier used for?

It can amplify four independent audio channels, for example, four speakers or two pairs of channels.

Which 4-channel amp should you choose for four speakers?

Compare the RMS power and impedance of each speaker with the power delivered by each channel of the amp at that same impedance.

Which power should you choose: 4×75, 4×100, or 4×150 W RMS?

This depends directly on the speakers. A standard component kit does not have the same needs as a high-power midrange section.

Can you connect two component kits to a 4-channel amp?

Yes, in a compatible configuration, two channels can be used for one pair of channels and the other two for the second pair.

Can you bridge a 4-channel amp?

Many models are bridgeable. However, check the bridged power and minimum impedance specified by the manufacturer.

Can you power a subwoofer with a 4-channel amp?

Some amps can use two bridged channels to power a compatible subwoofer. A mono amp is often more suitable when the subwoofer section requires a lot of power.

Class D or Class AB for a 4-channel amp?

Both can be suitable. Be sure to compare the power, efficiency, dimensions, filters, and features required for your setup.

Can a 4×300 W amp power four midranges?

Yes, if the power, impedance, and filtering are compatible with the speakers used.

What cable should you use for a 4-channel amp?

The cable gauge depends on the amp's power consumption, the cable length, and the electrical installation. Follow the manufacturer's recommendations and properly protect the power supply with a fuse.

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