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

Discontinued 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.
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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.
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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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You are currently viewing discontinued products.

Orion CB3400.4

Orion Cobalt 4 Channel Amplifier 6800W MAX

CB3400.4 big DISCONTINUED
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Orion CB3400.4

Orion Cobalt 4 Channel Amplifier 6800W MAX

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Orion CB600.4

Orion Cobalt 4 Channel Amplifier 1200W MAX

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Orion CB600.4

Orion Cobalt 4 Channel Amplifier 1200W MAX

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Image Dynamics SQ1200.41d_duplicate

_W Peak (__W RMS) SQ Series Class-D 4-Channel 1-Ohm Stable Amplifier with Remote Level Control/Bass Knob Included

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Image Dynamics SQ1200.41d_duplicate

_W Peak (__W RMS) SQ Series Class-D 4-Channel 1-Ohm Stable Amplifier with Remote Level Control/Bass Knob Included

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Orion HCCA3000.4H

Orion HCCA 4 Channel Amplifier

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Orion HCCA3000.4H

Orion HCCA 4 Channel Amplifier

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Orion HCCA4000.4H

Orion HCCA 4 Channel Amplifier 8000W Max

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Orion HCCA4000.4H

Orion HCCA 4 Channel Amplifier 8000W Max

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DB Drive A3 65.4

180W RMS 4-Channel Class AB A3 Series Car Amplifier

A3 65.4 big DISCONTINUED
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DB Drive A3 65.4

180W RMS 4-Channel Class AB A3 Series Car Amplifier

• 45W x 4 Chan. @ 4 ohm
• Max 65W x 4 Chan. @ 2 ohm
• Max 120W x 4 Chan. @ 2 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 8 Gauge Power and Ground Inputs
• DriveSink Heat Management System

• 45W x 4 Chan. @ 4 ohm
• Max 65W x 4 Chan. @ 2 ohm
• Max 120W x 4 Chan. @ 2 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 8 Gauge Power and Ground Inputs
• DriveSink Heat Management System

Audiopipe APMI-4090

1300W 4 Channel APMI Series Class AB Amplifier

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Audiopipe APMI-4090

1300W 4 Channel APMI Series Class AB Amplifier

• RMS Power: 100W x 4 @ 4 ohm, 130W x 4 @ 2 ohm
• Total Peak Power: 1300W
• Variable Low-Pass Filter (50-1,200 Hz)
• Dimensions: 6.5" W x 9.9" L x 2.2" H

• RMS Power: 100W x 4 @ 4 ohm, 130W x 4 @ 2 ohm
• Total Peak Power: 1300W
• Variable Low-Pass Filter (50-1,200 Hz)
• Dimensions: 6.5" W x 9.9" L x 2.2" H

New Hifonics Zeus ZXX-2000.4 2000 Watt RMS 4-Channel Car Audio Amplifier+Amp Kit

2000W Peak Zeus Series Class-A/B 4-Channel 2-Ohm Stable Amplifier (ZXX-20004) + Complete 4 Gauge Amplifier Wiring Kit Package

ZXX-2000.4, BAK44 big DISCONTINUED
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New Hifonics Zeus ZXX-2000.4 2000 Watt RMS 4-Channel Car Audio Amplifier+Amp Kit

2000W Peak Zeus Series Class-A/B 4-Channel 2-Ohm Stable Amplifier (ZXX-20004) + Complete 4 Gauge Amplifier Wiring Kit Package

• 250 Watts Peak x 4 @ 4 ohm
• 500 Watts Peak x 4 @ 2 ohm
• Total Peak Power: 2,000 Watts
• High- and Low-Pass Filterse
• Variable Bass Boost
• Aluminum Heatsink
• 22" W x 10" L x 6" H

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• 250 Watts Peak x 4 @ 4 ohm
• 500 Watts Peak x 4 @ 2 ohm
• Total Peak Power: 2,000 Watts
• High- and Low-Pass Filterse
• Variable Bass Boost
• Aluminum Heatsink
• 22" W x 10" L x 6" H

Audiopipe APDL-2504

640W Dealer Line Series 4-Channel Class AB Car Amplifier

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Audiopipe APDL-2504

640W Dealer Line Series 4-Channel Class AB Car Amplifier

• RMS Power: 110W x 4 @ 4 ohm, 160W x 4 @ 2 ohm, 300W x 2 @ 4 ohm Bridged
• Total Peak Power: 2100W
• Variable Low-Pass Filter
• Dimensions: 6.92"W x 15.11"L x 2.16"H

• RMS Power: 110W x 4 @ 4 ohm, 160W x 4 @ 2 ohm, 300W x 2 @ 4 ohm Bridged
• Total Peak Power: 2100W
• Variable Low-Pass Filter
• Dimensions: 6.92"W x 15.11"L x 2.16"H

Crunch PD4000.4 4000w 4-Channel Pro Power Car Audio Amplifier Class AB+Amp Kit

4000W Max Power Drive Series 4-channel Bridgeable Car Amplifier - Pro Power Edition + Complete 4 Gauge Amplifier Wiring Kit Package

PD 4000.4 Pro Power, BAK42 big DISCONTINUED
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Crunch PD4000.4 4000w 4-Channel Pro Power Car Audio Amplifier Class AB+Amp Kit

4000W Max Power Drive Series 4-channel Bridgeable Car Amplifier - Pro Power Edition + Complete 4 Gauge Amplifier Wiring Kit Package

• 250 Watts RMS x 4 @ 4 ohm
• 500 Watts RMS x 4 @ 2 ohm
• 1000 Watts RMS x 2 @ 4 ohm Bridged
• Total Peak Power: 4000 Watts
• Variable high-pass filter: 60 - 1200 Hz
• Variable low-pass filter: 30 - 250 Hz
• Variable Bass Boost: 0 to +9 dB bass boost
• Dimensions: 11.4"W x 20"L x 3.8"H

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• 250 Watts RMS x 4 @ 4 ohm
• 500 Watts RMS x 4 @ 2 ohm
• 1000 Watts RMS x 2 @ 4 ohm Bridged
• Total Peak Power: 4000 Watts
• Variable high-pass filter: 60 - 1200 Hz
• Variable low-pass filter: 30 - 250 Hz
• Variable Bass Boost: 0 to +9 dB bass boost
• Dimensions: 11.4"W x 20"L x 3.8"H

MTX XTHUNDER125.4 with XKIT44

500W RMS XThunder Series 4-Channel Class AB Amplifier + FREE 100% Copper, 4-Chan. True Spec 4 Gauge Amp Installation Kit

No picture DISCONTINUED
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MTX XTHUNDER125.4 with XKIT44

500W RMS XThunder Series 4-Channel Class AB Amplifier + FREE 100% Copper, 4-Chan. True Spec 4 Gauge Amp Installation Kit

• RMS Power: 90W x 4 @ 4 ohm, 125W x 4 @ 2 ohm
• RMS Power: 500W
• CEA-2006 Compliant/Preamp Outputs/LPF
• Dimensions: 8.93" W x 14.17" L x 2.03" H
• 4 Gauge 4-Channel X-Series Complete Amplifier Installation Kit

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• RMS Power: 90W x 4 @ 4 ohm, 125W x 4 @ 2 ohm
• RMS Power: 500W
• CEA-2006 Compliant/Preamp Outputs/LPF
• Dimensions: 8.93" W x 14.17" L x 2.03" H
• 4 Gauge 4-Channel X-Series Complete Amplifier Installation Kit

Focal IMPULSE4.320

Plug & Play Line Compact 4-Channel Digital Amplifier

IMPULSE 4.320 big DISCONTINUED
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Focal IMPULSE4.320

Plug & Play Line Compact 4-Channel Digital Amplifier

• 55 Watts RMS x 4 @ 4 ohm
• 80 Watts RMS x 4 @ 2 ohm
• Ultra-compact – Easy to install
• CEA-2006 Compliant/Preamp Outputs/LPF
• Compatible with all head units (OEM and after-market)
• Automatic start-up with your original head unit
• Dimensions: 6-15/16"W x 1-7/8"H x 2-5/8"D

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• 55 Watts RMS x 4 @ 4 ohm
• 80 Watts RMS x 4 @ 2 ohm
• Ultra-compact – Easy to install
• CEA-2006 Compliant/Preamp Outputs/LPF
• Compatible with all head units (OEM and after-market)
• Automatic start-up with your original head unit
• Dimensions: 6-15/16"W x 1-7/8"H x 2-5/8"D

Focal FDS4.350

Compact 4-Channel Class D Car Amplifier (100 W RMS x 4 at 2 Ohms)

FDS 4.350 big DISCONTINUED
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Focal FDS4.350

Compact 4-Channel Class D Car Amplifier (100 W RMS x 4 at 2 Ohms)

• Compact 4-Channel Class D Amplifier
• 58 W RMS x 4 at 4 Ohm (100 watts RMS x 4 at 2 Ohm)
• 200 W RMS x 2 at 4 ohm (Bridged)
• Direct Fet ® Technology – Efficient heat dissipation and precision
• Stackable aluminium chassis with high heat dissipation

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VIP Product Get $44.00 in rewards to spend later

• Compact 4-Channel Class D Amplifier
• 58 W RMS x 4 at 4 Ohm (100 watts RMS x 4 at 2 Ohm)
• 200 W RMS x 2 at 4 ohm (Bridged)
• Direct Fet ® Technology – Efficient heat dissipation and precision
• Stackable aluminium chassis with high heat dissipation

Focal FPX4.400SQ

4-Channel Class AB Amplifier (4 x 70W RMS @ 4 ohms)

FPX 4.400 SQ big DISCONTINUED
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Focal FPX4.400SQ

4-Channel Class AB Amplifier (4 x 70W RMS @ 4 ohms)

• 4-Channel Class AB Amplifier
• 120W RMS x 4 at 4 ohm
• 185 W RMS x 4 at 2 ohm
• Bridged mode (4 Ohm): 370W RMS x 2
• Very small size for amount of power output
• Audiophile Sanken Transistors

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• 4-Channel Class AB Amplifier
• 120W RMS x 4 at 4 ohm
• 185 W RMS x 4 at 2 ohm
• Bridged mode (4 Ohm): 370W RMS x 2
• Very small size for amount of power output
• Audiophile Sanken Transistors

Infinity Reference 3004A (REFERENCE3004A)

400W RMS Class H Reference Series 4 Channel Car Amplifier

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Infinity Reference 3004A (REFERENCE3004A)

400W RMS Class H Reference 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 H 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 H 2 ohm Stable 4-Channel Amplifier

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    FAQ Frequently asked questions in Discontinued 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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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

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