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  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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Pioneer GM-A6604 Open Box Complete (Very Good, Used)

760W Peak (360W RMS) 4-Channel A Series Bridgeable Class AB 2-Ohm Stable Car Amplifier

GM-A6604 big DISCONTINUED
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Pioneer GM-A6604 Open Box Complete (Very Good, Used)

760W Peak (360W RMS) 4-Channel A Series Bridgeable Class AB 2-Ohm Stable Car Amplifier

• Item Condition: Open Box
• RMS: 60W x 4 @ 4 ohm, 90W x 4 @ 2 ohm, 180W x 2 @ 4 ohm
• Total Peak Power: 760W
• CEA-2006 Compliant
• Dimensions: 13-3/4"W x 8-1/2"L x 2-1/2"H

• Item Condition: Open Box
• RMS: 60W x 4 @ 4 ohm, 90W x 4 @ 2 ohm, 180W x 2 @ 4 ohm
• Total Peak Power: 760W
• CEA-2006 Compliant
• Dimensions: 13-3/4"W x 8-1/2"L x 2-1/2"H

Sound Storm SSL 4F400

4-Channel Force Series Amplifier

4F400 big DISCONTINUED
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Sound Storm SSL 4F400

4-Channel Force Series Amplifier

Force Series 4-Channel Class AB Car Amplifier • 50W x 4 chan. @ 4 ohm • 100W x 4 chan. Max • MOSFET Power supply • Chrome-plated RCA inputs and screw terminals

2

Force Series 4-Channel Class AB Car Amplifier • 50W x 4 chan. @ 4 ohm • 100W x 4 chan. Max • MOSFET Power supply • Chrome-plated RCA inputs and screw terminals

Boss NX2000.4

2000W Onyx Series 4-Channel MOSFET Power Amplifier with Remote Level Control

NX2000.4 big DISCONTINUED
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Boss NX2000.4

2000W Onyx Series 4-Channel MOSFET Power Amplifier with Remote Level Control

• 200W x 4-Chan. @ 4 ohm
• MOSFET PWM Power supply
• LED Indicators
• Variable 0 to +18dB Bass boost
• Variable gain controls
• Heavy duty aluminum alloy heatsink

1

• 200W x 4-Chan. @ 4 ohm
• MOSFET PWM Power supply
• LED Indicators
• Variable 0 to +18dB Bass boost
• Variable gain controls
• Heavy duty aluminum alloy heatsink

Crunch PZ1200.4

1200W PowerZone Series 4-Channel Car Audio Amplifier

PZ1200.4 big DISCONTINUED
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Crunch PZ1200.4

1200W PowerZone Series 4-Channel Car Audio Amplifier

• 1200 Watts Max
• 300 Watts x 4-Chan. @ 2 Ohm
• 4-Way System Protection
• Selectable Highpass/Lowpass Filters

2

• 1200 Watts Max
• 300 Watts x 4-Chan. @ 2 Ohm
• 4-Way System Protection
• Selectable Highpass/Lowpass Filters

Hifonics Z6400 Zeus Series

Z6400 big DISCONTINUED
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Hifonics Z6400 Zeus Series

4 Channel Amplifier • 170W RMS X 4 @ 2 • RCA Outputs • Built-In Crossover • Bass Remote Included • Hifonics Generation Heatsink Design

1

4 Channel Amplifier • 170W RMS X 4 @ 2 • RCA Outputs • Built-In Crossover • Bass Remote Included • Hifonics Generation Heatsink Design

JL Audio J2 320.4 (J2320.4)

320W RMS, J2 Series Full-Range 4-Channel Amplifier

J2-320.4 big DISCONTINUED
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JL Audio J2 320.4 (J2320.4)

320W RMS, J2 Series Full-Range 4-Channel Amplifier

J2 Series 4-Channel Class B Car Amplifier • 60W x 4 Chan. @ 4 ohm • MOSFET Power supply • Bass Boost 0-12 dB • 2/4 Channel input switch • High-pass and low-pass filters

2

J2 Series 4-Channel Class B Car Amplifier • 60W x 4 Chan. @ 4 ohm • MOSFET Power supply • Bass Boost 0-12 dB • 2/4 Channel input switch • High-pass and low-pass filters

Cadence Q4000

1600W 4-Channel Q Series Full Range Class A/B Car Amplifier

Q4000 big DISCONTINUED
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Cadence Q4000

1600W 4-Channel Q Series Full Range Class A/B Car Amplifier

• RMS: 125W x 4 @ 4 ohm, 190W x 4 @ 2 ohm, 380W x 2 @ 4 ohm Bridged
• Total Peak Power: 1600W
• High Speed MosFET Power Supply
• 16V Capable Power Supplies
• Full Range Class A/B
• BiPolar Professional Audio Grade Output Transistors
• 16.9" L x 7.9" W x 2.4 H

2

• RMS: 125W x 4 @ 4 ohm, 190W x 4 @ 2 ohm, 380W x 2 @ 4 ohm Bridged
• Total Peak Power: 1600W
• High Speed MosFET Power Supply
• 16V Capable Power Supplies
• Full Range Class A/B
• BiPolar Professional Audio Grade Output Transistors
• 16.9" L x 7.9" W x 2.4 H

SoundStorm (SSL) EVO1600.4

1600W EVOLUTION Series 4 Channel Class A/B Car Amplifier

EVO1600.4 big DISCONTINUED
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SoundStorm (SSL) EVO1600.4

1600W EVOLUTION Series 4 Channel Class A/B Car Amplifier

• 200W x 4 Chan. @ 4 Ohm
• 400W x 2 Chan. @ 2 Ohm
• 800 x 2 Chan. Bridged @ 4 Ohm
• Peak Power: 1600W
• Soft Turn-On Circuit
• Nickel-Plated Terminals
• Variable Bass EQ

2

• 200W x 4 Chan. @ 4 Ohm
• 400W x 2 Chan. @ 2 Ohm
• 800 x 2 Chan. Bridged @ 4 Ohm
• Peak Power: 1600W
• Soft Turn-On Circuit
• Nickel-Plated Terminals
• Variable Bass EQ

Earthquake Sound T2000W/4

2000W 4-Channel TNT Series Car Amplifier w/ High Level Inputs

T2000W/4 big DISCONTINUED
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Earthquake Sound T2000W/4

2000W 4-Channel TNT Series Car Amplifier w/ High Level Inputs

• 100W x 4 Chan. @ 4 ohm
• 150W x 4 Chan. @ 2 ohm
• Fully Regulated MOSFET Power Supply
• LED Power & Protect Indicators
• Variable Bass Boost
• Preamp RCA Outputs
• Heavy Duty Aluminum Alloy Heatsink
• Soft Start Turn-On

• 100W x 4 Chan. @ 4 ohm
• 150W x 4 Chan. @ 2 ohm
• Fully Regulated MOSFET Power Supply
• LED Power & Protect Indicators
• Variable Bass Boost
• Preamp RCA Outputs
• Heavy Duty Aluminum Alloy Heatsink
• Soft Start Turn-On

Hitron HKA1000.4

1000W Max Pro Series 4-Channel Class-A/B Car Amplifier with Remote Level Control

HKA1000.4 big DISCONTINUED
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Hitron HKA1000.4

1000W Max Pro Series 4-Channel Class-A/B Car Amplifier with Remote Level Control

• 1000W Max
• 125W x 4-Chan. @ 4 Ohm
• 250W x 2-Chan. RMS Bridged @ 4 Ohm
• Speaker-Level Inputs
• Wired remote bass level control included

• 1000W Max
• 125W x 4-Chan. @ 4 Ohm
• 250W x 2-Chan. RMS Bridged @ 4 Ohm
• Speaker-Level Inputs
• Wired remote bass level control included

Boss PH4.400

1600W Phantom Series 4-Channel MOSFET Class AB Car Amplifier

6-Year Manufacturer's Extended Warranty When Bought Here!

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Boss PH4.400

1600W Phantom Series 4-Channel MOSFET Class AB Car Amplifier

• 160W x 4-Chan. @ 4 ohm
• 400W x 4-Chan. Max
• MOSFET PWM Power supply
• Includes bass remote
• Trimode operation
• Thermal and speaker short protection

Promo Savings Icon

6-Year Manufacturer's Extended Warranty When Bought Here!

13

• 160W x 4-Chan. @ 4 ohm
• 400W x 4-Chan. Max
• MOSFET PWM Power supply
• Includes bass remote
• Trimode operation
• Thermal and speaker short protection

Soundstream P4.140

140W 4-Channel Picasso Series Class A/B Amplifier

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Soundstream P4.140

140W 4-Channel Picasso Series Class A/B Amplifier

• RMS Power: 25W x 4 @ 4 ohm, 35W x 4 @ 2 ohm, 70W x 2 @ 4 ohm, Bridged
• Total Peak Power: 140W
• Dash Mount Remote Bass Level Control Included
• Dimensions: 8.25"W x 6.5"L x 2"H

2

• RMS Power: 25W x 4 @ 4 ohm, 35W x 4 @ 2 ohm, 70W x 2 @ 4 ohm, Bridged
• Total Peak Power: 140W
• Dash Mount Remote Bass Level Control Included
• Dimensions: 8.25"W x 6.5"L x 2"H

MB Quart ZA2-1600.4 4-Channel + Premium 4 Gauge Amp Kit and 2.0 Farad Capacitor

Includes 1600W RMS 4-Channel, Amp Wiring Kit and Capacitor

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MB Quart ZA2-1600.4 4-Channel + Premium 4 Gauge Amp Kit and 2.0 Farad Capacitor

Includes 1600W RMS 4-Channel, Amp Wiring Kit and Capacitor

• FEATURE 1
• FEATURE 2
• FEATURE 3
• FEATURE 4
• FEATURE 5
• FEATURE 6
• FEATURE 7

66

• FEATURE 1
• FEATURE 2
• FEATURE 3
• FEATURE 4
• FEATURE 5
• FEATURE 6
• FEATURE 7

Audison LRx 4.300

High-fidelity, 4-Channel LRx Series Amplifier

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Audison LRx 4.300

High-fidelity, 4-Channel LRx Series Amplifier

High Power 4-Channel Amplifier • 65W x 4 chan. @ 4 Ohm • 105W x 4 chan. @ 2 Ohm • MOSFET power supply • 2-way Butterworth crossover • RGP circuit • compact design • Darlington configuration

High Power 4-Channel Amplifier • 65W x 4 chan. @ 4 Ohm • 105W x 4 chan. @ 2 Ohm • MOSFET power supply • 2-way Butterworth crossover • RGP circuit • compact design • Darlington configuration

Alpine MRP-F550

500W RMS, 4-Channel Amplifier

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Alpine MRP-F550

500W RMS, 4-Channel Amplifier

500 watts, 4-Channel Amplifier • RMS Power Output: 4 ohm: 90 watts x 4 / 125 watts x 4 • Frequency Response: 10 Hz - 50 kHz • MOSFET power supply • STAR Topology (minimizes internal noise and prevents ground interference) • Speaker and preamp-level inputs

7

500 watts, 4-Channel Amplifier • RMS Power Output: 4 ohm: 90 watts x 4 / 125 watts x 4 • Frequency Response: 10 Hz - 50 kHz • MOSFET power supply • STAR Topology (minimizes internal noise and prevents ground interference) • Speaker and preamp-level inputs

Massive Audio BP2000.4

2000W Max Blade BP Series 4-Channel Class-D Amplifier w/ Remote Level Control

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Massive Audio BP2000.4

2000W Max Blade BP Series 4-Channel Class-D Amplifier w/ Remote Level Control

• 120W RMS x 4 @ 4 ohm
• 240 RMS x 4 @ 2 ohm
• Total Peak Power: 2000 Watts
• CTA-2006 Compliant
• Built-In OEM Line Converter
• Aluminum Heatsink
• Dimensions: 7.1" W x 13.4" L x 2" H

• 120W RMS x 4 @ 4 ohm
• 240 RMS x 4 @ 2 ohm
• Total Peak Power: 2000 Watts
• CTA-2006 Compliant
• Built-In OEM Line Converter
• Aluminum Heatsink
• Dimensions: 7.1" W x 13.4" L x 2" H

Dual XDVD210BT

Double DIN Bluetooth In-Dash DVD/CD/AM/FM/Digital Media Car Stereo Receiver w/ 6.2” Digital TFT Touch Screen

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Dual XDVD210BT

Double DIN Bluetooth In-Dash DVD/CD/AM/FM/Digital Media Car Stereo Receiver w/ 6.2” Digital TFT Touch Screen

• 60W x 4, Max
• 6.2" Touchscreen
• In-dash DVD playback
• Front USB port
• Bluetooth music streaming and hands-free talking

• 60W x 4, Max
• 6.2" Touchscreen
• In-dash DVD playback
• Front USB port
• Bluetooth music streaming and hands-free talking

Boss D250.4

1000W Max, 4-Channel Diablo Series Amplifier (D2504)

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Boss D250.4

1000W Max, 4-Channel Diablo Series Amplifier (D2504)

Diablo Series 4-Channel Class AB Car Amplifier • 100W x 4 chan. @ 4 ohm • 250W x 4 chan. Max • MOSFET power supply • Remote subwoofer level control • LED power and protection indicators • Variable high/low pass crossovers

1

Diablo Series 4-Channel Class AB Car Amplifier • 100W x 4 chan. @ 4 ohm • 250W x 4 chan. Max • MOSFET power supply • Remote subwoofer level control • LED power and protection indicators • Variable high/low pass crossovers

Soundstream DTR4.500

500W RMS, D-Tower Series 4-Channel Power Amplifier

DTR4.500 big DISCONTINUED
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Soundstream DTR4.500

500W RMS, D-Tower Series 4-Channel Power Amplifier

D-Tower Series 4-Channel Class A/B Car Amplifier • 125W x 4 Chan. @ 2 Ohm • 80W x 4 Chan. @ 4 Ohm • Double Side PCB And SMD Components • Remote Bass Level Input • Gloss Black Finish • 3-Way System Protection Circuitry

D-Tower Series 4-Channel Class A/B Car Amplifier • 125W x 4 Chan. @ 2 Ohm • 80W x 4 Chan. @ 4 Ohm • Double Side PCB And SMD Components • Remote Bass Level Input • Gloss Black Finish • 3-Way System Protection Circuitry

Alpine MRV-F540

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Alpine MRV-F540

80W x 4 Car Amp • 100 watts RMS x 4 at 2 ohm • BassEngine® with variable high- and low-pass crossovers • preamp outputs

2

80W x 4 Car Amp • 100 watts RMS x 4 at 2 ohm • BassEngine® with variable high- and low-pass crossovers • preamp outputs

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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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