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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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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.
Zeus Series (30)
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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.

Hifonics TXi 4408

440W RMS, 4-Channel Titan TXi Series Amplifier (TXi4408)

TXi4408 big DISCONTINUED
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Hifonics TXi 4408

440W RMS, 4-Channel Titan TXi Series Amplifier (TXi4408)

4-Channel Class AB Car Amplifier • 55W x 4 chan. @ 4 ohm • 110W x 4 chan. @ 2 ohm • 220W x 2 chan. Max • MOSFET EXVP power supply • Variable bass boost: 10dB bass equalization • SPC Twin turbo toroids • 2/3/4-Channel operation

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4-Channel Class AB Car Amplifier • 55W x 4 chan. @ 4 ohm • 110W x 4 chan. @ 2 ohm • 220W x 2 chan. Max • MOSFET EXVP power supply • Variable bass boost: 10dB bass equalization • SPC Twin turbo toroids • 2/3/4-Channel operation

Cerwin-Vega Vega V400.4

4-Channel Amplifier (Vega 400.4)

Vega-400.4 big DISCONTINUED
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Cerwin-Vega Vega V400.4

4-Channel Amplifier (Vega 400.4)

Vega Series 4-Channel Class AB Car Amplifier • 60W x 4 chan. @ 4 ohm • 100W x 4 chan. @ 2 ohm • 200W x 2 chan. @ 4 ohm bridged • Pulse with modulated (PWM) MOSFET Power supply • Tuned Bass EQ (0-12 dB bass boost at 45 Hz)

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Vega Series 4-Channel Class AB Car Amplifier • 60W x 4 chan. @ 4 ohm • 100W x 4 chan. @ 2 ohm • 200W x 2 chan. @ 4 ohm bridged • Pulse with modulated (PWM) MOSFET Power supply • Tuned Bass EQ (0-12 dB bass boost at 45 Hz)

Memphis Marine 16-MA3004

460W RMS, 4-Channel Marine MClass Amplifier

16-MA3004 big DISCONTINUED
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Memphis Marine 16-MA3004

460W RMS, 4-Channel Marine MClass Amplifier

Memphis Marine Series 4-Channel Class AB Marine Amplifier • 75W x 4 chan. @ 4 ohm • 115W x 4 chan. @ 2 ohm • 300W x 4 chan. Max • MOSFET power supply • Conformal circuit board coating for anti-corrosion protection

Memphis Marine Series 4-Channel Class AB Marine Amplifier • 75W x 4 chan. @ 4 ohm • 115W x 4 chan. @ 2 ohm • 300W x 4 chan. Max • MOSFET power supply • Conformal circuit board coating for anti-corrosion protection

Sound Storm SSL F4.800 R/B

800W Max, 4-Channel Amplifier

F4.800 big DISCONTINUED
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Sound Storm SSL F4.800 R/B

800W Max, 4-Channel Amplifier

Force Series 4-Channel Class A/B Amplifier • 85 Watts x 4 Chan @ 4 Ohm • Line and Speaker-Level Inputs • 800 Watts Max • Chrome-Plated RCA Level Inputs And Screw Terminals • LED Power And Protect Indicators

Force Series 4-Channel Class A/B Amplifier • 85 Watts x 4 Chan @ 4 Ohm • Line and Speaker-Level Inputs • 800 Watts Max • Chrome-Plated RCA Level Inputs And Screw Terminals • LED Power And Protect Indicators

Crunch PZX900.4 (Factory Refurbished)

900W 4-Channel Powerzone Series Class AB Car Amplifier

PZX900.4 big DISCONTINUED
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Crunch PZX900.4 (Factory Refurbished)

900W 4-Channel Powerzone Series Class AB Car Amplifier

• Max Power: 115W x 4 @ 4 ohm, 225W x 4 @ 2 ohm, 450W x 2 @ 4 ohm Mono Bridged
• Total Peak Power: 900W
• Rugged MOSFET Pulse Width Modulation Power Supply
• Speaker-level (high-level) inputs
• Preamp RCA outputs to daisy chain multiple amps
• Frequency Response: 10 - 45,000 Hz

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• Max Power: 115W x 4 @ 4 ohm, 225W x 4 @ 2 ohm, 450W x 2 @ 4 ohm Mono Bridged
• Total Peak Power: 900W
• Rugged MOSFET Pulse Width Modulation Power Supply
• Speaker-level (high-level) inputs
• Preamp RCA outputs to daisy chain multiple amps
• Frequency Response: 10 - 45,000 Hz

MB Quart OA800.4 (Factory Refurbished)

800W 4-Channel Onyx Series Class SQ Full Range Bridgeable Power Amplifier

OA800.4 big DISCONTINUED
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MB Quart OA800.4 (Factory Refurbished)

800W 4-Channel Onyx Series Class SQ Full Range Bridgeable Power Amplifier

• 100W x 4-Chan. @ 4 ohm
• 200W x 4-Chan. @ 2 ohm
• 400W x 2 Chan. @ 4 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• FLUID-FETS Circuit for Smooth Sound Quality

1

• 100W x 4-Chan. @ 4 ohm
• 200W x 4-Chan. @ 2 ohm
• 400W x 2 Chan. @ 4 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• FLUID-FETS Circuit for Smooth Sound Quality

Sony XM-GS400 with $200 eGift Card

$200 eGift Card Included! 320W 4-Channel GS Series Compact Car Amplifier

XM-GS400 Plus eGift Card big DISCONTINUED
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Sony XM-GS400 with $200 eGift Card

$200 eGift Card Included! 320W 4-Channel GS Series Compact Car Amplifier

• 4 ohm: 70 watts x 4-Chan.
• 2 ohm: 80 watts x 4-Chan.
• Bridged, 4 ohm: 160 watts x 2 chan.
• Pulse Width Modulated MOSFET Power Supply
• LED Power (green) and Protect (red) Indicators

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• 4 ohm: 70 watts x 4-Chan.
• 2 ohm: 80 watts x 4-Chan.
• Bridged, 4 ohm: 160 watts x 2 chan.
• Pulse Width Modulated MOSFET Power Supply
• LED Power (green) and Protect (red) Indicators

Alpine MRP-F450 Factory R/B

REFURBISHED UNIT MISSING BOX AND ENDCAPS

MRP-F450 big DISCONTINUED
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Alpine MRP-F450 Factory R/B

REFURBISHED UNIT MISSING BOX AND ENDCAPS

4-channel car amplifier • 70W RMS x 4 @ 4 ohm • 100W RMS x 4 @ 2 ohm • 200W RMS x 2 bridged output @ 4 ohm • Gold-plated screw terminals

4-channel car amplifier • 70W RMS x 4 @ 4 ohm • 100W RMS x 4 @ 2 ohm • 200W RMS x 2 bridged output @ 4 ohm • Gold-plated screw terminals

Crunch PZ900.4 (Factory Refurbished)

900W PowerZone Series 4-Channel Car Audio Amplifier

PZ900.4 big DISCONTINUED
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Crunch PZ900.4 (Factory Refurbished)

900W PowerZone Series 4-Channel Car Audio Amplifier

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

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

Massive Audio PX4S (Like New (Open Box))

960W RMS Class D PRIMO Series 4 Channel Car Amplifier

PX4S big DISCONTINUED
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Massive Audio PX4S (Like New (Open Box))

960W RMS Class D PRIMO Series 4 Channel Car Amplifier

• 150 watts x 4 channel @ 4 ohm
• 240 watts x 4 channel @ 2 ohm
• Bridged: 480 watts x 2 channel @ 4 ohm
• Total RMS Power: 960 watts
• Class D 2 ohm Stable 4-Channel Amplifier

• 150 watts x 4 channel @ 4 ohm
• 240 watts x 4 channel @ 2 ohm
• Bridged: 480 watts x 2 channel @ 4 ohm
• Total RMS Power: 960 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Soundstream PCA4.400 R/B

400W RMS, 4-Channel Picasso Series Amplifier

PCA4.400 big DISCONTINUED
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Soundstream PCA4.400 R/B

400W RMS, 4-Channel Picasso Series Amplifier

4-Channel Picasso Series Amplifier • 40W RMS x 4 @ 4 • 130W RMS x 2 Bridged • High & Low Inputs • Line Out • PWM MOSFET Circutry • Tri-Guard • Tri-Mode Operation • Phase Inversion Switch

4-Channel Picasso Series Amplifier • 40W RMS x 4 @ 4 • 130W RMS x 2 Bridged • High & Low Inputs • Line Out • PWM MOSFET Circutry • Tri-Guard • Tri-Mode Operation • Phase Inversion Switch

Massive Audio D 8004 Open Box

Open Box 960W Max, 4 Channel D Block Series Car Amplifier

D 8004 big DISCONTINUED
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Massive Audio D 8004 Open Box

Open Box 960W Max, 4 Channel D Block Series Car Amplifier

Massive Audio 800.4 D Block Series 4-Channel Car Amplifier • 960 Watts Max • 480 Watts RMS • MOSFET power Supply • Brushed Aluminum "finless" Heat Sink • 6-Way Protection Circuitry

Massive Audio 800.4 D Block Series 4-Channel Car Amplifier • 960 Watts Max • 480 Watts RMS • MOSFET power Supply • Brushed Aluminum "finless" Heat Sink • 6-Way Protection Circuitry

Power Acoustik SL4-1000 R/B

1000W Max, 4-Channel Amplifier

SL4-1000 big DISCONTINUED
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Power Acoustik SL4-1000 R/B

1000W Max, 4-Channel Amplifier

1000W Max, 4-Channel Amplifier • RCA input & output • 2 ohm STERO / 4 ohm MONO • P.W.M MOSFET power supply • oft Delayed remote turn-on • Color indicator L.E.D • Phantom Channel for power center speaker or subwoofer

1000W Max, 4-Channel Amplifier • RCA input & output • 2 ohm STERO / 4 ohm MONO • P.W.M MOSFET power supply • oft Delayed remote turn-on • Color indicator L.E.D • Phantom Channel for power center speaker or subwoofer

RE Audio DTS-500.4 R/B

400W, 4-Channel Class A/B DTS Series Car Amplifier

DTS-500.4 big DISCONTINUED
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RE Audio DTS-500.4 R/B

400W, 4-Channel Class A/B DTS Series Car Amplifier

DTS Series 4-Channel Class A/B Car Amplifier • 400W Dynamic • 2-Way System Protection • Brushed Aluminum Alloy Convection Cooled Heatsink • Variable High/Low-Pass Filter • Selectable Bass Boost

DTS Series 4-Channel Class A/B Car Amplifier • 400W Dynamic • 2-Way System Protection • Brushed Aluminum Alloy Convection Cooled Heatsink • Variable High/Low-Pass Filter • Selectable Bass Boost

Hifonics ZRX1000.4 (Factory Refurbished)

1000W 4-Channel Class A/B Zeus Series Car Amplifier

ZRX1000.4 big DISCONTINUED
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Hifonics ZRX1000.4 (Factory Refurbished)

1000W 4-Channel Class A/B Zeus Series Car Amplifier

Item Condition: Factory Refurbished
• 4 ohm: 125 watts x 4-Chan.
• 2 ohm: 250 watts x 4-Chan.
• Pulse Width Modulated MOSFET Power Supply
• CEA-2006 Compliant Amplifier

Item Condition: Factory Refurbished
• 4 ohm: 125 watts x 4-Chan.
• 2 ohm: 250 watts x 4-Chan.
• Pulse Width Modulated MOSFET Power Supply
• CEA-2006 Compliant Amplifier

Power Acoustik GT4-1200 OPEN BOX COMPLETE

1200W 4-Channel Gothic Series Class AB Car Amplifier

GT4-1200 big DISCONTINUED
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Power Acoustik GT4-1200 OPEN BOX COMPLETE

1200W 4-Channel Gothic Series Class AB Car Amplifier

Item has been opened, used, and previously installed
• 4 ohm: 100 watts x 4-Chan.
• 2 ohm: 125 watts x 4-Chan.
• Bridged, 4 ohm: 250 watts x 2 chan.
• Max power output: 1200 watts

Item has been opened, used, and previously installed
• 4 ohm: 100 watts x 4-Chan.
• 2 ohm: 125 watts x 4-Chan.
• Bridged, 4 ohm: 250 watts x 2 chan.
• Max power output: 1200 watts

MB Quart DSC 450 Open Box

(Open Box) 400W RMS, Class A/B 4-Channel Discus Series Amplifier (DSC450)

DSC-450 big DISCONTINUED
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MB Quart DSC 450 Open Box

(Open Box) 400W RMS, Class A/B 4-Channel Discus Series Amplifier (DSC450)

Discus Series 4-Channel Class AB Car Amplifier • 50W x 4 Chan. @ 4 Ohm • 100W x 4 Chan. @ 2 Ohm • 200W x 2 Chan. @ 4 Ohm • Preamp RCA Outputs • Switchable 2-Channel/4-Channel Input Modes

Discus Series 4-Channel Class AB Car Amplifier • 50W x 4 Chan. @ 4 Ohm • 100W x 4 Chan. @ 2 Ohm • 200W x 2 Chan. @ 4 Ohm • Preamp RCA Outputs • Switchable 2-Channel/4-Channel Input Modes

Orion CO600.4- Open Box

320W Cobalt Series 4-Channel Stereo Bridgeable Car Amplifier

CO600.4-2 big DISCONTINUED
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Orion CO600.4- Open Box

320W Cobalt Series 4-Channel Stereo Bridgeable Car Amplifier

• Cobalt 4-Channel Class A/B Car Amplifier
• 60 Watts x 4-Chan. @ 4 Ohm
• 80 Watts x 4-Chan. @ 2 Ohm
• 600 Watts Max
• Tri-Mode Capable
• High-Level Inputs
• Selectable Bass Boost
• LED Power/Protect Indicators

• Cobalt 4-Channel Class A/B Car Amplifier
• 60 Watts x 4-Chan. @ 4 Ohm
• 80 Watts x 4-Chan. @ 2 Ohm
• 600 Watts Max
• Tri-Mode Capable
• High-Level Inputs
• Selectable Bass Boost
• LED Power/Protect Indicators

Absolute PRO 2000.4

2000W Max, 4-Channel Digital Pro Series Amplifier

PRO2000.4 big DISCONTINUED
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Absolute PRO 2000.4

2000W Max, 4-Channel Digital Pro Series Amplifier

Digital Pro Series 4-Channel Car Amplifier • Class AB • 250 Watts x 4 chan. @ 2 ohm • 2000 Watts Max • Enhanced Bass EQ • Bridgeable and Tri-Operational Mode • Soft Start and Muting

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Digital Pro Series 4-Channel Car Amplifier • Class AB • 250 Watts x 4 chan. @ 2 ohm • 2000 Watts Max • Enhanced Bass EQ • Bridgeable and Tri-Operational Mode • Soft Start and Muting

Crunch DRA4050.4-OPEN BOX

4000W V-Drive Series 4-Channel Car Audio Amplifier

DRA4050.4 big DISCONTINUED
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Crunch DRA4050.4-OPEN BOX

4000W V-Drive Series 4-Channel Car Audio Amplifier

• 4000 Watts Max
• 1000 Watts x 4-Chan. @ 2 Ohm
• 3-Way System Protection
• Selectable Highpass/Lowpass Filters

• 4000 Watts Max
• 1000 Watts x 4-Chan. @ 2 Ohm
• 3-Way System Protection
• Selectable Highpass/Lowpass Filters

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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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