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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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You are currently viewing discontinued products.

Kenwood KAC-8452 R/B

FACTORY REFURBISHED

KAC-8452 big DISCONTINUED
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Kenwood KAC-8452 R/B

FACTORY REFURBISHED

4-Channel Power Amplifier • Variable Crossover • High and Low Level Inputs • 70W RMS x 4 @ 4 • 100W RMS x 4 @ 2 • 1 Pair RCA Outputs • 0 -18/dB Bass Boost

4-Channel Power Amplifier • Variable Crossover • High and Low Level Inputs • 70W RMS x 4 @ 4 • 100W RMS x 4 @ 2 • 1 Pair RCA Outputs • 0 -18/dB Bass Boost

Clarion XC1410-OPEN BOX

300W XC Series Micro 4-Channel Class-D Compact Design Car Amplifier

XC1410 big DISCONTINUED
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Clarion XC1410-OPEN BOX

300W XC Series Micro 4-Channel Class-D Compact Design Car Amplifier

• 50W x 4-Chan. @ 4 ohm
• 75W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4-Channel Operation
• 8 Gauge Power and Ground Inputs
• Micro Size Amplifier for Maximizing Space Saving Applications

• 50W x 4-Chan. @ 4 ohm
• 75W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4-Channel Operation
• 8 Gauge Power and Ground Inputs
• Micro Size Amplifier for Maximizing Space Saving Applications

Alpine PDX-F6

600W RMS, PDX Series 4-Channel Power Density Digital Amplifier

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Alpine PDX-F6

600W RMS, PDX Series 4-Channel Power Density Digital Amplifier

PDX Series 4-Channel Car Amplifier • Class D • 600 Watts RMS • 150 Watts x 4 Chan. RMS • Variable High-Pass and Low-Pass Filter • Blue LED Power/Status Indicator • Compact Size

PDX Series 4-Channel Car Amplifier • Class D • 600 Watts RMS • 150 Watts x 4 Chan. RMS • Variable High-Pass and Low-Pass Filter • Blue LED Power/Status Indicator • Compact Size

Soundstream PCA4.520 R/B

520W RMS, 4-Channel Picasso Series Amplifier

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Soundstream PCA4.520 R/B

520W RMS, 4-Channel Picasso Series Amplifier

4-Channel Picasso Series Amplifier • 80W RMS x 4 @ 4 • 260W x 2 RMS Bridged • High & Low Inputs • Line Out • PWM MOSFET Circutry • Tri-Guard • Tri-Mode Operation • Phase Inversion Switch

4-Channel Picasso Series Amplifier • 80W RMS x 4 @ 4 • 260W x 2 RMS Bridged • High & Low Inputs • Line Out • PWM MOSFET Circutry • Tri-Guard • Tri-Mode Operation • Phase Inversion Switch

Crunch PDX-1000.4 + Complete 4 AWG Amp Kit

1000W Max PDX Series Bridgeable 4-Channel Class A/B Car Amplifier + Amp Kit

PDX-1000.4_BAK44 big DISCONTINUED
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Crunch PDX-1000.4 + Complete 4 AWG Amp Kit

1000W Max PDX Series Bridgeable 4-Channel Class A/B Car Amplifier + Amp Kit

Power One Series 4-Channel Class A/B Car Amplifier • 1000W Max • 500W x 2-Chan @ 1 Ohm • SEPP Analog Amplifier • Variable Bass Boost • Speaker-Level Inputs • Preamp RCA Outputs • 3-Way System Protection Circuitry • Complete 4 Gauge 4-Channel Amplifier Installation Kit

Power One Series 4-Channel Class A/B Car Amplifier • 1000W Max • 500W x 2-Chan @ 1 Ohm • SEPP Analog Amplifier • Variable Bass Boost • Speaker-Level Inputs • Preamp RCA Outputs • 3-Way System Protection Circuitry • Complete 4 Gauge 4-Channel Amplifier Installation Kit

Hifonics ZRX600.4 OPEN BOX COMPLETE

600W 4-Channel Class A/B Zeus Series Car Amplifier

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Hifonics ZRX600.4 OPEN BOX COMPLETE

600W 4-Channel Class A/B Zeus Series Car Amplifier

• 4 ohm: 75 watts x 4-Chan.
• 2 ohm: 150 watts x 4-Chan.
• Bridged, 4 ohm: 300 watts x 2 chan.
• Pulse Width Modulated MOSFET power supply

• 4 ohm: 75 watts x 4-Chan.
• 2 ohm: 150 watts x 4-Chan.
• Bridged, 4 ohm: 300 watts x 2 chan.
• Pulse Width Modulated MOSFET power supply

EXCLUSIVE

Alpine Speakers + Kicker Amplifier Bundle

5-1/4" Alpine SPS-510 Type S Series Speakers + Kicker 11DX400.4 4 Chan. Amp + Kit + Sound Dampening

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Alpine Speakers + Kicker Amplifier Bundle

5-1/4" Alpine SPS-510 Type S Series Speakers + Kicker 11DX400.4 4 Chan. Amp + Kit + Sound Dampening

5-1/4" Type S Series Car Speakers • 340W Max • 110W RMS • DX Series 4-Channel Class AB Car Amplifier • MOSFET Power Supply • Fail-Safe Integration Technology • Amplifier Kit • Sound Dampening Material

5-1/4" Type S Series Car Speakers • 340W Max • 110W RMS • DX Series 4-Channel Class AB Car Amplifier • MOSFET Power Supply • Fail-Safe Integration Technology • Amplifier Kit • Sound Dampening Material

Cadence QRS 4.125GH

800W RMS QRS Series 2 ohm Stable 4-Channel Class-GH Amplifier

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Cadence QRS 4.125GH

800W RMS QRS Series 2 ohm Stable 4-Channel Class-GH Amplifier

• 125 Watts RMS x 4 @ 4 ohm
• 200 Watts RMS x 4 @ 2 ohm
• 400 Watts RMS x 2 @ 4 ohm, Bridged
• High and Low Pass Filters
• 0-15dB
• Aluminum Heatsink
• Dimensions: 17.6" W x 7.56" L x 2.32" H

• 125 Watts RMS x 4 @ 4 ohm
• 200 Watts RMS x 4 @ 2 ohm
• 400 Watts RMS x 2 @ 4 ohm, Bridged
• High and Low Pass Filters
• 0-15dB
• Aluminum Heatsink
• Dimensions: 17.6" W x 7.56" L x 2.32" H

EXCLUSIVE

Kicker 11ZX3504 + Amplifier Kit

350W 4-Channel Class A/B Car Amp + The Install Bay 8 Gauge Amp Kit + 1F Cap + Ring Terminals

11ZX3504_AK8 big DISCONTINUED
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Kicker 11ZX3504 + Amplifier Kit

350W 4-Channel Class A/B Car Amp + The Install Bay 8 Gauge Amp Kit + 1F Cap + Ring Terminals

ZX Series 4-Channel Class AB Car Amplifier • MOSFET Power Supply • Fail-Safe Integration Technology • Variable Low-Pass Filter • Variable High-Pass Filter • RX1200 Digital 1.2 Farad Capacitor • For Systems up to 1200 Watts • Complete 8 Gauge Amplifier Installation Kit with RCA Interconnect Cables

71

ZX Series 4-Channel Class AB Car Amplifier • MOSFET Power Supply • Fail-Safe Integration Technology • Variable Low-Pass Filter • Variable High-Pass Filter • RX1200 Digital 1.2 Farad Capacitor • For Systems up to 1200 Watts • Complete 8 Gauge Amplifier Installation Kit with RCA Interconnect Cables

NVX XAD42

3200W RMS X-Series Full-Bridge Class D 1-Ohm Stable 4-Channel Amplifier

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NVX XAD42

3200W RMS X-Series Full-Bridge Class D 1-Ohm Stable 4-Channel Amplifier

• 350 watts x 4 channel Watts RMS x 1 @ 4 ohm
• 400 watts x 4 channel Watts RMS x 1 @ 2 ohm
• 800 watts x 4 channel Watts RMS x 1 @ 1 ohm
• Total RMS Power: 3200 watts
• CEA-2006 Compliant

4

• 350 watts x 4 channel Watts RMS x 1 @ 4 ohm
• 400 watts x 4 channel Watts RMS x 1 @ 2 ohm
• 800 watts x 4 channel Watts RMS x 1 @ 1 ohm
• Total RMS Power: 3200 watts
• CEA-2006 Compliant

Boss R1004

400W Peak (75W RMS) Riot Series Class-AB 4-Channel Amplifier

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Boss R1004

400W Peak (75W RMS) Riot Series Class-AB 4-Channel Amplifier

• 38 watts x 4 channel @ 4 ohm
• 75 watts x 4 channel @ 2 ohm
• Total RMS Power: 75 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier

15

• 38 watts x 4 channel @ 4 ohm
• 75 watts x 4 channel @ 2 ohm
• Total RMS Power: 75 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier

DEI - Directed Audio D2205 R/B

5-Channel Hybrid Amplifier with ESP and Class D 5th Channel for Sub(s)

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DEI - Directed Audio D2205 R/B

5-Channel Hybrid Amplifier with ESP and Class D 5th Channel for Sub(s)

5 Channel hybrid Amplifier • 80Wx4 + 280Wx1 @ 4 Ohm RMS • ESP Port for Bitwriter • Adjustable Crossovers and Gain • 8dB Bass Boost • 600W RMS x 1 @ 1 Subwoofer Output • LED/Fan Output

5 Channel hybrid Amplifier • 80Wx4 + 280Wx1 @ 4 Ohm RMS • ESP Port for Bitwriter • Adjustable Crossovers and Gain • 8dB Bass Boost • 600W RMS x 1 @ 1 Subwoofer Output • LED/Fan Output

Hifonics ZRX616.4 OPEN BOX COMPLETE

600W 4 Channel Zeus Series Class AB Amplifier

ZRX616.4 big DISCONTINUED
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Hifonics ZRX616.4 OPEN BOX COMPLETE

600W 4 Channel Zeus Series Class AB Amplifier

Installed and used
• Max Power: 250W x 4 @ 4 ohm, 500W x 4 @ 2 ohm
• Total Peak Power: 2000W
• Variable Low and High Pass Filters
• Dimensions: 10" W x 12.6" L x 2.4" H

Installed and used
• Max Power: 250W x 4 @ 4 ohm, 500W x 4 @ 2 ohm
• Total Peak Power: 2000W
• Variable Low and High Pass Filters
• Dimensions: 10" W x 12.6" L x 2.4" H

EXCLUSIVE

Kicker Speakers + MTX Audio Amplifier Bundle

6-3/4" 11KS65 KS Series Speakers + MTX Audio RT604 4-Channel Amplifier + Kit + Sound Dampening

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Kicker Speakers + MTX Audio Amplifier Bundle

6-3/4" 11KS65 KS Series Speakers + MTX Audio RT604 4-Channel Amplifier + Kit + Sound Dampening

6-3/4" KS Series Car Speakers • 390W Max • 130W RMS • Road Thunder Series 4-Channel Class AB Car Amplifier • PWM MOSFET Power Supply • CEA-2006 Compliant Amplifier • Amplifier Kit • Sound Dampening Material

89

6-3/4" KS Series Car Speakers • 390W Max • 130W RMS • Road Thunder Series 4-Channel Class AB Car Amplifier • PWM MOSFET Power Supply • CEA-2006 Compliant Amplifier • Amplifier Kit • Sound Dampening Material

Hifonics XX-OLYMPUS R/B

1000W RMS Generation XX Series 4-Channel Amplifier

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Hifonics XX-OLYMPUS R/B

1000W RMS Generation XX Series 4-Channel Amplifier

Generation XX Series 4-Channel Ultra Class A/B Car Amplifier • 200W RMS x 4-Chan @ 2 ohm • 125W RMS x 4-Chan @ 4 Ohm • RCA Output • Bass Remote • Illuminated Hifonics Badge • Removable Endcaps

Generation XX Series 4-Channel Ultra Class A/B Car Amplifier • 200W RMS x 4-Chan @ 2 ohm • 125W RMS x 4-Chan @ 4 Ohm • RCA Output • Bass Remote • Illuminated Hifonics Badge • Removable Endcaps

Kicker CXA300.4 Amplifier (43CXA3004)

600 Watt Peak (300W RMS) CX Series 4-Channel Bridgeable Class-D Car Amplifier

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Kicker CXA300.4 Amplifier (43CXA3004)

600 Watt Peak (300W RMS) CX Series 4-Channel Bridgeable Class-D Car Amplifier

• 75 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 600 Watts
• Preamp RCA outputs to daisy chain multiple amps
• Variable Low/High-Pass Crossover: 50 - 200Hz 12dB/octave
• Variable Bass Boost: 0 to +12 dB bass boost at 40 Hz
• Dimensions: 7-3/16"W x 12-7/16"L x 2-3/8"H

• 75 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 600 Watts
• Preamp RCA outputs to daisy chain multiple amps
• Variable Low/High-Pass Crossover: 50 - 200Hz 12dB/octave
• Variable Bass Boost: 0 to +12 dB bass boost at 40 Hz
• Dimensions: 7-3/16"W x 12-7/16"L x 2-3/8"H

Kenwood eXcelon X600F (Open Box)

(Open Box) 1200W Max, 4-Channel Power Amplifier

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Kenwood eXcelon X600F (Open Box)

(Open Box) 1200W Max, 4-Channel Power Amplifier

Gouriki Series 4-Channel Class A/B Car Amplifier • 1200 Watts Max • 150 Watts x 4 Chan. @ 2 Ohm • 100 Watts x 4 Chan. @ 4 Ohm • K-STAT Self-Tracking Audio Transistor Technology • Cooling Fan And Multiple Vents •

Gouriki Series 4-Channel Class A/B Car Amplifier • 1200 Watts Max • 150 Watts x 4 Chan. @ 2 Ohm • 100 Watts x 4 Chan. @ 4 Ohm • K-STAT Self-Tracking Audio Transistor Technology • Cooling Fan And Multiple Vents •

Alpine PDX-F4 Open Box, Accepatble Condition (Used)

400W PDX Series 4-Channel Power Density Digital Class D Car Amplifier

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Alpine PDX-F4 Open Box, Accepatble Condition (Used)

400W PDX Series 4-Channel Power Density Digital Class D Car Amplifier

• Item Condition: Open Box
• RMS Power: 100W x 4-Chan. @ 4 ohm
• 400 Watts RMS
• Class D
• Variable High-Pass and Low-Pass Filter
• Blue LED Power/Status Indicator
• Compact Size

• Item Condition: Open Box
• RMS Power: 100W x 4-Chan. @ 4 ohm
• 400 Watts RMS
• Class D
• Variable High-Pass and Low-Pass Filter
• Blue LED Power/Status Indicator
• Compact Size

Alpine PDX-4.150 Defective #2

(Defective) 4-Channel Power Density Digital Amplifier (PDX4.150)

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Alpine PDX-4.150 Defective #2

(Defective) 4-Channel Power Density Digital Amplifier (PDX4.150)

Defective• 4-Channel Power Density Digital Amplifier • 150W x 4 chan. @ 4 Ohm • class D amp design • stackable installation design • MOSFET power supply • quick connect power connectors

Defective• 4-Channel Power Density Digital Amplifier • 150W x 4 chan. @ 4 Ohm • class D amp design • stackable installation design • MOSFET power supply • quick connect power connectors

Massive Audio BLX48

200w x 4 RMS @ 4ohm, 1600w Max, Full Range Full Range, 4-channel Amplifier

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Massive Audio BLX48

200w x 4 RMS @ 4ohm, 1600w Max, Full Range Full Range, 4-channel Amplifier

• 120 Watts RMS x 4 @ 4 ohm
• 240 Watts RMS x 2 @ 2 ohm
• 480 Watts RMS x 2 @ 4 ohm, Bridged
• Total Peak Power: 960 Watts
• CTA-2006 Compliant
• Bluetooth Capable with Separate Dongle
• Conformal Coating Protects Against Water, Dust, Heat
• 8.5" L x 4.25" W x 1.6" H

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• 120 Watts RMS x 4 @ 4 ohm
• 240 Watts RMS x 2 @ 2 ohm
• 480 Watts RMS x 2 @ 4 ohm, Bridged
• Total Peak Power: 960 Watts
• CTA-2006 Compliant
• Bluetooth Capable with Separate Dongle
• Conformal Coating Protects Against Water, Dust, Heat
• 8.5" L x 4.25" W x 1.6" H

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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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