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  3. Discontinued JL Audio Car Audio & Electronics
  4. Discontinued JL Audio Car Amplifiers
  5. Discontinued JL Audio 4-Channel Amplifiers

Discontinued JL Audio 4-Channel Amplifiers

Versatile and robust, JL Audio's 4-channel amplifiers enhance your audio system.

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Product Type
Price Range
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.
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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JL Audio XD400/4 Open Box

400W, 4-Channel Class D XD Series Full-Range Car Amplifier

XD400/4 big DISCONTINUED
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JL Audio XD400/4 Open Box

400W, 4-Channel Class D XD Series Full-Range Car Amplifier

XD Series 4-Channel Class D Car Amplifier • 100W x 4-Chan @ 2 Ohm • NexD Ultra-High Speed Topology • Preamp RCA Outputs • Variable High/Low-Pass Filter • 3-Way System Protection Circuitry • Remote Bass Input

XD Series 4-Channel Class D Car Amplifier • 100W x 4-Chan @ 2 Ohm • NexD Ultra-High Speed Topology • Preamp RCA Outputs • Variable High/Low-Pass Filter • 3-Way System Protection Circuitry • Remote Bass Input

JL Audio XDM400/4 (Open Box, Like New)

400W RMS Class D XDM Series 4 Channel Car and Marine Amplifier

XDM400/4 big DISCONTINUED
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JL Audio XDM400/4 (Open Box, Like New)

400W RMS Class D XDM Series 4 Channel Car and Marine 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 D 2 ohm Stable 4-Channel 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 D 2 ohm Stable 4-Channel Amplifier

JL Audio HD600/4 Open Box

4-Channel Class D, HD Series Small Profile Car Amplifier with R.I.P.S. Technology

HD600/4 big DISCONTINUED
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JL Audio HD600/4 Open Box

4-Channel Class D, HD Series Small Profile Car Amplifier with R.I.P.S. Technology

JL Audio HD Series 4-Channel Class D, Small Profile Car Amplifier with R.I.P.S. Technology • 150 watts x 4 chan. @ 1.5-4 ohm • 300 watts x 2 chan. @ 3-8 ohm • Single Cycle Control™ • Preamp RCA outputs • Speaker-level inputs

JL Audio HD Series 4-Channel Class D, Small Profile Car Amplifier with R.I.P.S. Technology • 150 watts x 4 chan. @ 1.5-4 ohm • 300 watts x 2 chan. @ 3-8 ohm • Single Cycle Control™ • Preamp RCA outputs • Speaker-level inputs

JL Audio RD400/4 (Open Box, Good)

400W RMS Class D RD Series 4 Channel Car Amplifier

RD400/4 big DISCONTINUED
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JL Audio RD400/4 (Open Box, Good)

400W RMS Class D RD 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 D 2 ohm Stable 4-Channel Amplifier

16

• 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 D 2 ohm Stable 4-Channel Amplifier

JL Audio RD400/4 (Like New (Open Box))

400W RMS RD Series Class-D 4-Channel Amplifier

RD400/4 big DISCONTINUED
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JL Audio RD400/4 (Like New (Open Box))

400W RMS RD Series Class-D 4-Channel 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 D 2 ohm Stable 4-Channel-Channel Amplifier

16

• 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 D 2 ohm Stable 4-Channel-Channel Amplifier

JL Audio XD400/4v2 (Open Box, Great)

400W RMS XDv2 Series Class-D 4-Channel Amplifier

XD400/4V2 big DISCONTINUED
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JL Audio XD400/4v2 (Open Box, Great)

400W RMS XDv2 Series Class-D 4-Channel 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 D 2 ohm Stable 4-Channel Amplifier

14

• 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 D 2 ohm Stable 4-Channel Amplifier

JL Audio JD400/4 (Open Box, Great)

400W RMS Class D JD Series 4 Channel Car Amplifier

JD400/4 big DISCONTINUED
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JL Audio JD400/4 (Open Box, Great)

400W RMS Class D JD 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 D 2 ohm Stable 4-Channel 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 D 2 ohm Stable 4-Channel Amplifier

JL Audio JD400/4 (Like New (Open Box))

400W RMS Class D JD Series 4 Channel Car Amplifier

JD400/4 big DISCONTINUED
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JL Audio JD400/4 (Like New (Open Box))

400W RMS Class D JD 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 D 2 ohm Stable 4-Channel 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 D 2 ohm Stable 4-Channel Amplifier

JL Audio JD400/4 OPEN BOX

4-Channel Full Range Class D Amplifier

JD400/4 big DISCONTINUED
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JL Audio JD400/4 OPEN BOX

4-Channel Full Range Class D Amplifier

• 4-Channel Class D
• NexD Switching Technology
• Compact and Powerful
• Copmlete Signal Processing Sections

• 4-Channel Class D
• NexD Switching Technology
• Compact and Powerful
• Copmlete Signal Processing Sections

JL Audio M400/4 R/B

400W Marine, M Series 4-Channel Class D Full-Range Amplifier

M400/4 big DISCONTINUED
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JL Audio M400/4 R/B

400W Marine, M Series 4-Channel Class D Full-Range Amplifier

• 400W RMS
• Preamp RCA outputs
• 3-Way System Protection Circuitry
• Variable High/Low-Pass Filter
• Remote Bass Level Input
• Total Amplifier Efficiencies Exceed 80%

• 400W RMS
• Preamp RCA outputs
• 3-Way System Protection Circuitry
• Variable High/Low-Pass Filter
• Remote Bass Level Input
• Total Amplifier Efficiencies Exceed 80%

JL Audio HX280/4 Open Box Complete (Very Good, Used)

280W 4-Ch Class D Full-Range Ultra-Compact Amplifier for Powersport Vehicles

HX280/4 big DISCONTINUED
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JL Audio HX280/4 Open Box Complete (Very Good, Used)

280W 4-Ch Class D Full-Range Ultra-Compact Amplifier for Powersport Vehicles

• Item Condition: Open Box
• 50W x 4 @ 4ohm , 70W x 4 @ 2ohm
• NexD™ ultra-high-speed switching design
• Black powder-coated finish
• Gasketed cover for the controls
• Stainless steel hardware for durability
• Accepts RCA (low-level) & Speaker-level (high-level) signal
• Signal to Noise Ration: 89.5 dB

• Item Condition: Open Box
• 50W x 4 @ 4ohm , 70W x 4 @ 2ohm
• NexD™ ultra-high-speed switching design
• Black powder-coated finish
• Gasketed cover for the controls
• Stainless steel hardware for durability
• Accepts RCA (low-level) & Speaker-level (high-level) signal
• Signal to Noise Ration: 89.5 dB

JL Audio MHD6004 (Open Box, Complete)

600W 4-Channel Class D, MHD Series Small Profile Marine Amplifier with R.I.P.S. Technology

MHD600/4 big DISCONTINUED
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JL Audio MHD6004 (Open Box, Complete)

600W 4-Channel Class D, MHD Series Small Profile Marine Amplifier with R.I.P.S. Technology

4-Channel Class D MHD Series Marine Amplifier • 150W x 4 Chan. @ 4 ohm • 300W x 2 Chan. Bridged @ 8 ohm • Regulated Intelligent Power Supply • Single Cycle Control Technology • Studio-Grade Signal Processing • Advanced Rollback Protection Circuitry

4-Channel Class D MHD Series Marine Amplifier • 150W x 4 Chan. @ 4 ohm • 300W x 2 Chan. Bridged @ 8 ohm • Regulated Intelligent Power Supply • Single Cycle Control Technology • Studio-Grade Signal Processing • Advanced Rollback Protection Circuitry

JL Audio Slash 300/4v3 Amplifier + Free High Quality NVX Amp Kit

300W RMS 4-Channel Slash v3 Series Class A/B Full-Range Amplifier

300/4v3, XKIT44 big DISCONTINUED
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JL Audio Slash 300/4v3 Amplifier + Free High Quality NVX Amp Kit

300W RMS 4-Channel Slash v3 Series Class A/B Full-Range Amplifier

• RMS: 75W x 1 @ 4 ohm, 75W x 1 @ 2 ohm, 75W x 1 @ 1.5 ohm
• Total RMS Power: 300W
• R.I.P.S. (Regulated, Intelligent Power Supply)
• Dual N-Channel MOSFET power supply
• Absolute Symmetry™ Class A/B Circuit
• 13.4"L x 9.25"W x 2.36"H

102

• RMS: 75W x 1 @ 4 ohm, 75W x 1 @ 2 ohm, 75W x 1 @ 1.5 ohm
• Total RMS Power: 300W
• R.I.P.S. (Regulated, Intelligent Power Supply)
• Dual N-Channel MOSFET power supply
• Absolute Symmetry™ Class A/B Circuit
• 13.4"L x 9.25"W x 2.36"H

JL Audio HX280/4 (Open Box)

280W 4-Ch Class D Full-Range Ultra-Compact Amplifier for Powersport Vehicles / SSVs / UTVs / Motorcycles / Muscle Cars / HotRods / Cars

HX280/4 big DISCONTINUED
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JL Audio HX280/4 (Open Box)

280W 4-Ch Class D Full-Range Ultra-Compact Amplifier for Powersport Vehicles / SSVs / UTVs / Motorcycles / Muscle Cars / HotRods / Cars

• 50W x 4 @ 4ohm , 70W x 4 @ 2ohm
• NexD™ ultra-high-speed switching design
• Black powder-coated finish
• Gasketed cover for the controls
• Stainless steel hardware for durability
• Accepts RCA (low-level) & Speaker-level (high-level) signal
• Signal to Noise Ration: 89.5 dB

2

• 50W x 4 @ 4ohm , 70W x 4 @ 2ohm
• NexD™ ultra-high-speed switching design
• Black powder-coated finish
• Gasketed cover for the controls
• Stainless steel hardware for durability
• Accepts RCA (low-level) & Speaker-level (high-level) signal
• Signal to Noise Ration: 89.5 dB

JL Audio Slash 300/4v3 Amplifier + Free $100 Gift Card

300W RMS 4-Channel Slash v3 Series Class A/B Full-Range Amplifier

300/4v3, 100EGIFT big DISCONTINUED
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JL Audio Slash 300/4v3 Amplifier + Free $100 Gift Card

300W RMS 4-Channel Slash v3 Series Class A/B Full-Range Amplifier

• RMS: 75W x 1 @ 4 ohm, 75W x 1 @ 2 ohm, 75W x 1 @ 1.5 ohm
• Total RMS Power: 300W
• R.I.P.S. (Regulated, Intelligent Power Supply)
• Dual N-Channel MOSFET power supply
• Absolute Symmetry™ Class A/B Circuit
• 13.4"L x 9.25"W x 2.36"H

26

• RMS: 75W x 1 @ 4 ohm, 75W x 1 @ 2 ohm, 75W x 1 @ 1.5 ohm
• Total RMS Power: 300W
• R.I.P.S. (Regulated, Intelligent Power Supply)
• Dual N-Channel MOSFET power supply
• Absolute Symmetry™ Class A/B Circuit
• 13.4"L x 9.25"W x 2.36"H

JL Audio Slash 300/4v3 (Open Box)

300W RMS 4-Channel Slash v3 Series Class A/B Full-Range Amplifier

300/4v3 big DISCONTINUED
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JL Audio Slash 300/4v3 (Open Box)

300W RMS 4-Channel Slash v3 Series Class A/B Full-Range Amplifier

• RMS: 75W x 1 @ 4 ohm, 75W x 1 @ 2 ohm, 75W x 1 @ 1.5 ohm
• Total RMS Power: 300W
• R.I.P.S. (Regulated, Intelligent Power Supply)
• Dual N-Channel MOSFET power supply
• Absolute Symmetry™ Class A/B Circuit
• 13.4"L x 9.25"W x 2.36"H

21

• RMS: 75W x 1 @ 4 ohm, 75W x 1 @ 2 ohm, 75W x 1 @ 1.5 ohm
• Total RMS Power: 300W
• R.I.P.S. (Regulated, Intelligent Power Supply)
• Dual N-Channel MOSFET power supply
• Absolute Symmetry™ Class A/B Circuit
• 13.4"L x 9.25"W x 2.36"H

JL Audio Slash 300/4v3 + NVX XFLOC4 Line-Output-Converter + Amp Kit

300W RMS 4-Channel Amplifier + NVX 4-Channel L.O.C. + 4 Gauge Amp Kit

300/4v3, XFLOC4, BAK44 big DISCONTINUED
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JL Audio Slash 300/4v3 + NVX XFLOC4 Line-Output-Converter + Amp Kit

300W RMS 4-Channel Amplifier + NVX 4-Channel L.O.C. + 4 Gauge Amp Kit

• RMS: 75W x 1 @ 4 ohm, 75W x 1 @ 2 ohm, 75W x 1 @ 1.5 ohm
• Total RMS Power: 300W
• R.I.P.S. (Regulated, Intelligent Power Supply)
• Dual N-Channel MOSFET power supply
• Absolute Symmetry™ Class A/B Circuit
• 13.4"L x 9.25"W x 2.36"H

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VIP Product Get $73.20 in rewards to spend later

113

• RMS: 75W x 1 @ 4 ohm, 75W x 1 @ 2 ohm, 75W x 1 @ 1.5 ohm
• Total RMS Power: 300W
• R.I.P.S. (Regulated, Intelligent Power Supply)
• Dual N-Channel MOSFET power supply
• Absolute Symmetry™ Class A/B Circuit
• 13.4"L x 9.25"W x 2.36"H

JL Audio MHD600/4 + Free $150 Gift Card

600W 4-Channel Class D, MHD Series Small Profile Marine Amplifier with R.I.P.S. Technology

MHD600/4, 150EGIFT big DISCONTINUED
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JL Audio MHD600/4 + Free $150 Gift Card

600W 4-Channel Class D, MHD Series Small Profile Marine Amplifier with R.I.P.S. Technology

4-Channel Class D MHD Series Marine Amplifier • 150W x 4 Chan. @ 4 ohm • 300W x 2 Chan. Bridged @ 8 ohm • Regulated Intelligent Power Supply • Single Cycle Control Technology • Studio-Grade Signal Processing • Advanced Rollback Protection Circuitry

5

4-Channel Class D MHD Series Marine Amplifier • 150W x 4 Chan. @ 4 ohm • 300W x 2 Chan. Bridged @ 8 ohm • Regulated Intelligent Power Supply • Single Cycle Control Technology • Studio-Grade Signal Processing • Advanced Rollback Protection Circuitry

JL Audio JD400/4 - New (Damaged Packaging, Product A+)

400W RMS Class D JD Series 4 Channel Car Amplifier

JD400/4 big DISCONTINUED
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JL Audio JD400/4 - New (Damaged Packaging, Product A+)

400W RMS Class D JD 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 D 2 ohm Stable 4-Channel-Channel Amplifier

34

• 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 D 2 ohm Stable 4-Channel-Channel Amplifier

JL Audio JD400/4 (Open Box, Like New)

400W RMS Class D JD Series 4 Channel Car Amplifier

JD400/4 big DISCONTINUED
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JL Audio JD400/4 (Open Box, Like New)

400W RMS Class D JD 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 D 2 ohm Stable 4-Channel Amplifier

34

• 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 D 2 ohm Stable 4-Channel Amplifier

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    JL Audio 4-Channel Amplifiers Information

    A 4 channel car amplifier from JL Audio will provide your vehicle with the power it requires. These amps can operate four channels and JL Audio is a leader in amplification solutions. Power your speakers with a JL Audio 4-channel amplifier for a great all around sound.
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    • Owner's manual
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    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
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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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