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

Discontinued Class-D 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.
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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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MTX Audio SledgeHammer Bass Combo Package

TCE5512X2D + X500D + Metra AK4 -- 1200W Max Dual Loaded 12" SledgeHammer Vented Subwoofer Enclosure + Matched Class D Monoblock Amplifier + 4 Gauge Amp Install Kit

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MTX Audio SledgeHammer Bass Combo Package

TCE5512X2D + X500D + Metra AK4 -- 1200W Max Dual Loaded 12" SledgeHammer Vented Subwoofer Enclosure + Matched Class D Monoblock Amplifier + 4 Gauge Amp Install Kit

Side-firing, super slot port for maximum output • 3/4" MDF ensures rock-solid durability • 12" Thunder Series Subwoofer • 1200 watts max power handling • 600W RMS power handling • Carbon filled polypropylene cone • 2 ohm impedance

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Side-firing, super slot port for maximum output • 3/4" MDF ensures rock-solid durability • 12" Thunder Series Subwoofer • 1200 watts max power handling • 600W RMS power handling • Carbon filled polypropylene cone • 2 ohm impedance

Image Dynamics SQ1400.5

1,400W Peak (600W RMS) SQ Series Class-D 5-Channel 2-Ohm Stable Amplifier

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Image Dynamics SQ1400.5

1,400W Peak (600W RMS) SQ Series Class-D 5-Channel 2-Ohm Stable Amplifier

•4 ohm: 100 watts x 4 chan. + 300 watts x 1 chan.
•2 ohm: 200 watts x 4 chan. + 600 watts x 1 chan.
• Bridged, 4 ohm: 400 watts x 2 chan. + 600 watts x 1 chan.
• Total Peak Power: 1400 Watts
• Optically-Isolated MOSFET Power Supply
• 7.25" W x 13.3" L x 2" H

•4 ohm: 100 watts x 4 chan. + 300 watts x 1 chan.
•2 ohm: 200 watts x 4 chan. + 600 watts x 1 chan.
• Bridged, 4 ohm: 400 watts x 2 chan. + 600 watts x 1 chan.
• Total Peak Power: 1400 Watts
• Optically-Isolated MOSFET Power Supply
• 7.25" W x 13.3" L x 2" H

MTX Thunder 801D T801D

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MTX Thunder 801D T801D

• Description Coming Soon! •

• Description Coming Soon! •

Boss RT2500D Class D RIOT Series

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Boss RT2500D Class D RIOT Series

2500 watts, Class D MonoBlock RIOT Series amplifier • Bass Boost • Remote sub level control

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2500 watts, Class D MonoBlock RIOT Series amplifier • Bass Boost • Remote sub level control

JL Audio XD400/4

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

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JL Audio XD400/4

400W 4-Channel Class D XD Series Full-Range 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

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• 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

RetroSound QUAD4 Amplifier

180W RMS Quadraphonic Class-D 4-Channel Amplifier

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RetroSound QUAD4 Amplifier

180W RMS Quadraphonic Class-D 4-Channel Amplifier

• Quadraphonic Class-D 4-Channel Amplifier
• 45 watts RMS x 4
• Full range Class D digital circuitry
• Ultra-low current draw
• Advanced protection circuitry
• Built-in variable high pass/full range crossover

• Quadraphonic Class-D 4-Channel Amplifier
• 45 watts RMS x 4
• Full range Class D digital circuitry
• Ultra-low current draw
• Advanced protection circuitry
• Built-in variable high pass/full range crossover

Power Acoustik D1-4000D

4000W Monoblock Class D Demon Series Car Amplifier

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Power Acoustik D1-4000D

4000W Monoblock Class D Demon Series Car Amplifier

Demon Series Monoblock Class D Car Amplifier • 1200W RMS x 1 Chan. @ 4 Ohm • 1700W RMS x 1 Chan. @ 2 Ohm • 2200W RMS x 1 Chan. @ 1 Ohm • Wired Remote Included • Variable Bass Boost • Variable Subsonic Filter

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Demon Series Monoblock Class D Car Amplifier • 1200W RMS x 1 Chan. @ 4 Ohm • 1700W RMS x 1 Chan. @ 2 Ohm • 2200W RMS x 1 Chan. @ 1 Ohm • Wired Remote Included • Variable Bass Boost • Variable Subsonic Filter

RetroSound SUB-8100

100W RMS Single 8" Loaded Subwoofer Enclosure w/ Built-In Amplifier

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RetroSound SUB-8100

100W RMS Single 8" Loaded Subwoofer Enclosure w/ Built-In Amplifier

• 100W RMS Single 8" Sealed Subwoofer Enclosure with Built-In Amplifier
• 8" Subwoofer
• Built-In 100W Class D Amplifier
• Cast aluminum construction
• Enclosure Dimensions: 9-/1/4" W x 2-3/4" H

• 100W RMS Single 8" Sealed Subwoofer Enclosure with Built-In Amplifier
• 8" Subwoofer
• Built-In 100W Class D Amplifier
• Cast aluminum construction
• Enclosure Dimensions: 9-/1/4" W x 2-3/4" H

SoundStorm (SSL) EV4000D Open Box

4000W Max, Evolution Series Class D Monoblock Power Amplifier with Remote Level Control

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SoundStorm (SSL) EV4000D Open Box

4000W Max, Evolution Series Class D Monoblock Power Amplifier with Remote Level Control

Evolution Series Class D Car Amplifier • Single-Channel Monoblock • 4000W x 1 Chan. @ 1 Ohm • 3000W x 1 Chan. @ 2 Ohm • 1600W x 1 Chan. @ 4 Ohm • LED Protection Indicators • DataLink for Strapping Amps Together

Evolution Series Class D Car Amplifier • Single-Channel Monoblock • 4000W x 1 Chan. @ 1 Ohm • 3000W x 1 Chan. @ 2 Ohm • 1600W x 1 Chan. @ 4 Ohm • LED Protection Indicators • DataLink for Strapping Amps Together

Pioneer Premier PRS-D4000F

Premier PRS ICE 4-Channel Class D ICEpower Technology Amplifier

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Pioneer Premier PRS-D4000F

Premier PRS ICE 4-Channel Class D ICEpower Technology Amplifier

1200 watt Max, Bridgeable 4-Channel Class FD (Full-Range Class D) Amplifier • 75 watts x 4 chan. @ 4 ohm RMS • 300 watts x 2 chan. @ 4 ohm Bridged RMS • CEA-2006 Compliant • Energy Saving Design • Compact Chassis • High Pass and Low Pass Variable Crossover

1200 watt Max, Bridgeable 4-Channel Class FD (Full-Range Class D) Amplifier • 75 watts x 4 chan. @ 4 ohm RMS • 300 watts x 2 chan. @ 4 ohm Bridged RMS • CEA-2006 Compliant • Energy Saving Design • Compact Chassis • High Pass and Low Pass Variable Crossover

EXCLUSIVE

Infinity Subs + Kicker Amp Upgrade Bundle

860W 250W 8" Reference Series Subwoofer + KX400.1 400W RMS KX Series Monoblock Amplifier + XKIT42 2-Chan. 4 Gauge OFC Amp Installation Kit

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Infinity Subs + Kicker Amp Upgrade Bundle

860W 250W 8" Reference Series Subwoofer + KX400.1 400W RMS KX Series Monoblock Amplifier + XKIT42 2-Chan. 4 Gauge OFC Amp Installation Kit

• Subwoofer: 250W RMS
• Amplifier: RMS: 200W x 1 @ 4 ohm, 400W x 1 @ 2 ohm
• CEA-2006 Compliant
• 4 Gauge 2-Channel X-Series Complete Amplifier Installation Kit

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• Subwoofer: 250W RMS
• Amplifier: RMS: 200W x 1 @ 4 ohm, 400W x 1 @ 2 ohm
• CEA-2006 Compliant
• 4 Gauge 2-Channel X-Series Complete Amplifier Installation Kit

Refurbished Rockford Fosgate LS-T2500-1bdCP-RB

Refurbished 2500W RMS Constant Power Series Class D Monoblock Amplifier

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Refurbished Rockford Fosgate LS-T2500-1bdCP-RB

Refurbished 2500W RMS Constant Power Series Class D Monoblock Amplifier

• RMS: 1500W x 1 @ 4 ohm, 2500W x 1 @ 2 ohm, 2500W x 1 @ 1 ohm
• Total RMS Power: 2500W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB at 45 Hz
• Ultra Efficient Class bD Circuitry
• Dimensions: 21-7/8"L x 8-3/16"W x 2-3/16"H

• RMS: 1500W x 1 @ 4 ohm, 2500W x 1 @ 2 ohm, 2500W x 1 @ 1 ohm
• Total RMS Power: 2500W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB at 45 Hz
• Ultra Efficient Class bD Circuitry
• Dimensions: 21-7/8"L x 8-3/16"W x 2-3/16"H

Audiobahn A18001DT

3600W Max, Class D MonoBlock Amplifier

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Audiobahn A18001DT

3600W Max, Class D MonoBlock Amplifier

Class D Monoblock Amplifier • 3600W Max • 1800W RMS @ 1 ohm • Blue Digital Volt Meter Display • Dual Cooling Fans • 4-way protection circuitry • Variable Low-Pass Crossover: 50-150Hz • Cobalt blue illumination (with on/off selector)

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Class D Monoblock Amplifier • 3600W Max • 1800W RMS @ 1 ohm • Blue Digital Volt Meter Display • Dual Cooling Fans • 4-way protection circuitry • Variable Low-Pass Crossover: 50-150Hz • Cobalt blue illumination (with on/off selector)

Kicker KX2400.1 Amp + (2) NVX VCW122 Subs

Matched Combo Featuring 2400W RMS Mono Amp + 2 Powerful SPL/SQ Subs

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Kicker KX2400.1 Amp + (2) NVX VCW122 Subs

Matched Combo Featuring 2400W RMS Mono Amp + 2 Powerful SPL/SQ Subs

• Package Includes 2 x NVX VC Subs and a Matching Kicker Amp
• RMS: 1200W x 1 @ 4 ohm, 2400W x 1 @ 2 ohm
• Total Peak Power: 3200W
• CEA-2006 Compliant
• Kick EQ+ Bass Boost: 0-18 dB from 20-80 Hz
• Magnetic Panel Covers Controls
• Dimensions: 8-5/16"W x 15-1/2"L x 2-1/8"H

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• Package Includes 2 x NVX VC Subs and a Matching Kicker Amp
• RMS: 1200W x 1 @ 4 ohm, 2400W x 1 @ 2 ohm
• Total Peak Power: 3200W
• CEA-2006 Compliant
• Kick EQ+ Bass Boost: 0-18 dB from 20-80 Hz
• Magnetic Panel Covers Controls
• Dimensions: 8-5/16"W x 15-1/2"L x 2-1/8"H

Hifonics Brutus BRX3016.1D 3000W RMS Amp + 0 Gauge Amp Kit + 1 Farad Capacitor

Brutus Series Subwoofer Amplifier + Amp Wire Kit and Capacitor Package

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Hifonics Brutus BRX3016.1D 3000W RMS Amp + 0 Gauge Amp Kit + 1 Farad Capacitor

Brutus Series Subwoofer Amplifier + Amp Wire Kit and Capacitor Package

• 1000 Watts RMS x 1 @ 4 ohm
• 2000 Watts RMS x 1 @ 2 ohm
• 3000 Watts RMS x 1 @ 1 ohm
• Wired remote bass level control included
• Mono channel operation, 1-Ohm Stable
• 3-way system protection circuitry (thermal, overload and speaker short protection)
• Variable Bass Boost (0 to +10 dB bass boost at 45 Hz)

• 1000 Watts RMS x 1 @ 4 ohm
• 2000 Watts RMS x 1 @ 2 ohm
• 3000 Watts RMS x 1 @ 1 ohm
• Wired remote bass level control included
• Mono channel operation, 1-Ohm Stable
• 3-way system protection circuitry (thermal, overload and speaker short protection)
• Variable Bass Boost (0 to +10 dB bass boost at 45 Hz)

EXCLUSIVE

Complete RE Audio DTS-1500.1 + SHURiKEN SK-BT80 Package

RE Audio DTS-1500.1 Amp + SHURiKEN SK-BT80 Batterry + Amp Kit + Isolator + Fuse Holder + Fuses

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Complete RE Audio DTS-1500.1 + SHURiKEN SK-BT80 Package

RE Audio DTS-1500.1 Amp + SHURiKEN SK-BT80 Batterry + Amp Kit + Isolator + Fuse Holder + Fuses

DTS Series Monoblock Class D Car Amplifier • Pulse Width Modulated MOSFET power supply • High Performance Battery from Shuriken • 80 Amp Hours • 1900 Crank Amps • 200 amp Battery Isolator and Relay • Extends battery life

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DTS Series Monoblock Class D Car Amplifier • Pulse Width Modulated MOSFET power supply • High Performance Battery from Shuriken • 80 Amp Hours • 1900 Crank Amps • 200 amp Battery Isolator and Relay • Extends battery life

EXCLUSIVE

JL Audio XDv2 Series Amplifier + FREE NVX Audio 10" VC-Series Subwoofer

JL Audio XD600/1v2 600W XDv2 Series Monoblock Class D Subwoofer Amplifier + NVX VCW104 750W 10" VC-Series Dual 4-ohm Car Subwoofer

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JL Audio XDv2 Series Amplifier + FREE NVX Audio 10" VC-Series Subwoofer

JL Audio XD600/1v2 600W XDv2 Series Monoblock Class D Subwoofer Amplifier + NVX VCW104 750W 10" VC-Series Dual 4-ohm Car Subwoofer

• 600 W x 1 @ 2 ohm
• Pressed Paper Cone With Woven Fiber Top
• Dual 4-ohm Voice Coil
• High Excursion Foam Surround
• NexD™ Switching Technology
• Dual-Range Differential Balanced Input Section
• Advanced Rollback Protection
• Selectable Low-Pass Filter Slope: 12 dB or 24 dB
• Detented, Calibrated Filter Freq. Potentiometer

• 600 W x 1 @ 2 ohm
• Pressed Paper Cone With Woven Fiber Top
• Dual 4-ohm Voice Coil
• High Excursion Foam Surround
• NexD™ Switching Technology
• Dual-Range Differential Balanced Input Section
• Advanced Rollback Protection
• Selectable Low-Pass Filter Slope: 12 dB or 24 dB
• Detented, Calibrated Filter Freq. Potentiometer

Xtant XTANT6.1

Xtant Series Class D Monoblock Amplifier

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Xtant XTANT6.1

Xtant Series Class D Monoblock Amplifier

Xtant Series Class D Monoblock Car Amplifier • 300W x 1 chan. @ 4 ohm • 600W x 1 chan. @ 2 ohm • Fully regulated PWM MOSFET power supply • Preamp RCA outputs • Thermal and overcurrent protection circuitry

Xtant Series Class D Monoblock Car Amplifier • 300W x 1 chan. @ 4 ohm • 600W x 1 chan. @ 2 ohm • Fully regulated PWM MOSFET power supply • Preamp RCA outputs • Thermal and overcurrent protection circuitry

Boss CW2500D R/B

Refurbished 2500W Max Chaos Wired Series Class D Monoblock Power Amplifier

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Boss CW2500D R/B

Refurbished 2500W Max Chaos Wired Series Class D Monoblock Power Amplifier

Chaos Series Monoblock Class D Car Amplifier • 750W x 1 chan. @ 4 Ohm • 1800W x 1 chan. @ 2 Ohm • 2500 MAX • Soft Start Turn-On • 3-Way System Protection Circuitry • DataLink Circuitry • Matte Black Aluminum Alloy Heatsink

Chaos Series Monoblock Class D Car Amplifier • 750W x 1 chan. @ 4 Ohm • 1800W x 1 chan. @ 2 Ohm • 2500 MAX • Soft Start Turn-On • 3-Way System Protection Circuitry • DataLink Circuitry • Matte Black Aluminum Alloy Heatsink

** CLOSEOUT!! ** Eclipse XA4000

4-Channel Class D ICEpower Technology Amplifier

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** CLOSEOUT!! ** Eclipse XA4000

4-Channel Class D ICEpower Technology Amplifier

840 watts peak • 125W RMS x 4 chan. @ 4 ohm • 175W RMS x 4 chan. @ 2 ohm • High current, high efficiency FET power supply • "Easy Tune" top-mounted controls

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840 watts peak • 125W RMS x 4 chan. @ 4 ohm • 175W RMS x 4 chan. @ 2 ohm • High current, high efficiency FET power supply • "Easy Tune" top-mounted controls

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    FAQ Frequently asked questions in Discontinued Class-D Amplifiers

    Class D Amplifiers Frequently Asked Questions (FAQ)
    Class D amplifiers are a type of switching amplifier known for their high efficiency and compact size. Unlike traditional Class A, B, and AB amplifiers that use continuous analog voltage to amplify audio signals, Class D amplifiers employ a digital switching technique. This process rapidly switches the output transistors on and off, effectively turning them into binary switches that deliver the audio signal to the speaker. The switching nature of Class D amplifiers drastically reduces power wastage, resulting in higher efficiency and less heat production. As a result, Class D amplifiers are ideal for applications with limited space or power constraints, making them popular in car audio, home theater systems, and portable devices.
    Yes, modern Class D amplifiers have made significant advancements in audio fidelity and can deliver high-quality sound performance. While traditional audiophiles may have associated Class D with lower audio quality due to early models' limitations, today's Class D amplifiers have overcome many of these challenges. With advancements in switching technology, filtering, and feedback mechanisms, Class D amplifiers can now offer exceptional audio reproduction that rivals traditional Class AB amplifiers. Additionally, Class D amplifiers' efficiency and lower heat generation make them well-suited for high-power audio applications where traditional amplifiers would be impractical.
    Yes, Class D amplifiers are versatile and can power various speaker types, including subwoofers, woofers, mid-range, and tweeters. When selecting a Class D amplifier for your speakers, consider the power output (wattage) and impedance rating. Ensure that the amplifier's power rating matches or slightly exceeds your speakers' power handling capabilities to prevent underpowering or overpowering, which can lead to distortion or speaker damage. Additionally, check the amplifier's impedance range to ensure compatibility with your speakers' impedance. Most Class D amplifiers can handle both 4-ohm and 2-ohm loads, making them suitable for a wide range of speaker configurations.
    No, Class D amplifiers are known for their high efficiency, which results in significantly less heat generation compared to other amplifier classes like Class A or Class AB. The digital switching technique used in Class D amplifiers reduces power loss, resulting in a more efficient conversion of electrical energy into audio output. As a result, Class D amplifiers remain relatively cool even at high volume levels, making them suitable for space-constrained installations and applications where heat dissipation is a concern. Their cool operation also extends the lifespan of internal components and reduces the need for large heat sinks or fans.
    Yes, many Class D amplifiers support bridge mode, allowing you to increase the power output when driving a single speaker or subwoofer. In bridge mode, the amplifier combines the power output from two channels into a single channel, effectively doubling the power delivered to the speaker. However, it's essential to follow the manufacturer's guidelines and ensure that your amplifier supports bridging. Additionally, pay attention to the speaker's impedance requirements, as bridging may change the amplifier's impedance capabilities. If you're unsure or need assistance with bridging your Class D amplifier, contact Sonic Electronix's knowledgeable staff, who can help you find the right amplifier and configuration for your audio setup. With their compact size, high efficiency, and versatility, Class D amplifiers offer a compelling solution for various audio applications, delivering powerful and clear sound performance with minimal heat output.
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