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JL Audio MX10IB3-SG-CLD-B (Open Box Complete)

10-inch (250 mm) 4 ohm Marine Subwoofer Driver

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10-inch (250 mm) 4 ohm Marine Subwoofer Driver

• 175W RMS
• Injection-Molded mica-filled polypropylene cone bodies
• Synthetic rubber surround specifically formulated with UV inhibitors
• Marine grade progressive roll synthetic fiber spider
• Gold-Plated marine-grade brass connection terminals
• Long linear excursion for enhanced output and reduced distortion

• 175W RMS
• Injection-Molded mica-filled polypropylene cone bodies
• Synthetic rubber surround specifically formulated with UV inhibitors
• Marine grade progressive roll synthetic fiber spider
• Gold-Plated marine-grade brass connection terminals
• Long linear excursion for enhanced output and reduced distortion

Kole Audio TRAX1-5500D (TRAX 1-5500D) R/B

5500W Max, TRAX Series Class D Digital Monoblock Amplifier

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5500W Max, TRAX Series Class D Digital Monoblock Amplifier

TRAX Series Class D Digital Monoblock Amplifier • 1700W x 1 chan. @ 1 ohm • 2500W x 1 chan. @ 2 ohm • • 3200W x 1 chan. @ 4 ohm • 5500W Max • PWM Power Supply • Midnight Blue Finish • Three-Way Protection •

TRAX Series Class D Digital Monoblock Amplifier • 1700W x 1 chan. @ 1 ohm • 2500W x 1 chan. @ 2 ohm • • 3200W x 1 chan. @ 4 ohm • 5500W Max • PWM Power Supply • Midnight Blue Finish • Three-Way Protection •

MTX Thunder Elite 601D (TE601D) Open Box

(Open Box) 1200W Max, Class D Monoblock Thunder Elite Amplifier

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(Open Box) 1200W Max, Class D Monoblock Thunder Elite Amplifier

Thunder Elite Series 1-Channel Class D Car Amplifier • 300W x 1 chan. @ 4 ohm • 600W x 1 chan. @ 2 ohm • 1200W Max • Semi Unregulated MOSFET • Fan-cooled system • Overload and thermal protection

Thunder Elite Series 1-Channel Class D Car Amplifier • 300W x 1 chan. @ 4 ohm • 600W x 1 chan. @ 2 ohm • 1200W Max • Semi Unregulated MOSFET • Fan-cooled system • Overload and thermal protection

Belva BB5000D-open box complete

3000W RMS Class D Monoblock BB Series Car Amplifier

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3000W RMS Class D Monoblock BB Series Car Amplifier

• RMS: 1200W x 1 @ 4 ohm, 1800W x 1 @ 2 ohm, 3000W x 1 @ 1 ohm
• Total Peak Power: 5000W
• 1 Pair of Preamp Outputs
• Bass Boost 0-12 dB from 30-80 Hz
• Subsonic Filter from 20-50 Hz
• Dimensions: 20-3/8"W x 8-1/4"D x 2-1/4"H

• RMS: 1200W x 1 @ 4 ohm, 1800W x 1 @ 2 ohm, 3000W x 1 @ 1 ohm
• Total Peak Power: 5000W
• 1 Pair of Preamp Outputs
• Bass Boost 0-12 dB from 30-80 Hz
• Subsonic Filter from 20-50 Hz
• Dimensions: 20-3/8"W x 8-1/4"D x 2-1/4"H

Boss NXD4500-OPEN BOX

4500W Max Onyx Series Class D Monoblock Power Amplifier

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4500W Max Onyx Series Class D Monoblock Power Amplifier

• RMS: 2100W x 1 @ 4 ohm
• Peak: 3500W x 1 @ 2 ohm, 4500W x 1 chan @ 1 ohm
• Class D Circuitry
• Bass Boost 0-18 dB
• Line and Speaker Level Inputs
• Dimensions: 15-1/4" L x 10" W x 2-3/16" H

• RMS: 2100W x 1 @ 4 ohm
• Peak: 3500W x 1 @ 2 ohm, 4500W x 1 chan @ 1 ohm
• Class D Circuitry
• Bass Boost 0-18 dB
• Line and Speaker Level Inputs
• Dimensions: 15-1/4" L x 10" W x 2-3/16" H

Hifonics Atlas (Factory Refurbished)

3000W RMS 1-Channel Monoblock Mt. Olympus Series Class D Amplifier

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3000W RMS 1-Channel Monoblock Mt. Olympus Series Class D Amplifier

• RMS: 1200W x 1 @ 4 ohm, 2100W x 1 @ 2 ohm, 3000W x 1 @ 1 ohm
• Total RMS Power: 3000W
• Class D Circuitry
• Bass Boost: 0-10 dB
• 1 Pair of Preamp Outputs
• Dimensions: 9"W x 21-3/4"L x 2-3/4"H

• RMS: 1200W x 1 @ 4 ohm, 2100W x 1 @ 2 ohm, 3000W x 1 @ 1 ohm
• Total RMS Power: 3000W
• Class D Circuitry
• Bass Boost: 0-10 dB
• 1 Pair of Preamp Outputs
• Dimensions: 9"W x 21-3/4"L x 2-3/4"H

MTX RFL300D R/B

Refurbished 600W Max, RFL Series Class D Monoblock Amplifier

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Refurbished 600W Max, RFL Series Class D Monoblock Amplifier

RFL Series Monoblock Class D Car Amplifier • 600W Max • 300W x 1 Chan. @ 2 Ohm • Dual Speaker Terminals • Variable Low-Pass Filter • Subsonic Filter • CEA-2006 Compliant • Bass Boost

RFL Series Monoblock Class D Car Amplifier • 600W Max • 300W x 1 Chan. @ 2 Ohm • Dual Speaker Terminals • Variable Low-Pass Filter • Subsonic Filter • CEA-2006 Compliant • Bass Boost

Hifonics BRX1000.1D-RB (Factory Refurbished)

1000W Brutus Series Monoblock Class D Car Amplifier

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1000W Brutus Series Monoblock Class D Car Amplifier

• RMS: 400W x 1 @ 4 ohm, 700W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total Peak Power: 1000W
• CEA-2006 Compliant
• Ultra-Fi™ Pulse Width Modulated MOSFET Power Supply
• Heavy Duty Aluminum Alloy Heat-Sink
• Dimensions: 10.31"W x 14.35"L x 2.52"H

• RMS: 400W x 1 @ 4 ohm, 700W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total Peak Power: 1000W
• CEA-2006 Compliant
• Ultra-Fi™ Pulse Width Modulated MOSFET Power Supply
• Heavy Duty Aluminum Alloy Heat-Sink
• Dimensions: 10.31"W x 14.35"L x 2.52"H

Kenwood KAC-8104D Open Box

1000W Max, Class D Monoblock Amplifier

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1000W Max, Class D Monoblock Amplifier

Class D Monoblock Car Amplifier • 300W x 1 chan. @ 4 ohm • 500W x 1 chan. @ 2 ohm • 1000W x 1 chan. Max • Speaker-level inputs • Preamp RCA outputs

Class D Monoblock Car Amplifier • 300W x 1 chan. @ 4 ohm • 500W x 1 chan. @ 2 ohm • 1000W x 1 chan. Max • Speaker-level inputs • Preamp RCA outputs

Alpine PDX-F6 (Open Box)

600W PDX Series 4-Channel Power Density Digital Class D Car Amplifier

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600W PDX Series 4-Channel Power Density Digital Class D Car Amplifier

• Item Condition: Open Box
• RMS Power: 150W x 4-Chan. @ 4 ohm
• 600 Watts RMS
• Class D
• Variable High-Pass and Low-Pass Filter
• Blue LED Power/Status Indicator
• Compact Size

• Item Condition: Open Box
• RMS Power: 150W x 4-Chan. @ 4 ohm
• 600 Watts RMS
• Class D
• Variable High-Pass and Low-Pass Filter
• Blue LED Power/Status Indicator
• Compact Size

Soundstream SMA1-700D R/B

700W Max, Michel-Angelo Series Class D Monoblock Amplifier

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700W Max, Michel-Angelo Series Class D Monoblock Amplifier

Soundstream Michelangelo Series Amplifier • 475W x 1-Chan. @ 4 Ohm • 700W x 1-Chan. @ 2 Ohm • MOSFET Power Supply • Twin Stack Technology • Bass Remote Control Included • Tri-Guard Amp Protection

Soundstream Michelangelo Series Amplifier • 475W x 1-Chan. @ 4 Ohm • 700W x 1-Chan. @ 2 Ohm • MOSFET Power Supply • Twin Stack Technology • Bass Remote Control Included • Tri-Guard Amp Protection

Precision Power DCX 1500.1

1500W RMS, Class D MonoBlock Amplifier Factory R/B

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1500W RMS, Class D MonoBlock Amplifier Factory R/B

Class-D Monoblock Amplifier • 1000W RMS x 1 @ 2 • 1500W RMS x 1 @ 1 • QBASS PLUS Bass Boost • RCA Output • Phase Control • Adjustable Input Gain • Independant Output Crossover • PowerLOCK Connectors

Class-D Monoblock Amplifier • 1000W RMS x 1 @ 2 • 1500W RMS x 1 @ 1 • QBASS PLUS Bass Boost • RCA Output • Phase Control • Adjustable Input Gain • Independant Output Crossover • PowerLOCK Connectors

Hifonics ZRX1800.1D (Factory Refurbished)

1800W Max Monoblock Class D Zeus Series Car Amplifier

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1800W Max Monoblock Class D Zeus Series Car Amplifier

• Peak: 500W x 1 @ 4 ohm, 900W x 1 @ 2 ohm, 1800W x 1 @ 1 ohm
• Total Peak Power: 1800W
• Class D Circuitry
• Variable Bass Boost: 0 to +10 dB at 50 Hz
• Wired Bass Remote Included
• Dimensions: 14-13/16"L x 10"W x 2-1/3"H

• Peak: 500W x 1 @ 4 ohm, 900W x 1 @ 2 ohm, 1800W x 1 @ 1 ohm
• Total Peak Power: 1800W
• Class D Circuitry
• Variable Bass Boost: 0 to +10 dB at 50 Hz
• Wired Bass Remote Included
• Dimensions: 14-13/16"L x 10"W x 2-1/3"H

Audiobahn A12001DT R/B

2400W Max, Class D Monoblock Amplifier (Factory Refurbished)

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2400W Max, Class D Monoblock Amplifier (Factory Refurbished)

Class D Monoblock Amplifier • 2400W Max • 1200W 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)

Class D Monoblock Amplifier • 2400W Max • 1200W 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)

SoundStorm (SSL) EV4000D OPEN BOX INCOMPLETE

4000W Max, Evolution Series Class D Monoblock Power Amplifier

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4000W Max, Evolution Series Class D Monoblock Power Amplifier

Missing manual, used and previously installed
• RMS: 1600W x 1 @ 4 ohm
• Peak: 3000W x 1 @ 2 ohm, 4000W x 1 @ 1 ohm
• Wired Bass Level Remote
• Bass Boost: 0-18 dB
• DataLink Cable for Connecting Two Evolution Amps
• Dimensions: 10"D x 15"W x 2-3/8"H

Missing manual, used and previously installed
• RMS: 1600W x 1 @ 4 ohm
• Peak: 3000W x 1 @ 2 ohm, 4000W x 1 @ 1 ohm
• Wired Bass Level Remote
• Bass Boost: 0-18 dB
• DataLink Cable for Connecting Two Evolution Amps
• Dimensions: 10"D x 15"W x 2-3/8"H

Audiobahn A18001DT R/B

3600W Max, Class D MonoBlock Amplifier (Factory Refurbished)

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3600W Max, Class D MonoBlock Amplifier (Factory Refurbished)

3600W Max, 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)

3600W Max, 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)

Soundstream DTR1.2200D R/B

2200W RMS, Class D Monoblock D-Tower Series Amplifier

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2200W RMS, Class D Monoblock D-Tower Series Amplifier

Tower Series Monoblock Class D Car Amplifier • 1400W x 1 chan. @ 2 ohm • 2200W RMS • Vertical stereo amplifier • MOSFET power supply • Aluminum alloy heat sink • LED power and protection indicators

Tower Series Monoblock Class D Car Amplifier • 1400W x 1 chan. @ 2 ohm • 2200W RMS • Vertical stereo amplifier • MOSFET power supply • Aluminum alloy heat sink • LED power and protection indicators

Alpine PDX-4.100 Open Box

4-Channel Power Density Digital Amplifier (PDX4.100)

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4-Channel Power Density Digital Amplifier (PDX4.100)

4-Channel Power Density Digital Amplifier • 100W x 4 chan. @ 4 Ohm • class D amp design • stackable installation design • MOSFET power supply • quick connect power connectors

4-Channel Power Density Digital Amplifier • 100W x 4 chan. @ 4 Ohm • class D amp design • stackable installation design • MOSFET power supply • quick connect power connectors

MTX Audio TA7801 Thunder 7801 R/B**MISSING BASS REMOTE**

REFURBISHED, MISSING BASS REMOTE Class D Monoblock Super Amplifier Thunder7801

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REFURBISHED, MISSING BASS REMOTE Class D Monoblock Super Amplifier Thunder7801

Thunder Super Amplifier • 800W RMS x 1 @ 2 • 1200W RMS x 1 @ 1 • Prizm EFX • Xtant Cooling Technology • Wired Remote • Built-In Capacitor Terminals

Thunder Super Amplifier • 800W RMS x 1 @ 2 • 1200W RMS x 1 @ 1 • Prizm EFX • Xtant Cooling Technology • Wired Remote • Built-In Capacitor Terminals

Alpine PDX-4.100 R/B

4-Channel Power Density Digital Amplifier (PDX4.100)

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4-Channel Power Density Digital Amplifier (PDX4.100)

4-Channel Power Density Digital Amplifier • 100W x 4 chan. @ 4 Ohm • class D amp design • stackable installation design • MOSFET power supply • quick connect power connectors

4-Channel Power Density Digital Amplifier • 100W x 4 chan. @ 4 Ohm • class D amp design • stackable installation design • MOSFET power supply • quick connect power connectors

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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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