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Discontinued Class-D Amplifiers

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Hifonics HFI1000.1D (HFI 1000.1D) (Factory Refurbished)

(Open Box) 1000W RMS, Class D Monoblock HFi Series Amplifier

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(Open Box) 1000W RMS, Class D Monoblock HFi Series Amplifier

HFi Series Monoblock Class D Car Amplifier • 750W x 1-Chan. @ 2 Ohm • 1000W x 1-Chan. @ 1 Ohm • Wired HFR-3 Bass Remote • 4-Way System Protection Circuitry • Preamp RCA Outputs • Blue Illuminated Hifonics Badge

HFi Series Monoblock Class D Car Amplifier • 750W x 1-Chan. @ 2 Ohm • 1000W x 1-Chan. @ 1 Ohm • Wired HFR-3 Bass Remote • 4-Way System Protection Circuitry • Preamp RCA Outputs • Blue Illuminated Hifonics Badge

Alpine MRX-M110 - Open Box, Good Condition Used

1100W RMS Monoblock Class D X-Power Series Car Amplifier - Open Box, Good Condition Used

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1100W RMS Monoblock Class D X-Power Series Car Amplifier - Open Box, Good Condition Used

• RMS: 650W x 1 @ 4 ohm, 1100W x 1 @ 2 ohm
• Total RMS Power: 1100W
• CEA-2006 Compliant
• Bass Boost: 0-12 dB at 50 Hz
• Multi-Stage Power Management Circuit
• Dimensions: 9"L x 13-3/8"W x 2-1/4"H

• RMS: 650W x 1 @ 4 ohm, 1100W x 1 @ 2 ohm
• Total RMS Power: 1100W
• CEA-2006 Compliant
• Bass Boost: 0-12 dB at 50 Hz
• Multi-Stage Power Management Circuit
• Dimensions: 9"L x 13-3/8"W x 2-1/4"H

Autotek SM6000.1 Open Box Complete

6000W Single Channel Monoblock Street Machine Series Class D Car Amplifier

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6000W Single Channel Monoblock Street Machine Series Class D Car Amplifier

• Item Condition: Open Box Complete
• Peak: 1500W x 1 @ 4 ohm, 3000W x 1 @ 2 ohm, 6000W x 1 @ 1 ohm
• Total Peak Power: 6000W
• 1 Pair of Preamp Outputs
• Bass Boost 0-12 dB at 50 Hz
• Iluminated Power VU Meter for Stylish Retro Look
• Dimensions: 9-3/8"W x 14-3/16"D x 2-1/2"H

• Item Condition: Open Box Complete
• Peak: 1500W x 1 @ 4 ohm, 3000W x 1 @ 2 ohm, 6000W x 1 @ 1 ohm
• Total Peak Power: 6000W
• 1 Pair of Preamp Outputs
• Bass Boost 0-12 dB at 50 Hz
• Iluminated Power VU Meter for Stylish Retro Look
• Dimensions: 9-3/8"W x 14-3/16"D x 2-1/2"H

Kenwood KAC-9105D Factory Refurbished

(Factory Refurbished) 1800W Max, Class D Monoblock Performance Series Amplifier

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(Factory Refurbished) 1800W Max, Class D Monoblock Performance Series Amplifier

GUARANTEED LOWEST PRICE. CONTACT US 24/7 • Performance Series Class D Monoblock Car Amplifier • 500W x 1 chan. @ 4 ohm • 900W x 1 chan. @ 2 ohm • >900W x 1 chan. @ 1 ohm • 1800W x 1 chan. Max • Stackable operation capable • Speaker-level inputs • Preamp RCA outputs

GUARANTEED LOWEST PRICE. CONTACT US 24/7 • Performance Series Class D Monoblock Car Amplifier • 500W x 1 chan. @ 4 ohm • 900W x 1 chan. @ 2 ohm • >900W x 1 chan. @ 1 ohm • 1800W x 1 chan. Max • Stackable operation capable • Speaker-level inputs • Preamp RCA outputs

Hifonics BRZ2400.1D Open Box Complete (Very Good, Used)

2400W RMS Brutus Series 1-Channel Monoblock Super Class D Amplifier

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2400W RMS Brutus Series 1-Channel Monoblock Super Class D Amplifier

• Item Condition: Open Box
Brutus Series Monoblock Class D Car Amplifier • 2400W x 1-Chan. @ 1 Ohm • 1700W x 1-Chan. @ 2 Ohm • 850W x 1-Chan. @ 4 Ohm • Wired HFR-3 Remote • 4-Way System Protection • Phase Shift • Silver-Plated RCA Inputs

• Item Condition: Open Box
Brutus Series Monoblock Class D Car Amplifier • 2400W x 1-Chan. @ 1 Ohm • 1700W x 1-Chan. @ 2 Ohm • 850W x 1-Chan. @ 4 Ohm • Wired HFR-3 Remote • 4-Way System Protection • Phase Shift • Silver-Plated RCA Inputs

Pioneer GM-D8704( Open Box )

600W Class FD 4-Channel GM Digital Series Amplifier w/ Wired Bass Boost Remote

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600W Class FD 4-Channel GM Digital Series Amplifier w/ Wired Bass Boost Remote

• 100W x 4-Chan. @ 4 ohm
• 150W x 4-Chan. @ 2 ohm
• 125W x 4-Chan. @ 1 ohm
• 3-Way System Protection
• 4/3/2 Channel Operation
• 4 Gauge Power and Ground Inputs
• High Power Capability with Small Size

• 100W x 4-Chan. @ 4 ohm
• 150W x 4-Chan. @ 2 ohm
• 125W x 4-Chan. @ 1 ohm
• 3-Way System Protection
• 4/3/2 Channel Operation
• 4 Gauge Power and Ground Inputs
• High Power Capability with Small Size

Rockford Fosgate Prime R500X1D

500W RMS Prime Series Class D Monoblock Amplifier (Open Box Complete)

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500W RMS Prime Series Class D Monoblock Amplifier (Open Box Complete)

• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total RMS Power: 500W
• CEA-2006 Compliant
• Remote PLC (Punch Level Control) Included
• Efficient Class-D circuit topology
• Dimensions: 8-1/2"L x 6-3/4"W x 2"H

• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total RMS Power: 500W
• CEA-2006 Compliant
• Remote PLC (Punch Level Control) Included
• Efficient Class-D circuit topology
• Dimensions: 8-1/2"L x 6-3/4"W x 2"H

Polk Audio PA D4000.4 (PAD4000.4) - Open Box, Good Condition (Used)

800W RMS PA D Series Class-D 4-Channel Car Amplifier Open Box Complete (Good, Used)

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800W RMS PA D Series Class-D 4-Channel Car Amplifier Open Box Complete (Good, Used)

• 125 Watts RMS x 4 @ 4 ohm
• 200 Watts RMS x 4 @ 2 ohm
• 400 Watts RMS x 2 @ 4 ohm, Bridged
• 4, 3 and 2 Channel Operation
• CEA-2006 Compliant
• Frequency Response: 20 - 20,000 Hz
• Selectable crossover modes: LPF / FULL / HPF , with 10x Multiplier
• Dimensions: 6-3/4" W x 10-15/16" L x 1-13/16" H

• 125 Watts RMS x 4 @ 4 ohm
• 200 Watts RMS x 4 @ 2 ohm
• 400 Watts RMS x 2 @ 4 ohm, Bridged
• 4, 3 and 2 Channel Operation
• CEA-2006 Compliant
• Frequency Response: 20 - 20,000 Hz
• Selectable crossover modes: LPF / FULL / HPF , with 10x Multiplier
• Dimensions: 6-3/4" W x 10-15/16" L x 1-13/16" H

Kenwood KAC-9106D Open Box Complete

1000W RMS Class D Monoblock Performance Series Car Amplifier

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1000W RMS Class D Monoblock Performance Series Car Amplifier

• FEATURE 1
• FEATURE 2
• FEATURE 3
• FEATURE 4
• FEATURE 5
• FEATURE 6
• FEATURE 7

• FEATURE 1
• FEATURE 2
• FEATURE 3
• FEATURE 4
• FEATURE 5
• FEATURE 6
• FEATURE 7

MB Quart ONX1.1600D (Factory Refurbished)

1600W RMS ONYX Series Class D Monoblock Amplifier (ONX-1.1600D)

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1600W RMS ONYX Series Class D Monoblock Amplifier (ONX-1.1600D)

• ONYX Series Monoblock Class D Car Amplifier
• 1600W x 1 Chan @ 1 Ohm
• 1100W x 1 Chan @ 2 Ohm
• Dual Speaker Terminals
• Preamp RCA Outputs
• 4-Way System Protection Circuitry
• Piano Black Gloss Finish

• ONYX Series Monoblock Class D Car Amplifier
• 1600W x 1 Chan @ 1 Ohm
• 1100W x 1 Chan @ 2 Ohm
• Dual Speaker Terminals
• Preamp RCA Outputs
• 4-Way System Protection Circuitry
• Piano Black Gloss Finish

EXCLUSIVE

Hifonics Brutus BXi 2608D R/B + Amplifier Kit

2600W RMS Class D Monoblock Brutus BXi Series Amplifier with 0 Gauge Amplifier Kit (BXi2608D)

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2600W RMS Class D Monoblock Brutus BXi Series Amplifier with 0 Gauge Amplifier Kit (BXi2608D)

Brutus BXi Series Class D Monoblock Car Amplifier • 850W x 1 chan. @ 4 ohm • 1700W x 1 chan. @ 2 ohm • 2600W x 1 chan. @ 1 ohm • MOSFET power supply • Soft turn-on circuitry • Included 4 Gauge Amp Kit

Brutus BXi Series Class D Monoblock Car Amplifier • 850W x 1 chan. @ 4 ohm • 1700W x 1 chan. @ 2 ohm • 2600W x 1 chan. @ 1 ohm • MOSFET power supply • Soft turn-on circuitry • Included 4 Gauge Amp Kit

Autotek MM4000.1D R/B

4000W RMS Mean Machine Series Class D 2-Channel Amplifier (MM40001D)

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4000W RMS Mean Machine Series Class D 2-Channel Amplifier (MM40001D)

Mean Machine Series 2-Channel Class D Car Amplifier • 900 Watts x 2 Chan @ 4 Ohm • 1400 Watts x 2 Chan @ 2 Ohm • 2000 Watts x 2 Chan @ 1 Ohm • MOSFET Power Supply • LED Power Indicators • TCID (Twin Coil Isolation Design)

Mean Machine Series 2-Channel Class D Car Amplifier • 900 Watts x 2 Chan @ 4 Ohm • 1400 Watts x 2 Chan @ 2 Ohm • 2000 Watts x 2 Chan @ 1 Ohm • MOSFET Power Supply • LED Power Indicators • TCID (Twin Coil Isolation Design)

Hifonics HFI1000.1D-OPEN BOX

1000W RMS Class D Monoblock HFi Series Amplifier

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1000W RMS Class D Monoblock HFi Series Amplifier

HFi Series Monoblock Class D Car Amplifier • 750W x 1-Chan. @ 2 Ohm • 1000W x 1-Chan. @ 1 Ohm • Wired HFR-3 Bass Remote • 4-Way System Protection Circuitry • Preamp RCA Outputs • Blue Illuminated Hifonics Badge

HFi Series Monoblock Class D Car Amplifier • 750W x 1-Chan. @ 2 Ohm • 1000W x 1-Chan. @ 1 Ohm • Wired HFR-3 Bass Remote • 4-Way System Protection Circuitry • Preamp RCA Outputs • Blue Illuminated Hifonics Badge

Hifonics Zeus ZRX2400.1D

2400W Max Class D Monoblock Zeus Series Amplifier (Open Box Complete)

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2400W Max Class D Monoblock Zeus Series Amplifier (Open Box Complete)

• Peak: 650W x 1 @ 4 ohm, 1200W x 1 @ 2 ohm, 2400W x 1 @ 1 ohm
• Total Peak Power: 2400W
• Class D Circuitry
• Variable Bass Boost: 0 to +10 dB at 50 Hz
• Wired Bass Remote Included
• Dimensions: 17-3/16"L x 10"W x 2-7/16"H

• Peak: 650W x 1 @ 4 ohm, 1200W x 1 @ 2 ohm, 2400W x 1 @ 1 ohm
• Total Peak Power: 2400W
• Class D Circuitry
• Variable Bass Boost: 0 to +10 dB at 50 Hz
• Wired Bass Remote Included
• Dimensions: 17-3/16"L x 10"W x 2-7/16"H

NVX MVPA4 (Open Box)

Micro-V Series 800 Watt (400W RMS) 4-Channel Bridgeable Micro Class D Compact Car Amplifier (MVPA.4)

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Micro-V Series 800 Watt (400W RMS) 4-Channel Bridgeable Micro Class D Compact Car Amplifier (MVPA.4)

• The size of a postcard with 400 Watts True RMS Output!
• • MVP Series 4-Channel Micro Class D Amplifier
• 50W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 8 Gauge Power and Ground Inputs
• Extremely Small Footprint!

• The size of a postcard with 400 Watts True RMS Output!
• • MVP Series 4-Channel Micro Class D Amplifier
• 50W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• 3-Way System Protection
• 4/3/2/1 Channel Operation
• 8 Gauge Power and Ground Inputs
• Extremely Small Footprint!

MTX Audio THUNDER500.1 (Open Box Complete)

500W RMS Class D 1-Channel Monoblock Power Car Amplifier

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500W RMS Class D 1-Channel Monoblock Power Car Amplifier

• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total Peak Power: 1000W
• 3-Way Protection Circuitry
• Selectable Bass Boost (0-6-12 dB)
• Class D Circuitry
• Dimensions: 6-5/16"W x 8-15/16"L x 2-1/4"H

• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total Peak Power: 1000W
• 3-Way Protection Circuitry
• Selectable Bass Boost (0-6-12 dB)
• Class D Circuitry
• Dimensions: 6-5/16"W x 8-15/16"L x 2-1/4"H

Polk Audio PA D1000.1 - Open Box, Good Condition (Used)

1200W RMS PA D Series Class-D Monoblock Car Amplifier Open Box Complete (Good, Used)

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1200W RMS PA D Series Class-D Monoblock Car Amplifier Open Box Complete (Good, Used)

• Item Condition - Good, Used
• 500 Watts RMS x 1 @ 4 ohm
• 800 Watts RMS x 1 @ 2 ohm
• 1200 Watts RMS x 1 @ 1 ohm
• Wired remote bass level control included
• CEA-2006 Compliant
• Signal to Noise Ration: 105 dBA
• Variable Bass Boost: 0 to +12 dB bass boost at 44 Hz
• Dimensions: 6-3/4" W x 12-15/16" L x 1-13/16" H

• Item Condition - Good, Used
• 500 Watts RMS x 1 @ 4 ohm
• 800 Watts RMS x 1 @ 2 ohm
• 1200 Watts RMS x 1 @ 1 ohm
• Wired remote bass level control included
• CEA-2006 Compliant
• Signal to Noise Ration: 105 dBA
• Variable Bass Boost: 0 to +12 dB bass boost at 44 Hz
• Dimensions: 6-3/4" W x 12-15/16" L x 1-13/16" H

West Coast Customs WCC1500.1 by MB Quart LIKE NEW INCOMPLETE

1500W Monoblock WCC Series Class D Amplifier (Same as MB Quart OA750.1)

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1500W Monoblock WCC Series Class D Amplifier (Same as MB Quart OA750.1)

Missing fuses
• 4 ohm: 375 watts x 1 chan.
• 2 ohm: 750 watts x 1 chan.
• 1 ohm: 1500 watts x 1 chan
• Pulse Width Modulated (PWM) MOSFET Power Supply

Missing fuses
• 4 ohm: 375 watts x 1 chan.
• 2 ohm: 750 watts x 1 chan.
• 1 ohm: 1500 watts x 1 chan
• Pulse Width Modulated (PWM) MOSFET Power Supply

EXCLUSIVE

Hifonics Brutus BXi 1210D R/B + Amplifier Kit

1200W RMS Brutus BXi Series Class D Monoblock Amplifier (BXi1210D) w/ 0 Gauge Amplifier Kit

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1200W RMS Brutus BXi Series Class D Monoblock Amplifier (BXi1210D) w/ 0 Gauge Amplifier Kit

• • • • • Description Coming Soon! • • • • •

• • • • • Description Coming Soon! • • • • •

MB Quart ONX1.1000D (Factory Refurbished)

1000W RMS ONYX Series Class D Monoblock Amplifier (ONX-1.1000D)

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1000W RMS ONYX Series Class D Monoblock Amplifier (ONX-1.1000D)

• Item Condition: Factory Refurbished
• ONYX Series Monoblock Class D Car Amplifier • 1000W x 1 Chan @ 1 Ohm • 750W x 1 Chan @ 2 Ohm • Dual Speaker Terminals • Preamp RCA Outputs • 4-Way System Protection Circuitry • Piano Black Gloss Finish

• Item Condition: Factory Refurbished
• ONYX Series Monoblock Class D Car Amplifier • 1000W x 1 Chan @ 1 Ohm • 750W x 1 Chan @ 2 Ohm • Dual Speaker Terminals • Preamp RCA Outputs • 4-Way System Protection Circuitry • Piano Black Gloss Finish

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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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