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  1. Home
  2. MB Quart Store
  3. Discontinued MB Quart Car Audio & Electronics
  4. Discontinued MB Quart Car Amplifiers
  5. Discontinued MB Quart Class-D Amplifiers

Discontinued MB Quart Class-D Amplifiers

Compact and efficient, MB Quart Class-D Amplifiers deliver high-quality sound.

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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.
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.
Condition

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MB Quart RM440.4

440W 4-Channel Reference MYKRO Series Hybrid Class D Full-Range Car Power Amplifier (RM4404)

RM440.4 big DISCONTINUED
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MB Quart RM440.4

440W 4-Channel Reference MYKRO Series Hybrid Class D Full-Range Car Power Amplifier (RM4404)

• 75W x 4-Chan. @ 4 ohm
• 110W x 4-Chan. @ 2 ohm
• 220W x 2 Chan. @ 4 ohm
• 4-Way System Protection
• 4/3/2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• FLUID-FETS Circuit for Smooth Sound Quality

2

• 75W x 4-Chan. @ 4 ohm
• 110W x 4-Chan. @ 2 ohm
• 220W x 2 Chan. @ 4 ohm
• 4-Way System Protection
• 4/3/2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• FLUID-FETS Circuit for Smooth Sound Quality

MB Quart ONX1.1600D (Factory Refurbished)

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

ONX1.1600D-2 big DISCONTINUED
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MB Quart ONX1.1600D (Factory Refurbished)

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

MB Quart ONX1.1000D (Factory Refurbished)

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

ONX1.1000D big DISCONTINUED
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MB Quart ONX1.1000D (Factory Refurbished)

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

2

• 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

MB Quart RM740.5

740W Max 5-Channel Reference MYKRO Series Hybrid Class D Full-Range Car Power Amplifier

RM740.5 big DISCONTINUED
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MB Quart RM740.5

740W Max 5-Channel Reference MYKRO Series Hybrid Class D Full-Range Car Power Amplifier

• 75W x 4 Chan. @ 4 ohm
• 110W x 4 Chan. @ 2 ohm
• 220W x 2 Chan. @ 4 ohm
• 4-Way System Protection
• 5/4/3/2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• FLUID-FETS Circuit for Smooth Sound Quality

3

• 75W x 4 Chan. @ 4 ohm
• 110W x 4 Chan. @ 2 ohm
• 220W x 2 Chan. @ 4 ohm
• 4-Way System Protection
• 5/4/3/2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• FLUID-FETS Circuit for Smooth Sound Quality

MB Quart DSC 1500.1D (DSC1500.1D)

1500W RMS, Discus Series Class D Monoblock Amplifier (DSC1500.1D)

DSC-1500.1D big DISCONTINUED
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MB Quart DSC 1500.1D (DSC1500.1D)

1500W RMS, Discus Series Class D Monoblock Amplifier (DSC1500.1D)

Discus Series Class D Monoblock Car Amplifier • 375W x 1 chan. @ 4 ohm • 750W x 1 chan. @ 2 ohm • 1500W x 1 chan. @ 1 ohm • Unbalanced RCA inputs • Damping Factor: >180 • Subsonic Filter (15-35 Hz)

20

Discus Series Class D Monoblock Car Amplifier • 375W x 1 chan. @ 4 ohm • 750W x 1 chan. @ 2 ohm • 1500W x 1 chan. @ 1 ohm • Unbalanced RCA inputs • Damping Factor: >180 • Subsonic Filter (15-35 Hz)

MB Quart OA1550.1D OPEN BOX COMPLETE

1500W Mono Block Onyx Series Class D Amplifier

OA1550.1D big DISCONTINUED
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MB Quart OA1550.1D OPEN BOX COMPLETE

1500W Mono Block Onyx Series Class D Amplifier

• RMS: 475W x 1 @ 4 ohm, 750W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total Peak Power: 1000W
• Fluid-Fets MOSFET Power Supply
• Q-Stasis Pre-Amplifier Stage
• Heavy Duty Aluminum Alloy Heat-Sink
• Dimensions: 9.50"W x 14.41"L x 2.34"H

• RMS: 475W x 1 @ 4 ohm, 750W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total Peak Power: 1000W
• Fluid-Fets MOSFET Power Supply
• Q-Stasis Pre-Amplifier Stage
• Heavy Duty Aluminum Alloy Heat-Sink
• Dimensions: 9.50"W x 14.41"L x 2.34"H

MB Quart RA1000.1 OPEN BOX COMPLETE

1000W Class D 1-Channel Monoblock Reference Series Amplifier

RA1000.1 big DISCONTINUED
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MB Quart RA1000.1 OPEN BOX COMPLETE

1000W Class D 1-Channel Monoblock Reference Series Amplifier

Item is used and has been installed
• Peak: 475W x 1 @ 4 ohm, 750W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total Peak Power: 1000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 15-1/2"D x 2-3/8"H

Item is used and has been installed
• Peak: 475W x 1 @ 4 ohm, 750W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total Peak Power: 1000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 15-1/2"D x 2-3/8"H

MB Quart ONX1.2000D (Factory Refurbished)

2000W ONYX Series Class D Monoblock Amplifier

ONX1.2000D big DISCONTINUED
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MB Quart ONX1.2000D (Factory Refurbished)

2000W ONYX Series Class D Monoblock Amplifier

• Peak: 650W x 1 @ 4 ohm, 1300W x 1 @ 2 ohm, 2000W x 1 @ 1 ohm
• Total Peak Power: 2000W
• Wired Bass Remote Included
• Bass Boost: 0-10 dB
• 1 Pair of Preamp Outputs
• Dimensions: 14-7/8"L x 9"W x 2-1/2"H

• Peak: 650W x 1 @ 4 ohm, 1300W x 1 @ 2 ohm, 2000W x 1 @ 1 ohm
• Total Peak Power: 2000W
• Wired Bass Remote Included
• Bass Boost: 0-10 dB
• 1 Pair of Preamp Outputs
• Dimensions: 14-7/8"L x 9"W x 2-1/2"H

MB Quart RA2000.1 OPEN BOX COMPLETE

2000W Class D 1-Channel Monoblock Reference Series Amplifier

RA2000.1 big DISCONTINUED
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MB Quart RA2000.1 OPEN BOX COMPLETE

2000W Class D 1-Channel Monoblock Reference Series Amplifier

Used and previously installed
• Peak: 650W x 1 @ 4 ohm, 1300W x 1 @ 2 ohm, 2000W x 1 @ 1 ohm
• Total Peak Power: 4000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 20-1/2"D x 2-3/8"H

Used and previously installed
• Peak: 650W x 1 @ 4 ohm, 1300W x 1 @ 2 ohm, 2000W x 1 @ 1 ohm
• Total Peak Power: 4000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 20-1/2"D x 2-3/8"H

MB Quart DSC 1500.1D (DSC1500.1D) Open Box

(Open Box) 1500W RMS, Discus Series Class D Monoblock Amplifier (DSC1500.1D)

DSC-1500.1D big DISCONTINUED
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MB Quart DSC 1500.1D (DSC1500.1D) Open Box

(Open Box) 1500W RMS, Discus Series Class D Monoblock Amplifier (DSC1500.1D)

Discus Series Class D Monoblock Car Amplifier • 375W x 1 chan. @ 4 ohm • 750W x 1 chan. @ 2 ohm • 1500W x 1 chan. @ 1 ohm • Unbalanced RCA inputs • Damping Factor: >180 • Subsonic Filter (15-35 Hz)

Discus Series Class D Monoblock Car Amplifier • 375W x 1 chan. @ 4 ohm • 750W x 1 chan. @ 2 ohm • 1500W x 1 chan. @ 1 ohm • Unbalanced RCA inputs • Damping Factor: >180 • Subsonic Filter (15-35 Hz)

MB Quart RA2000.1-OPEN BOX

2000W Class D 1-Channel Monoblock Reference Series Amplifier

RA2000.1 big DISCONTINUED
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MB Quart RA2000.1-OPEN BOX

2000W Class D 1-Channel Monoblock Reference Series Amplifier

• Peak: 650W x 1 @ 4 ohm, 1300W x 1 @ 2 ohm, 2000W x 1 @ 1 ohm
• Total Peak Power: 4000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 20-1/2"D x 2-3/8"H

• Peak: 650W x 1 @ 4 ohm, 1300W x 1 @ 2 ohm, 2000W x 1 @ 1 ohm
• Total Peak Power: 4000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 20-1/2"D x 2-3/8"H

MB Quart OA1100.5-RB (Factory Refurbished)

1100W Max Class D 5-Channel Onyx Series Amplifier

OA1100.5 big DISCONTINUED
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MB Quart OA1100.5-RB (Factory Refurbished)

1100W Max Class D 5-Channel Onyx Series Amplifier

• Full-Range RMS: 75W x 4 @ 4 ohm, 150W x 4 @ 2 ohm
• Subwoofer RMS: 350W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Class D Circuitry
• FLUID-FETS MOSFETS Circuit
• Heavy Duty Black Onyx
• Dimensions: 9-7/16"W x 16"D x 2-1/4"H

• Full-Range RMS: 75W x 4 @ 4 ohm, 150W x 4 @ 2 ohm
• Subwoofer RMS: 350W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Class D Circuitry
• FLUID-FETS MOSFETS Circuit
• Heavy Duty Black Onyx
• Dimensions: 9-7/16"W x 16"D x 2-1/4"H

MB Quart RA1000.1 (Factory Refurbished)

1000W Class D 1-Channel Monoblock Reference Series Amplifier

RA1000.1 big DISCONTINUED
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MB Quart RA1000.1 (Factory Refurbished)

1000W Class D 1-Channel Monoblock Reference Series Amplifier

• Peak: 475W x 1 @ 4 ohm, 750W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total Peak Power: 1000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 15-1/2"D x 2-3/8"H

• Peak: 475W x 1 @ 4 ohm, 750W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total Peak Power: 1000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 15-1/2"D x 2-3/8"H

MB Quart ONX1.1500D (Factory Refurbished)

1500W RMS ONYX Series Class D Monoblock Amplifier (ONX-1.1500D)

ONX1.1500D big DISCONTINUED
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MB Quart ONX1.1500D (Factory Refurbished)

1500W RMS ONYX Series Class D Monoblock Amplifier (ONX-1.1500D)

ONYX Series Monoblock Class D Car Amplifier • 1500W x 1 Chan @ 1 Ohm • 1000W 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 • 1500W x 1 Chan @ 1 Ohm • 1000W x 1 Chan @ 2 Ohm • Dual Speaker Terminals • Preamp RCA Outputs • 4-Way System Protection Circuitry • Piano Black Gloss Finish

MB Quart ONX4.125 Open Box

Open Box: 1000W RMS, ONYX Series 4-Channel Amplifier (ONX-4.125)

ONX4.125 big DISCONTINUED
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MB Quart ONX4.125 Open Box

Open Box: 1000W RMS, ONYX Series 4-Channel Amplifier (ONX-4.125)

ONYX Series 4-Channel Class A/B Car Amplifier • 250W x 4 Chan @ 2 Ohm • 125W x 4 Chan @ 4 Ohm • Unbalanced RCA Input Jack • Preamp RCA Outputs • 4-Way System Protection Circuitry • Piano Black Gloss Finish

ONYX Series 4-Channel Class A/B Car Amplifier • 250W x 4 Chan @ 2 Ohm • 125W x 4 Chan @ 4 Ohm • Unbalanced RCA Input Jack • Preamp RCA Outputs • 4-Way System Protection Circuitry • Piano Black Gloss Finish

MB Quart RA2000.1 (Factory Refurbished)

2000W Class D 1-Channel Monoblock Reference Series Amplifier

RA2000.1 big DISCONTINUED
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MB Quart RA2000.1 (Factory Refurbished)

2000W Class D 1-Channel Monoblock Reference Series Amplifier

• Peak: 650W x 1 @ 4 ohm, 1300W x 1 @ 2 ohm, 2000W x 1 @ 1 ohm
• Total Peak Power: 4000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 20-1/2"D x 2-3/8"H

• Peak: 650W x 1 @ 4 ohm, 1300W x 1 @ 2 ohm, 2000W x 1 @ 1 ohm
• Total Peak Power: 4000W
• Built-In System Diagnostics
• Variable Bass EQ: 0 to +10 dB at 45 Hz
• Class D Circuitry
• Dimensions: 8-5/16"W x 20-1/2"D x 2-3/8"H

MB Quart ONX1.1500D

1500W RMS, ONYX Series Class D Monoblock Amplifier (ONX-1.1500D)

ONX1.1500D big DISCONTINUED
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MB Quart ONX1.1500D

1500W RMS, ONYX Series Class D Monoblock Amplifier (ONX-1.1500D)

ONYX Series Monoblock Class D Car Amplifier • 1500W x 1 Chan @ 1 Ohm • 1000W 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 • 1500W x 1 Chan @ 1 Ohm • 1000W x 1 Chan @ 2 Ohm • Dual Speaker Terminals • Preamp RCA Outputs • 4-Way System Protection Circuitry • Piano Black Gloss Finish

MB Quart RA1000.1 Open Box Complete

1000W Class D 1-Channel Monoblock Reference Series Amplifier

RA1000.1 big DISCONTINUED
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MB Quart RA1000.1 Open Box Complete

1000W Class D 1-Channel Monoblock Reference Series Amplifier

  • Item Condition: Open box Complete
    • • Peak: 475W x 1 @ 4 ohm, 750W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
    • Total Peak Power: 1000W
    • Built-In System Diagnostics
    • Variable Bass EQ: 0 to +10 dB at 45 Hz
    • Class D Circuitry
    • Dimensions: 8-5/16"W x 15-1/2"D x 2-3/8"H

  • Item Condition: Open box Complete
    • • Peak: 475W x 1 @ 4 ohm, 750W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
    • Total Peak Power: 1000W
    • Built-In System Diagnostics
    • Variable Bass EQ: 0 to +10 dB at 45 Hz
    • Class D Circuitry
    • Dimensions: 8-5/16"W x 15-1/2"D x 2-3/8"H

    MB Quart OA1100.5(Open Box Incomplete Used Functional)

    1100W Max Class D 5-Channel Onyx Series Amplifier(Open Box Incomplete Used Functional)

    OA1100.5 big DISCONTINUED
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    MB Quart OA1100.5(Open Box Incomplete Used Functional)

    1100W Max Class D 5-Channel Onyx Series Amplifier(Open Box Incomplete Used Functional)

    • 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 FA1-1500.1

    FORMULA Series Monoblock Class D 1500W 1 Ohm Stable Amplifier

    FA1-1500.1 big DISCONTINUED
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    MB Quart FA1-1500.1

    FORMULA Series Monoblock Class D 1500W 1 Ohm Stable Amplifier

    • FORMULA Series Monoblock Class D Amplifier
    • 1500W x 1 @ 1 ohm / 750W x 1 @ 2 ohm / 375W @ 4 ohm
    • DC Signal Sense
    • FLUID-FETS
    • Heavy duty heat-sink efficiently moves heat from the MOSFET
    • Bass Boost: 0-12dB

    • FORMULA Series Monoblock Class D Amplifier
    • 1500W x 1 @ 1 ohm / 750W x 1 @ 2 ohm / 375W @ 4 ohm
    • DC Signal Sense
    • FLUID-FETS
    • Heavy duty heat-sink efficiently moves heat from the MOSFET
    • Bass Boost: 0-12dB

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      MB Quart Class-D Amplifiers Information

      MB Quart Class-D amplifiers include efficient, Class-D circuitry. This circuit makes the most out of the limited power available from your car’s electrical system keeping your amp cool. Check out the amazing audio signal and power of the MB Quart Class-D amplifiers.
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