Name: MB Quart - 640W Class AB Bridgeable Multichannel Amplifier - Black
Brand: MB Quart
SKU: 9120093

Key Specs
- Amplifier Class: AB (An amplifier's mode of operation, specifically the conditions in which its electrical current flows for the duration of an audio signal, determines its class. Each class has its strengths and weaknesses when it comes to power efficiency, levels of crossover distortion, and overall sound quality.)
- Number Of Channels: 4
- Bass Boost: Variable (Circuitry that boosts the bass response of the amplifier, improving audio reproduction enhancing the sound of low frequencies. Fixed boost means the level of bass response is preset, whereas variable boost allows the user to make adjustments.)
- Bridgeable: true (Bridging an amplifier increases the power it supplies to the speaker(s).)
- Low-Pass Crossover: Variable (Devices with this function allow only audio frequencies below a chosen cut-off frequency to pass through to a speaker or sound system. A device may have a cut-off frequency predetermined by its manufacturer (fixed), multiple cut-off frequency options to choose from (selectable), or have the capability for the frequency to be configured by the user (variable).)
- High-Pass Crossover: Variable (Devices with this function allow only audio frequencies above a chosen cut-off frequency to pass through to a speaker or sound system. A device may have a cut-off frequency predetermined by its manufacturer (fixed), multiple cut-off frequency options to choose from (selectable), or have the capability for the frequency to be configured by the user (variable).)
General
- Brand: MB Quart
- Model Number: ZA1-640.4
- Product Name: 640W Class AB Bridgeable Multichannel Amplifier
- Color: Black
Audio Power
- Amplifier Class: AB (An amplifier's mode of operation, specifically the conditions in which its electrical current flows for the duration of an audio signal, determines its class. Each class has its strengths and weaknesses when it comes to power efficiency, levels of crossover distortion, and overall sound quality.)
Audio
- Number Of Channels: 4
- Minimum Frequency Response: 10 hertz (Describes the maximum range of frequencies or musical tones a product can reproduce, from very low tones to very high treble tones. The minimum frequency or musical tone the speaker can reproduce. High treble tones have higher frequencies while low tones and deep bass have lower frequencies.)
- Maximum Frequency Response: 45 kilohertz (Describes the maximum range of frequencies or musical tones a product can reproduce, from very low tones to very high treble tones. The maximum frequency or musical tone the speaker can reproduce. High treble tones have higher frequencies while low tones and deep bass have lower frequencies.)
- Signal-to-Noise Ratio (SNR): 90 decibels (The ratio of the desired signal's strength to the level of background noise. A ratio higher than 1:1, which equates to greater than 0 decibels, indicates more signal than noise.)
- Bass Boost: Variable (Circuitry that boosts the bass response of the amplifier, improving audio reproduction enhancing the sound of low frequencies. Fixed boost means the level of bass response is preset, whereas variable boost allows the user to make adjustments.)
Features
- Bridgeable: true (Bridging an amplifier increases the power it supplies to the speaker(s).)
- Low-Pass Crossover: Variable (Devices with this function allow only audio frequencies below a chosen cut-off frequency to pass through to a speaker or sound system. A device may have a cut-off frequency predetermined by its manufacturer (fixed), multiple cut-off frequency options to choose from (selectable), or have the capability for the frequency to be configured by the user (variable).)
- High-Pass Crossover: Variable (Devices with this function allow only audio frequencies above a chosen cut-off frequency to pass through to a speaker or sound system. A device may have a cut-off frequency predetermined by its manufacturer (fixed), multiple cut-off frequency options to choose from (selectable), or have the capability for the frequency to be configured by the user (variable).)
Dimensions
- Product Height: 2.2 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
- Product Width: 16.5 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
- Product Depth: 9.2 inches (The out of box depth of the item. Depth is measured as the distance from the front of the item to the back as it would be primarily used or placed.)
- Product Weight: 10.7 pounds (The out of box weight of the item.)
Warranty
- Warranty - Parts: 1 year
- Warranty - Labor: None
Other
- UPC: 806576224556

MB Quart Amplifier: With a high-frequency power supply, Q-Stasis preamplifier stage and electronic crossover, this multichannel amplifier makes it easy to boost the audio in your vehicle. The focused-mass aluminum heat sink ensures components remain cool.

Up to 640W (160W x 4) @ 2 ohms: As well as up to 320W (80W x 4) @ 4 ohms or 640W (320W x 2) @ 4 ohms bridged for robust audio. The high-frequency power supply delivers maximum power with minimal impact on your vehicle's electrical system.
Variable electronic crossover: With a 60Hz - 13kHz high-pass range and a 30-250Hz low-pass range allows precise control of the amplifier output.
Top-mounted controls: Make operation simple.
Q-Stasis preamplifier stage: Allows low-voltage signals from the source to enter the amplifier with minimal distortion.
Focused-mass aluminum heat sink: Helps dissipate heat to keep components cool.
LED system protection circuitry: With overload and speaker short protection to safeguard the amplifier. Includes lighted indicators on the end panel that keep you apprised.
RCA outputs: Offer a reliable connection. You can also daisy-chain multiple amplifiers together (additional amplifiers not included).
Up to 640W (160W x 4) @ 2 ohms: As well as up to 320W (80W x 4) @ 4 ohms or 640W (320W x 2) @ 4 ohms bridged for robust audio. The high-frequency power supply delivers maximum power with minimal impact on your vehicle's electrical system.
Variable electronic crossover: With a 60Hz - 13kHz high-pass range and a 30-250Hz low-pass range allows precise control of the amplifier output.
Top-mounted controls: Make operation simple.
Q-Stasis preamplifier stage: Allows low-voltage signals from the source to enter the amplifier with minimal distortion.
Focused-mass aluminum heat sink: Helps dissipate heat to keep components cool.
LED system protection circuitry: With overload and speaker short protection to safeguard the amplifier. Includes lighted indicators on the end panel that keep you apprised.
RCA outputs: Offer a reliable connection. You can also daisy-chain multiple amplifiers together (additional amplifiers not included).