MB Quart MBQ-QA1-900.6DSP Q-Series 900 Watt 6-Channel Full-Range Class-D DSP Amplifier in Grey
MB Quart MBQ-QA1-900.6DSP Q-Series 900 Watt 6-Channel Full-Range Class-D DSP Amplifier in Grey
A 900W 6-channel Full-Range Class-D DSP amplifier with Bluetooth app control for PC, iPhone, and Android, delivering 6 x 150W at 2-ohm or 3 x 300W bridged at 4-ohm. Features a fully DSP-controlled signal path including parametric and 31-band graphic EQ, variable crossovers, phase adjustment, subsonic filter, and bass boost across the full 20Hz-20kHz range. Includes a wired LED bass remote. Q-Stasis low-noise pre-amplifier stage, FLUID-FETS output devices, through-glass top design with red LED accent lighting. Backed by a 2 year warranty.
Product Overview
The MB Quart MBQ-QA1-900.6DSP is a 900W 6-channel Full-Range Class-D amplifier from the Q-Series range, featuring a fully integrated DSP (Digital Signal Processor) that provides complete tuning control via dedicated PC, iPhone, and Android applications. The amplifier's integrated Bluetooth receiver enables wireless connection to the DSP app, allowing gain, crossover, EQ, phase, subsonic filter, and bass boost parameters to be adjusted in real time from a smartphone or PC without opening the boot or gaining physical access to the amplifier.
Rated power is 6 x 90W at 4-ohm, 6 x 150W at 2-ohm, and 3 x 300W bridged at 4-ohm. The Q-Stasis pre-amplifier stage reduces incoming noise from the source unit, improving signal quality before amplification. MB Quart's proprietary FLUID-FETS output devices are selected for efficient power production and high-level sound quality. A MOSFET Pulse Width Modulation power supply enables efficient output without placing excessive demand on the vehicle's electrical system.
Three input pairs of nickel-plated RCA connectors with hex screw terminals provide secure, corrosion-resistant connections. High-level inputs allow direct integration with OEM audio systems that do not have RCA outputs. A full-range RCA pass-through output pair (Ch1a and Ch1b) allows a distortion-free signal to be passed to a downstream monoblock amplifier without Y cables. An included wired LED bass remote allows adjustments to audio playback, DSP preset selection, and subwoofer and master volume from the cabin. DC Signal Sense auto turn-on activates the amplifier when a signal is detected on the high-level inputs, removing the need for a dedicated remote wire. A REM OUT function allows daisy chaining to a downstream amplifier such as the QA1-1500.1D. The through-glass top design with red LED accent lighting gives the amplifier a premium visual appearance.
Features & Benefits
Full DSP Control via Bluetooth App - PC, iPhone, Android: The integrated Bluetooth receiver connects to the MB Quart DSP application on PC, iPhone, or Android, giving complete real-time control over all signal processing parameters including crossovers, EQ, phase, gain, subsonic filter, and bass boost without physical access to the amplifier.
Parametric and 31-Band Graphic EQ via DSP: Two EQ modes are available through the DSP application - a fully variable parametric EQ for precise frequency, gain, and Q adjustment, and a 31-band graphic EQ for broad tonal shaping. Both are adjustable across the full 20Hz-20kHz range.
Q-Stasis Pre-Amplifier Stage - Low-Noise Signal Path: The Q-Stasis pre-amplifier stage is engineered to reduce incoming noise from the source unit before the signal enters the amplification chain, delivering a cleaner input signal and measurably improved signal-to-noise ratio of greater than 96dB.
FLUID-FETS Output Devices: MB Quart's proprietary FLUID-FETS output transistors are individually selected for their ability to efficiently produce power and deliver high sound quality, contributing to the amplifier's Full-Range Class-D efficiency and low THD of 1.0%.
Wired LED Bass Remote Included: The included wired LED bass remote allows in-cabin control of audio playback, DSP preset selection, and subwoofer and master volume adjustment without returning to the amplifier installation location.
DC Signal Sense Auto Turn-On with REM OUT: The DC Signal Sense function activates the amplifier automatically when a signal is detected on the high-level inputs, removing the need for a dedicated remote turn-on wire. A REM OUT function allows the remote signal to be passed to a downstream amplifier such as the QA1-1500.1D for daisy-chained system installations.
Full-Range RCA Pass-Through - Distortion-Free Downstream Signal: One pair of full-range RCA outputs (Ch1a and Ch1b) passes the signal distortion-free to a connected monoblock amplifier without the noise typically introduced by Y cables, simplifying system expansion.
Three-Stage Protection Circuitry with LED Diagnostics: Thermal, overload, DC, and speaker short protection are all monitored by the three-stage protection circuit, with lighted indicators on the amplifier end panel to identify fault conditions at a glance.
Technical Specs
| Specification | Detail |
|---|---|
| SKU | MBQ-QA1-900.6DSP |
| Amp Class | Full-Range Class-D |
| Total Channels | 6 |
| Total Max Power | 900W |
| Rated Power at 4-ohm | 6 x 90W |
| Rated Power at 2-ohm | 6 x 150W |
| Bridged Mono at 4-ohm | 3 x 300W |
| Rated Power at 1-ohm | Not rated |
| Signal to Noise Ratio | Greater than 96dB |
| THD | 1.0% |
| Frequency Response | 10 Hz - 23 kHz |
| DSP Crossover Range | 20 Hz - 20 kHz (variable high-pass and low-pass, 12dB/Octave) |
| DSP Subsonic Filter | 20 Hz - 20 kHz |
| DSP Bass Boost | 20 Hz - 20 kHz |
| DSP Phase Adjustment | 0 - 180 degrees |
| DSP EQ | Parametric (full variable) + 31-Band Graphic |
| DSP Control | Bluetooth app (PC / iPhone / Android) |
| Input Voltage (High Level) | 1.4 - 14.5V |
| Input Voltage (Low Level) | 0.5 - 5.1V |
| RCA Inputs | 3 Pair (Nickel-Plated, Hex Screw Terminals) |
| High-Level Inputs | Yes |
| RCA Pass-Through Outputs | 1 Pair (Ch1a and Ch1b, Full-Range) |
| Pre-Amp Stage | Q-Stasis |
| Output Devices | FLUID-FETS |
| Power Supply | MOSFET PWM |
| Auto Turn-On | DC Signal Sense (switchable) |
| Remote Output | REM OUT (for downstream amplifier chaining) |
| Bass Remote | Wired LED Remote (included) |
| Power Terminal | 4 AWG |
| Speaker Terminal | 12 AWG |
| Fusing | 2 x 30A Mini ATC |
| Colour | Grey |
| Design | Through-Glass Top with Red LED Accent Lighting |
| Warranty | 2 Years |
Compatible With / Goes Well With
The MBQ-QA1-900.6DSP is suited to a wide range of vehicle audio installations requiring multi-channel amplification with integrated DSP tuning. It is compatible with both aftermarket RCA source units and OEM head units via its high-level inputs. It is particularly well suited to 3-way active speaker systems, component speaker sets, or full-range speaker builds requiring individual channel control through the DSP app.
Goes Well With:
- QA1-1500.1D - MB Quart Q-Series monoblock amplifier, compatible via the MBQ-QA1-900.6DSP's RCA pass-through output and REM OUT function for a complete speaker plus subwoofer system
- Component speaker sets - The 6 independent DSP-controlled channels make this amplifier well suited to front and rear component speaker systems requiring individual tweeter, midrange, and subwoofer channel control
- DSR1 - Rockford Fosgate Digital Signal Processor as an alternative signal processing option for systems not using the onboard MB Quart DSP
Frequently Asked Questions
What is the DSP and how is it controlled on the MBQ-QA1-900.6DSP?
The DSP (Digital Signal Processor) is a built-in signal processing engine that controls all crossover, EQ, gain, phase, subsonic filter, and bass boost settings for all six channels. It is controlled wirelessly via Bluetooth through the MB Quart DSP app on PC, iPhone, or Android. The integrated Bluetooth receiver allows real-time adjustments from a smartphone or laptop without accessing the amplifier physically.
What is the difference between the parametric EQ and the 31-band graphic EQ in the DSP?
The parametric EQ allows full variable customisation of frequency, gain, and bandwidth (Q factor) for each band, making it the more precise tool for targeting and correcting specific acoustic problems. The 31-band graphic EQ provides preset frequency bands with fixed centre frequencies for broader tonal adjustment. Both are accessible through the DSP app and can be used to suit different tuning preferences and skill levels.
Can the MBQ-QA1-900.6DSP be used with a factory OEM head unit?
Yes. The amplifier includes high-level (speaker-level) inputs that allow direct connection to the speaker outputs of an OEM head unit that does not have RCA outputs. The DC Signal Sense auto turn-on feature also removes the need for a dedicated remote turn-on wire, making OEM integration straightforward.
Can I add a subwoofer amplifier to a system using the MBQ-QA1-900.6DSP?
Yes. The MBQ-QA1-900.6DSP includes a full-range RCA pass-through output pair (Ch1a and Ch1b) for feeding a downstream monoblock subwoofer amplifier without the signal degradation of Y cables. The REM OUT function also passes the remote turn-on signal to the secondary amplifier, enabling the entire system to power on from a single source. The MB Quart QA1-1500.1D monoblock amplifier is a recommended companion.
What protection circuits are built into the MBQ-QA1-900.6DSP?
The amplifier features a three-stage protection circuit that monitors thermal conditions, overload, DC offset, and speaker short circuits. LED indicators on the amplifier's end panel illuminate to identify which type of fault condition has been triggered, making fault diagnosis straightforward without the need for external test equipment.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
MB Quart MBQ-QA1-900.6DSP Q-Series 900 Watt 6-Channel Full-Range Class-D DSP Amplifier in Grey
A 900W 6-channel Full-Range Class-D DSP amplifier with Bluetooth app control for PC, iPhone, and Android, delivering 6 x 150W at 2-ohm or 3 x 300W bridged at 4-ohm. Features a fully DSP-controlled signal path including parametric and 31-band graphic EQ, variable crossovers, phase adjustment, subsonic filter, and bass boost across the full 20Hz-20kHz range. Includes a wired LED bass remote. Q-Stasis low-noise pre-amplifier stage, FLUID-FETS output devices, through-glass top design with red LED accent lighting. Backed by a 2 year warranty.
Product Overview
The MB Quart MBQ-QA1-900.6DSP is a 900W 6-channel Full-Range Class-D amplifier from the Q-Series range, featuring a fully integrated DSP (Digital Signal Processor) that provides complete tuning control via dedicated PC, iPhone, and Android applications. The amplifier's integrated Bluetooth receiver enables wireless connection to the DSP app, allowing gain, crossover, EQ, phase, subsonic filter, and bass boost parameters to be adjusted in real time from a smartphone or PC without opening the boot or gaining physical access to the amplifier.
Rated power is 6 x 90W at 4-ohm, 6 x 150W at 2-ohm, and 3 x 300W bridged at 4-ohm. The Q-Stasis pre-amplifier stage reduces incoming noise from the source unit, improving signal quality before amplification. MB Quart's proprietary FLUID-FETS output devices are selected for efficient power production and high-level sound quality. A MOSFET Pulse Width Modulation power supply enables efficient output without placing excessive demand on the vehicle's electrical system.
Three input pairs of nickel-plated RCA connectors with hex screw terminals provide secure, corrosion-resistant connections. High-level inputs allow direct integration with OEM audio systems that do not have RCA outputs. A full-range RCA pass-through output pair (Ch1a and Ch1b) allows a distortion-free signal to be passed to a downstream monoblock amplifier without Y cables. An included wired LED bass remote allows adjustments to audio playback, DSP preset selection, and subwoofer and master volume from the cabin. DC Signal Sense auto turn-on activates the amplifier when a signal is detected on the high-level inputs, removing the need for a dedicated remote wire. A REM OUT function allows daisy chaining to a downstream amplifier such as the QA1-1500.1D. The through-glass top design with red LED accent lighting gives the amplifier a premium visual appearance.
Features & Benefits
Full DSP Control via Bluetooth App - PC, iPhone, Android: The integrated Bluetooth receiver connects to the MB Quart DSP application on PC, iPhone, or Android, giving complete real-time control over all signal processing parameters including crossovers, EQ, phase, gain, subsonic filter, and bass boost without physical access to the amplifier.
Parametric and 31-Band Graphic EQ via DSP: Two EQ modes are available through the DSP application - a fully variable parametric EQ for precise frequency, gain, and Q adjustment, and a 31-band graphic EQ for broad tonal shaping. Both are adjustable across the full 20Hz-20kHz range.
Q-Stasis Pre-Amplifier Stage - Low-Noise Signal Path: The Q-Stasis pre-amplifier stage is engineered to reduce incoming noise from the source unit before the signal enters the amplification chain, delivering a cleaner input signal and measurably improved signal-to-noise ratio of greater than 96dB.
FLUID-FETS Output Devices: MB Quart's proprietary FLUID-FETS output transistors are individually selected for their ability to efficiently produce power and deliver high sound quality, contributing to the amplifier's Full-Range Class-D efficiency and low THD of 1.0%.
Wired LED Bass Remote Included: The included wired LED bass remote allows in-cabin control of audio playback, DSP preset selection, and subwoofer and master volume adjustment without returning to the amplifier installation location.
DC Signal Sense Auto Turn-On with REM OUT: The DC Signal Sense function activates the amplifier automatically when a signal is detected on the high-level inputs, removing the need for a dedicated remote turn-on wire. A REM OUT function allows the remote signal to be passed to a downstream amplifier such as the QA1-1500.1D for daisy-chained system installations.
Full-Range RCA Pass-Through - Distortion-Free Downstream Signal: One pair of full-range RCA outputs (Ch1a and Ch1b) passes the signal distortion-free to a connected monoblock amplifier without the noise typically introduced by Y cables, simplifying system expansion.
Three-Stage Protection Circuitry with LED Diagnostics: Thermal, overload, DC, and speaker short protection are all monitored by the three-stage protection circuit, with lighted indicators on the amplifier end panel to identify fault conditions at a glance.
Technical Specs
| Specification | Detail |
|---|---|
| SKU | MBQ-QA1-900.6DSP |
| Amp Class | Full-Range Class-D |
| Total Channels | 6 |
| Total Max Power | 900W |
| Rated Power at 4-ohm | 6 x 90W |
| Rated Power at 2-ohm | 6 x 150W |
| Bridged Mono at 4-ohm | 3 x 300W |
| Rated Power at 1-ohm | Not rated |
| Signal to Noise Ratio | Greater than 96dB |
| THD | 1.0% |
| Frequency Response | 10 Hz - 23 kHz |
| DSP Crossover Range | 20 Hz - 20 kHz (variable high-pass and low-pass, 12dB/Octave) |
| DSP Subsonic Filter | 20 Hz - 20 kHz |
| DSP Bass Boost | 20 Hz - 20 kHz |
| DSP Phase Adjustment | 0 - 180 degrees |
| DSP EQ | Parametric (full variable) + 31-Band Graphic |
| DSP Control | Bluetooth app (PC / iPhone / Android) |
| Input Voltage (High Level) | 1.4 - 14.5V |
| Input Voltage (Low Level) | 0.5 - 5.1V |
| RCA Inputs | 3 Pair (Nickel-Plated, Hex Screw Terminals) |
| High-Level Inputs | Yes |
| RCA Pass-Through Outputs | 1 Pair (Ch1a and Ch1b, Full-Range) |
| Pre-Amp Stage | Q-Stasis |
| Output Devices | FLUID-FETS |
| Power Supply | MOSFET PWM |
| Auto Turn-On | DC Signal Sense (switchable) |
| Remote Output | REM OUT (for downstream amplifier chaining) |
| Bass Remote | Wired LED Remote (included) |
| Power Terminal | 4 AWG |
| Speaker Terminal | 12 AWG |
| Fusing | 2 x 30A Mini ATC |
| Colour | Grey |
| Design | Through-Glass Top with Red LED Accent Lighting |
| Warranty | 2 Years |
Compatible With / Goes Well With
The MBQ-QA1-900.6DSP is suited to a wide range of vehicle audio installations requiring multi-channel amplification with integrated DSP tuning. It is compatible with both aftermarket RCA source units and OEM head units via its high-level inputs. It is particularly well suited to 3-way active speaker systems, component speaker sets, or full-range speaker builds requiring individual channel control through the DSP app.
Goes Well With:
- QA1-1500.1D - MB Quart Q-Series monoblock amplifier, compatible via the MBQ-QA1-900.6DSP's RCA pass-through output and REM OUT function for a complete speaker plus subwoofer system
- Component speaker sets - The 6 independent DSP-controlled channels make this amplifier well suited to front and rear component speaker systems requiring individual tweeter, midrange, and subwoofer channel control
- DSR1 - Rockford Fosgate Digital Signal Processor as an alternative signal processing option for systems not using the onboard MB Quart DSP
Frequently Asked Questions
What is the DSP and how is it controlled on the MBQ-QA1-900.6DSP?
The DSP (Digital Signal Processor) is a built-in signal processing engine that controls all crossover, EQ, gain, phase, subsonic filter, and bass boost settings for all six channels. It is controlled wirelessly via Bluetooth through the MB Quart DSP app on PC, iPhone, or Android. The integrated Bluetooth receiver allows real-time adjustments from a smartphone or laptop without accessing the amplifier physically.
What is the difference between the parametric EQ and the 31-band graphic EQ in the DSP?
The parametric EQ allows full variable customisation of frequency, gain, and bandwidth (Q factor) for each band, making it the more precise tool for targeting and correcting specific acoustic problems. The 31-band graphic EQ provides preset frequency bands with fixed centre frequencies for broader tonal adjustment. Both are accessible through the DSP app and can be used to suit different tuning preferences and skill levels.
Can the MBQ-QA1-900.6DSP be used with a factory OEM head unit?
Yes. The amplifier includes high-level (speaker-level) inputs that allow direct connection to the speaker outputs of an OEM head unit that does not have RCA outputs. The DC Signal Sense auto turn-on feature also removes the need for a dedicated remote turn-on wire, making OEM integration straightforward.
Can I add a subwoofer amplifier to a system using the MBQ-QA1-900.6DSP?
Yes. The MBQ-QA1-900.6DSP includes a full-range RCA pass-through output pair (Ch1a and Ch1b) for feeding a downstream monoblock subwoofer amplifier without the signal degradation of Y cables. The REM OUT function also passes the remote turn-on signal to the secondary amplifier, enabling the entire system to power on from a single source. The MB Quart QA1-1500.1D monoblock amplifier is a recommended companion.
What protection circuits are built into the MBQ-QA1-900.6DSP?
The amplifier features a three-stage protection circuit that monitors thermal conditions, overload, DC offset, and speaker short circuits. LED indicators on the amplifier's end panel illuminate to identify which type of fault condition has been triggered, making fault diagnosis straightforward without the need for external test equipment.
