The MB Quart Discus DA2-520.4D is a compact waterproof 520 watt 4-channel amplifier with top mounted controls, potted internals and waterproof connectors. It is IP67 rated and listed by MB Quart for marine, mobile and powersports use.
This waterproof amplifier is the four channel Discus. As a 4 channel marine amp, it drives four speakers on a boat or in a UTV, and it serves as a boat amplifier, marine amplifier, UTV amplifier or UTV amp in tight spaces. In MB Quart's lineup it is the four channel MB Quart Discus amplifier, a higher power step up from the Nautic MB Quart amp range and an MB Quart amplifier for full speaker systems.
Key Features
- 520 watt max Class D, 4-channel
- 4 x 130 watts at 2 ohms
- 4 x 90 watts at 4 ohms
- 2 x 260 watts bridged at 4 ohms
- IP67 waterproof and dustproof
- Top mounted controls under a sealed cover: crossover, bass boost and input sensitivity
- Q-Stasis preamplifier stage and MB Quart FLUID-FET output devices
- Waterproof input and output connectors
- Overload and speaker short protection with indicators on the top panel
Built To Solve: Amplifier Failures in Wet, Dusty Machines and Boats
- Amplifiers that corrode or short when water and dust get inside
- Controls that are hard to reach once the amp is mounted
- Weak speaker or subwoofer output in a loud open-air vehicle
- Messy wiring that is hard to seal
Best For: UTV, Boat and Truck Builds Needing a 4-Channel Waterproof Amp
- UTV and side-by-side owners building a waterproof audio system
- Boat and marine installs
- Mobile builds where moisture is a risk
- Four speaker systems, or two bridged channels
Specifications
- Channels: 4-channel
- Power: 4 x 130 watts at 2 ohms
- Power: 4 x 90 watts at 4 ohms
- Power: 2 x 260 watts bridged at 4 ohms
- Crossover: Switched OFF / HPF / LPF; high pass 15Hz-300Hz, low pass 50Hz-300Hz
- Input sensitivity: 0.2V-9V
- Power terminal: 4 AWG; speaker wire: 12 AWG
- Fusing: 90A external
- IP rating: IP67
- Amp dimensions: 10.625 x 3.875 x 1.875 in; amp weight 5.05 lbs
- Color: Black; warranty: 1 year
- Manufacturer Part Number: DA2-520.4D
Fitment
MB Quart lists this product as universal: it is not specific to one machine. Fitment is not guaranteed for every mounting location; confirm space, mounting and wiring for your UTV, boat or RV before ordering.
FAQ
Is the MB Quart DA2-520.4D waterproof?
Yes. MB Quart states it meets or exceeds IP67 standards for waterproof and dustproof, with waterproof connectors and a sealed top cover over the controls.
How much power does the DA2-520.4D make?
MB Quart rates it at 520 watts max: 4 x 130 watts at 2 ohms; 4 x 90 watts at 4 ohms; 2 x 260 watts bridged at 4 ohms.
Where are the controls?
On top of the amplifier, behind a sealed cover: on-board crossover, bass boost and adjustable input sensitivity.
What wire size does it use?
MB Quart lists 4 AWG power and ground, 12 AWG speaker wire and 90A external fusing. MB Quart publishes a Discus DA2 quick start guide.
Can it be bridged?
Yes. MB Quart lists 2 x 260 watts bridged at 4 ohms.
Why MB Quart
MB Quart's Nautic and Discus lines are built for open-air use on boats, UTVs and RVs, where sun, spray, dust and vibration are part of every trip. MB Quart backs this product with a 1 year warranty.
Build a Waterproof System Around the Discus 4-Channel Amplifier
Plan speaker impedance, power wire and fusing for the DA2-520.4D using MB Quart's ratings before you mount it. Dunes 2 Dezert SXS carries MB Quart Nautic speakers, tower speakers and other Discus amplifiers to complete a UTV or boat system.
