The MB Quart Discus DA2-500.2D is a compact waterproof 500 watt 2-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 boat amplifier is the two channel Discus. As a 2 channel marine amp, it is a strong match for a pair of tower speakers, and it also works as a marine amplifier, UTV amplifier, UTV amp or waterproof amplifier for a bridged subwoofer. In MB Quart's lineup it is the two channel MB Quart Discus amplifier, a compact MB Quart amp and a sealed MB Quart amplifier for wet installs.
Key Features
- 500 watt max Class D, 2-channel
- 2 x 250 watts at 2 ohms
- 2 x 150 watts at 4 ohms
- 1 x 500 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 2-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
- Tower speaker pairs, or one bridged subwoofer
Specifications
- Channels: 2-channel
- Power: 2 x 250 watts at 2 ohms
- Power: 2 x 150 watts at 4 ohms
- Power: 1 x 500 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: 20A external
- IP rating: IP67
- Amp dimensions: 10.625 x 3.875 x 1.875 in; amp weight 4.7 lbs
- Color: Black; warranty: 1 year
- Manufacturer Part Number: DA2-500.2D
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 DA2-500.2D 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 DA2-500.2D make?
MB Quart rates it at 500 watts max: 2 x 250 watts at 2 ohms; 2 x 150 watts at 4 ohms; 1 x 500 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 20A external fusing. MB Quart publishes a Discus DA2 quick start guide.
Can it be bridged?
Yes. MB Quart lists 1 x 500 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 2-Channel Amplifier
Plan speaker impedance, power wire and fusing for the DA2-500.2D 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.
