The MB Quart Discus DA2-500.5D is a compact waterproof 500 watt 5-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.
A 5 channel amp lets one chassis run a whole system. As a 5 channel marine amp, UTV amplifier, UTV amp or boat amplifier, it can stand in for two separate amplifiers, and its IP67 rating makes it a true waterproof amplifier. In MB Quart's lineup it is the MB Quart Discus amplifier for full systems, and the most complete MB Quart amp in the Discus range. For a marine amplifier that is also an MB Quart amplifier built for powersports, start here.
Key Features
- 500 watt max Class D, 5-channel
- 4 x 50 + 1 x 225 watts at 2 ohms
- 4 x 35 + 1 x 150 watts at 4 ohms
- 1 x 350 watts at 1 ohm (CH5 only)
- 2 x 100 watts bridged at 4 ohms (CH1-4)
- 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
- Wired bass remote included
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 5-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
- One-amp systems running four speakers and a subwoofer
Specifications
- Channels: 5-channel
- Power: 4 x 50 + 1 x 225 watts at 2 ohms
- Power: 4 x 35 + 1 x 150 watts at 4 ohms
- Power: 1 x 350 watts at 1 ohm (CH5 only)
- Power: 2 x 100 watts bridged at 4 ohms (CH1-4)
- Crossover: CH1-4 switched full / high pass; CH5 low pass 50Hz-150Hz, subsonic 15Hz-50Hz, bass boost 0 or 12dB
- Input sensitivity: 0.2V-9V
- Power terminal: 4 AWG; speaker wire: 12 AWG
- Fusing: 40A external
- IP rating: IP67
- Amp dimensions: 10.625 x 3.875 x 1.875 in; amp weight 5.1 lbs
- Color: Black; warranty: 1 year
- Manufacturer Part Number: DA2-500.5D
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 DA2-500.5D 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 DA2-500.5D make?
MB Quart rates it at 500 watts max: 4 x 50 + 1 x 225 watts at 2 ohms; 4 x 35 + 1 x 150 watts at 4 ohms; 1 x 350 watts at 1 ohm (CH5 only); 2 x 100 watts bridged at 4 ohms (CH1-4).
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 40A external fusing. MB Quart publishes a Discus DA2 quick start guide.
Does it include a bass remote?
Yes. MB Quart includes a wired bass remote for adjusting bass from anywhere in the vehicle.
Can it run speakers and a subwoofer?
Yes. MB Quart lists 2, 4 or 5 channel operation, with channel 5 dedicated to a subwoofer.
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 5-Channel Amplifier
Plan speaker impedance, power wire and fusing for the DA2-500.5D 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.
