The MB Quart NA3-750.1 is a Nautic 750 watt mono block marine amplifier with marine specific connectors and an included bass remote. Its sound contouring controls, onboard crossover, bass boost and input sensitivity sit behind a top mounted panel.
It is rated at 1 x 750 watts at 1 ohm and finished in Nautic gloss white. MB Quart lists it as IPX rated for water resistance.
This marine subwoofer amp is a mono marine amplifier and marine sub amp in one. As a mono block amplifier and boat subwoofer amplifier, it is a marine amplifier, a Nautic amplifier and an MB Quart marine amp: a 750 watt amplifier with a bass remote included.
Key Features
- 750 W at 1 ohm, 500 W at 2 ohms, 300 W at 4 ohms (per MB Quart)
- Variable low pass 50-250 Hz, bass boost 0-12 dB, subsonic off/25 Hz
- Bass remote included for level control from the seat or helm
- DC signal sense auto turn-on (can be switched off)
- Sealed, grommeted output connections; RCA jacks prewired to the board
- Gloss white epoxy finish over a heavy duty heat sink
Built To Solve: Thin Bass on the Water
- Subwoofers that lack power outdoors
- Exposed amp controls that collect spray
- Running a remote turn-on wire to the amp
Best For: Powering a Marine Subwoofer
- Boats adding or upgrading a subwoofer
- Installs that want bass control from the helm
- Owners who want a white marine finish
Specifications
- Channels: 1 (mono block)
- Power: 1 x 750 W @ 1 ohm, 1 x 500 W @ 2 ohms, 1 x 300 W @ 4 ohms
- Low pass: 50-250 Hz; bass boost 0-12 dB; subsonic off/25 Hz
- Frequency response: 10-250 Hz
- Signal to noise: >99 dB; THD: <0.01%
- Input sensitivity: 0.02-9 V
- Wire: 10 AWG power/ground, 12 AWG speaker
- Amp size: 10.0 x 6.0 x 2.5 in, 6.05 lb
- Color: white
- Warranty: 1 year (per MB Quart)
- Manufacturer Part Number: NA3-750.1
Fitment
MB Quart lists the NA3-750.1 as universal for marine and powersports use. It has no vehicle-specific fitment. Confirm mounting space and wiring before you order.
FAQ
How much power does the NA3-750.1 make?
MB Quart rates it at 750 watts at 1 ohm, 500 watts at 2 ohms and 300 watts at 4 ohms.
Is a bass remote included?
Yes. The bass remote lets you adjust bass from the listening position.
Do I need a remote turn-on wire?
Not always. DC signal sense turns the amp on when it receives signal on the RCA inputs. The feature can be turned off.
Is it waterproof?
MB Quart lists it as IPX rated for water resistance with sealed, grommeted connections.
Is there an install guide?
Yes. The MB Quart Nautic NA3 amplifier quick start guide is attached to this listing.
Why MB Quart
MB Quart builds its Nautic marine and powersports audio and its UTV-tuned systems to be torture tested for harsh outdoor use, with IPX-rated speakers, potted or sealed electronics and plug-and-play harnessing. Dunes 2 Dezert SXS stocks the MB Quart line so you can build a complete, matched system from one source and get fitment help before you order.
Add the Bass
Pair the NA3-750.1 with an amplifier wiring kit and an MB Quart source unit. Related products below list matching MB Quart parts.
