MB Quart

MB Quart NA3-560.4 4-Channel Marine Amplifier — 70W RMS x 4

Name: Singh Electronics
Address: 7003 Steeles Avenue West, Toronto, ON, M9W 0A2, CA
Telephone: +1 (416) 745-1021
Price range: $

$450.00

SKU: NA3-560.4

Condition: New

Availability: Usually Ships in 2-3 Days

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Description
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Descriptions

About: MB Quart NA3-560.4 4-Channel Marine Amplifier — 70W RMS x 4

Four channel Nautic waterproof amplifier with marine specific connectors. Top mounted sound contouring with onboard crossovers, bass boost and adjustable input sensitivity all concealed behind top mounted controls.

Audiophile Marine Standards

Nautic amplifiers are not automotive amplifiers. While they will work just fine in a car or truck, however, they are purpose built to very strict standards set forth for marine electronics by the American Society for Testing and Materials, ASTM International™ and NMMA.

NMMA Certified

National Marine Manufacturers Association (NMMA) is a voluntary consortium of global boat manufacturers that set standards for marine products, from boat building to the accessories installed in them. In terms of marine audio amplifiers, NMMA defines the safety requirements which means that your MB Quart marine amplifiers are held to a higher standard that typical audio products for delivering power from the electrical system, through the PC board to the speakers and subwoofers.

Control & Expansion

Sound contouring with onboard crossovers, bass boost and adjustable input sensitivity are all concealed behind top mounted controls. All of this control will allow you or the installer to fine tune the system using a myriad of variable frequency adjustments along with level controls within the EQ range and Bass EQ active at 45Hz while in LP/BP operation.

Nautic amplifiers are available in 4, 5 and a 6 channel configurations so you can drive speakers on the deck or in the cabin and have plenty of power for subwoofer channels. With the MB Quart source units and Bluetooth controllers it is possible to have better audio experience on the water, the solution has always been Nautic from MB Quart.

Specifications:

4-channel marine amplifier
70 watts x 4 at 4 ohms
140 watts x 4 at 2 ohms
280 watts x 2 bridged at 4 ohms

Variable low- and high-pass filters (50-250 Hz, 12 dB/octave)
Variable bass boost (0-9 dB at 45 Hz)
Conformal-coated circuit board
Weather-resistant construction
Preamp and speaker-level inputs
Selectable signal-sensing turn-on with speaker-level input

Wiring, fuse, and hardware not included with amplifier
10-gauge power and ground leads and a 35-amp fuse recommended

Dimensions (W x H x D): 10" x 1-1/2" x 4"

What's in the Box:

4-Channel amplifier
10" Power harness
10" Speaker output harness
Adhesive backed MB Quart logo panel
Four 3/4" Screws
2.5mm Allen wrench
Quick start installation guide
Remote turn-on note
MB Quart logo installation note
Window sticker

Most products include a limited one year manufacturer’s warranty covering defects in materials and workmanship under normal use. Warranty coverage does not apply to improper installation, misuse, or damage caused by operation outside manufacturer specifications. For complete warranty terms, exclusions, and claim procedures, please visit our full Warranty Policy page.

Fast shipping across Canada from our Toronto warehouse. Most orders ship within 1–2 business days. Shipping costs and delivery estimates are calculated at checkout. Returns are accepted on eligible items that are unused and in original packaging within our return period. For full details, please view our Shipping Policy and Returns & Exchanges Policy.

Please note that final sale, clearance, open-box, and refurbished items are not eligible for returns or refunds. These items may only be covered under their respective warranty or exchange terms where applicable. For full details regarding open-box items, please review our Open Box Policy.