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MB Quart NA540.6

540W RMS 6-Channel Nautical Series Class SQ Marine Amplifier

MB Quart
Shop all MB Quart
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• 60W x 6 Chan. @ 4 ohms
• 90W x 6 Chan. @ 2 ohms
• 180W x 3 Chan. @ 4 ohms
• 3-Way System Protection
• 6/5/4/3/2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• 3-Way Protection Circuitry

Learn more about the na5406

We apologize

This item has been discontinued

Description


MB Quart brand icon

Authorized dealer

General Features:

  • Nautical Series 6-Channel Class SQ Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 60 watts x 6 chan.
    • 2 ohms: 90 watts x 6 chan.
    • Bridged, 4 ohms: 180 watts x 3 chan.
  • Pulse Width Modulated MOSFET power supply
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (0 to +9 dB bass boost at 45 Hz)
  • Soft start turn-on
  • 6/5/4/3/2 or Mono channel operation
  • Preamp RCA outputs to daisy chain multiple amps
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heat-sink
  • Input sensitivity:
    • Level: 200mV-6V
  • Variable high-pass filter (250-4000 Hz)
  • Variable low-pass filter (40-250 Hz)
  • 4 gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier.
  • Dimensions: 9-1/2"W x 17"L x 2-1/4"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product history:

MB Quart NA540.6 thumbnail
(newest, current model)
(previous model, replaced by MB Quart NA540.6)

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
60 watts x 6 channel
RMS Power @ 2 ohms
90 watts x 6 channel
Bridged RMS Power
180 watts x 3 channel
Amplifier Specifications
Amplifier Class
SQ
Number of Channels
6-Channel
Total RMS Power Output
540 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
0.05%
Speaker Level Inputs
No
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
250 - 4000 Hz
Low-Pass Crossover Frequency
40 - 250 Hz
Signal-to-Noise Ratio
93 dB
Channel Separation
80 dB
Bass Boost
0 - 9 dB
Remote bass/level controller
No
Fuse Rating
70A x 1 
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

NA540.6

Weight:

12.50lbs

Internal SKU:

na5406

Internal Product ID:

69265

Customer Ratings & Reviews



5 star
89%
4 star
0%
3 star
0%
2 star
11%
1 star
0%



Durability
4.9
Value
4.9
Features
4.5
Design
5
Usability
4.8

Customer Reviews

Sort by:

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awesome amp

very easy to hook up, I am running 4 Rockford fosgate 6.5 and 2 infinity 6x9 off this amp. they sound amazing. this amp has enough power and you will not be disappointed if you make this your next purchase

By 10secgoat on April 12, 2014

66

found this helpful.

unbelievable

I got this amp about a month ago and I just hooked it up. I'm running 4 crescendo pro audio mid-bass speakers wired @ 4 ohm they sound incredible on this amp. I would recommend this amp to everyone who loves loud efficient and quality sound.

By blade on July 6, 2014

65

found this helpful.

MB Quart Nautic: Very Good Marine Amp

First of all, Sonic Electronix gave me a great amp for an unbeatable price. I put the MB Quart NA540.6 in my boat and it pushes everything with more than enough power. I'm running the Kicker 41KMS674C component tower system, which SCREAMS, four Kicker 41KM654LCW speakers, and one Kicker 41KMW104LC sub (bridged). The amp runs everything with loud, crystal clear sound. I highly recommend this amp, with it's 6 channels it is very versatile and has ample power.

By Robby D on June 12, 2014

65

found this helpful.

sad

MB QUART is not the same anymore.

this is a nice looking amp with poor performance

By cano on June 5, 2015

25

found this helpful.

Great service

product was shipped quickly and arrived when it was supposed to. Amp was priced excellent.

By Toddster on June 15, 2015

19

found this helpful.

great value great product

No problems. Great amp. The amp came on time an it was new in the box like des said.

By raymond mcc on October 13, 2015

5

found this helpful.

Good Marine Amp

good amplifier for this price, The amp came on time an it was new in the box like des said.

By aleksandr on May 14, 2016 Checkmark Icon Verified purchase

2

found this helpful.

Not going to find a cheaper 6 channel amp of this quality

This is probably the cheapest 6 channel amp that has such good quality to it. It really pushes out power too. I have had no issues with this amp and would definitely recommend it to anyone who needs 6 channels of amplification in their boat or car.

By Jaeden on November 22, 2016

1

found this helpful.

Great amp

Great sounding amp that pushes 8 6.5 MB quart 116 with ease and sounds great

By Toad on June 21, 2016

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