Nautic
Installation Manual
NAUTIC
NA180.2 / NA360.4 / NA710.5 / NA540.6
MB Quart has an incredible Marine amplifier lineup with 2, 4, 5 and 6 channel models
available. All NA models feature the following:
- American Boat and Yacht Council compliant Power and Speaker terminals.
- Gold plated Power and Speaker terminals.
- Marine Grade Conformal Coated circuit board to resist corrosion from salt
spray and moisture.
- Non-Corrosive Aluminum extrusion.
- UV and salt spray resistant silk screen and paint.
Congratulations!
By purchasing an amplifier from MB Quart, you have decided on a product of the highest
technical quality. MB Quart wishes you great enjoyment with your amplifier. Should you
have any questions about this system or other MB Quart products, please email us at
info@maxxsonics.com
Index
1
2
3
4
6
5
7
8
9
WARRANTY
TROUBLE SHOOTING
NA360.4 4-Channel Amplifiers
NA180.2 2-Channel Amplifiers
NA710.5 5-Channel Amplifiers
NA540.6 6-Channel Amplifiers
TECHNICAL DATA
INSTALLATION INSTRUCTIONS
General Instructions
Settings for Best Performance
1
WARRANTY
1
FOR EXTENDED WARRANTY INFORMATION, PLEASE VISIT
WWW.MAXXWARRANTY.COM
General Instructions
INSTALLATION INSTRUCTIONS
2
General:
Run the wiring so that RCA cables are at least 18“ away from power and speaker cables. Keep RCA cables away from electrical devices in the vehicle
that can cause electrical noise, such as electric fuel pumps, emission control modules and other on-board electronic modules.
Power and ground connections:(See table below)
Use a sufficient gauge power cable and ground cable using the chart below as reference to what size wire you require. NAUTIC series amplifiers
require at least 4 gauge power wire. In a multi amplifier system, add the total value of the manufacture recommended fusing to get your total system
amperage. Some applications may require multiple runs of power wire to meet the system requirements. In multi amplifier systems it is advisable to
mount a large enough fuse right at the battery, and run one or multiple +12 volt power cables to a fused distribution block near the amplifiers. It is then
a simple matter to connect the +12 volt terminal of each amplifier to the distribution block. During this process, please ensure that the main power fuse
is removed to avoid shorting the electrical system. The main fuse must be within 12” of the vehicles battery.
Ground each amplifier with as short a ground lead as possible directly to the vehicle chassis using at least 4 gauge wire or equivalent to the size of the
amplifiers’ power wire. Use a ground distribution block, if you wish, but it is extremely important to keep the main ground lead from this distribution
block to the chassis as short as possible , not more than 12“. The ground connection integrity to the chassis is very important, and the best way to
achieve a good, solid electrical and mechanical contact is to use a large round crimp lug, crimped and soldered to the ground cable. The next step is to
scrape the paint off the vehicle chassis , slightly larger than the ground lug, at the connection point. Drill a clearance hole in the chassis, the same size
as the lug hole, and use a bolt, spring washer and nut to securely fasten the ground lug. Use petroleum jelly to coat the bolt/lug connection, to prevent
oxidization with time.
TIP: Use the same approach when installing head units, equalizers or any audio equipment for that matter - run short individual grounds from each
piece directly to the vehicle chassis, to minimize ground loops and system noise. All power, ground and speaker connections should be crimped and
soldered for reliability. Make sure that none of the cable insulation can chafe against exposed metal in the vehicle, causing short circuits to the
chassis.
Safe connection sequence:
After all cables are run, connect speaker wires to the speakers and amplifiers, then run and plug in RCA cables. Next, connect all power, ground, and
remote turn on leads. Now connect all +12 volt cables to the amplifier/s and distribution blocks and fuse holders. Finally, connect the main +12 volt
cable to the battery, with the main fuse removed, and we are almost ready to power up the system.
Power up the system:
The following procedure may seem like overkill, but there is nothing more frustrating when turning on a system for the first time, and it does not work
properly immediately.
First, make sure the head unit is off, and turn all level controls to minimum (counterclockwise), including the head unit volume control. Set all equalizers
to 0 dB (no boost), and all crossover frequency controls at approximate frequencies, as recommended by the loudspeaker manufacturer. Set all input
selector and crossover switches as required for the application. Remove all amplifier fuses, and insert the main fuse at the battery. If the fuse does not
blow, you can insert the fuse in one of the amplifiers, and we are ready to turn on the system. Turn the head unit on, insert a CD, or select a radio
station, and increase the head unit volume control. If the system sounds fine, turn off the head unit, and install fuses in the remaining amplifiers, one by
one, till the complete system is powered up and functioning properly.
7-10 ft. 10-13 ft. 13-16 ft.
16-19 ft. 19-22 ft. 22-28 ft.
SYSTEM
AMPERAGE
35-50
50-65
68-85
85-105
105-125
125-150
8
6
4
4
4
2
6
4
4
2
2
0
4
4
2
2
0
0
4
4
2
2
0
0
4
4
2
2
0
0
4
2
0
0
0
0
WIRE LENGTH
WIRE GAUGE
Settings for Best Performance
INSTALLATION INSTRUCTIONS
3
NA180.2 / NA360.4 / NA710.5 / NA540.6
General:
At this point you are ready to get more specific on the settings for your amplifier.
Filter Adjustments (Crossover)
High:
-When in High Pass operation, this setting acts as a low frequency cut off for your system reproduction. The point that you set it at cuts off any
frequencies from reproduction beyond this point. The 12 o’clock position is a great starting point. EXAMPLE: If you adjust the Frequency to 100Hz,
the amplifier will not play frequencies below 100Hz but will play frequencies from 100Hz to the highest frequency the amplifier is capable of
reproducing.
Low:
The Low Pass adjustment acts as a ceiling and doesn’t allow frequencies to the right of the desired setting to be reproduced. Turning the Frequency
all the way to the right is a great starting point. EXAMPLE: If you adjust the Frequency to 120Hz, the amplifier will not play frequencies above 120Hz
but will play frequencies from 120Hz to the lowest frequency your amplifier can reproduce.
Flat:
The Flat adjustment bypasses the crossover and allows all frequencies to be sent from the amplifier to your speakers and subwoofers.
Bass EQ:
This setting is a fixed bass boost at 45Hz that is variable. NA710.5 is 0-10dB on the 5th channel while the NA180.2/NA360.4/NA540.6 are 0-9dB.
This feature provides impact to your bass, but if not adjusted correctly, it can be over used and cause damage to your speakers and amplifiers. It is
best to slowly turn this setting clockwise until the desired punch is felt. It is not recommended to exceed the 12 o’clock position unless listening at a
low volume or a low recording quality as this can result in high distortion and possibly clipping.
Level Control Setup:
Ensure that the Level is turned completely to the left prior to turning the system on. Next you should insert a CD or cassette that you are familiar with
to use as a reference, and turn the head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and
the following procedures will help you to match the amplifier input sensitivities properly to the head unit output signal level.
It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual.
If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts.
If you are not sure what the Radio output sensitivity is, follow these general guide lines:
Turn the level control up slowly, till you hear distortion, then back off a few degrees on the control. If at any point your amplifier goes into protection,
you will need to turn the Level to the left a bit and then try again. If you reach a point where the output does not increase, stop turning the Level
control to the right as the amplifier/speaker combo has reached its maxx output in this application.
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