Place terminal in a secure
position so that it won’t
accidentally contact the
negative battery post
For power cable runs over 20 feet,
8ga is recommended.
Power cable size
and fusing
It is critical to use the proper power
and ground cable. Select the size
listed here for your amplifi er model.
Always use high quality copper
cable. Visit our website for multi amp
system cable recommendations.
Be sure to use the proper fuse size
for each model. Some models require
an external fuse.
Properly route power,
speaker and RCA cables
through the vehicle.
Choose a mounting location
that will provide adequate air
ventilation. Mount the amplifi er to
a secure surface. Do not mount
the amplifi er upside down.
Attach the chassis ground, +12V and remote wire.
It is important to make sure these connections are
very secure.
Bare metal
Connect the RCA cables to
the INPUT connectors. The
OUTPUT can be used to
provide input for a second
amplifi er.
Connect the power cable to the
positive battery terminal. The
power cable must be fused
within 18 inches of the battery
terminal.
Re-connect the negative
battery terminal making sure it
is securely tightened.
Connect the speaker cables to
the speaker output connectors.
Follow the diagram below
that best fi ts your speaker
confi guration.
The chassis ground connection
is critical to the performance
of the amplifi er. Choose a
location that is close to the
amplifi er. Completely scrape
away the paint and use a nut
and bolt if possible.
DO NOT USE AN EXISTING
FACTORY BOLT!
Disconnect
Negative Battery
Terminal
Run Cables
Mount Amplifi er
Power
Connection
Signal Input
Connection
Positive Battery
Connection
Re-connect
Negative Battery
Terminal
Speaker
Connections
Chassis Ground
Be prepared to disarm your vehicle’s alarm and
to enter your radio / source unit code.
Installation
Before you start
CAUTION
Many new and factory radios require a reset code when
disconnected from battery power. This is an anti-theft
feature. Before unplugging power, you must determine if
your radio/source unit requires a reset code. Check the
operation manual for your vehicle or contact the dealer.
1
2
3
5
6
9
10
8
4
Turn the GAIN control completely
counter-clockwise to minimum.
Gain Control
7
10ga
Model Fuse Size Cable Size
NA1-400.2
NA1-320.4
NA1-400.1
1-20A atc
1-20A atc
1-25A atc
Ground - Black
Remote - Blue
+12V - Red
Speaker Positive - Gray
Left Positive - White
Left Negative - White / Black
Left Front Positive - White
Left Front Negative - White / Black
Right Positive - Gray
Right Negative - Gray / Black
Right Front Positive - Gray
Right Front Negative - Gray / Black
Left Rear Positive - Green
Left Rear Negative - Green / Black
Right Rear Positive - Purple
Right Rear Negative - Purple / Black
Speaker Negative - Gray / Black
GAIN
MIN
MAX
NA1-400.1
NA1-400.2
NA1-320.4
