8
AMPLIFIER INSTALLATION
This section covers general wiring and the installation the NA2-400.2 amplifier using the optional MBQX-
SUB-ACC-1 mounting plate. If not using this mounting plate, you’ll need to determine your own mounting
location.
AMPLIFIER INSTALLATION
4
Attach the 400.2 amplifier to
mounting plate with included
hardware as indicated. Use
only three nuts/bolts due to
chassis tube frame clearance.
7
Place amplifier & plate into its
location. Attach the supplied
Phillips screws and 7/16” nuts
through the clamp holes and
tighten until amplifier is secure.
8
9
Connect the RCA audio cable
fron source unit to left and right
channel amplifier inputs. Be
sure to double check left is left
and right is right (channel).
Connect the 4-pin speaker
and 3-pin power wire harness
connectors as shown. Zip tie
wiring to void any moving parts,
moisture or heat sources.
No
Nut/
Bolt
Here
5
Make (or verify) recommended
amplifier LEVEL and HP
crossover settings as indicated.
See page 11 for setting details.
400.2
● XOVER SWITCH - High Pass (HP)
● LEVEL DIAL - Depends on source unit used
● HP DIAL - Approximately 80Hz (Safe Setting)
● LP DIAL - Unused in this application
2
3
Route speaker wiring from
each front speaker location
to the amplifier’s installation
location. Connect wires to 4-pin
speaker plug as shown.
Route left/right preamp-level
RCA audio cables and remote
turn-on wire from source
unit preamp outputs to the
amplifier’s installation location.
Route power+ground amplifier
wiring to the amplifier’s
installation location. Including
remote turn-on, connect wires
to 3-pin power plug as shown.
1
Source Unit
“FRONT OUTPUTS”
To Amplifier
Location
6
Route power, speaker wiring
and RCA audio cables to amp
mounting location (near frame
tubes). Place mounting clamps
in initial locations as shown.
Frame
Tube
Mounting
Clamps
4-Pin Speaker Plug
3-Pin Power Plug
Audio input signal voltage from
source unit must not exceed 9VAC
