fan
speed
+ - + - + - + - + -
fan
INSTALLER’S REFERENCE
. . . . . . . . . . .
XTANT 403A
. . . . . . . . . . . .
remove amplifier cover
Do not remove protective covering until installation is complete.
temporarily mount amplifier
The amplifier is designed to be anchored through the four holes located on the circuit
board/base assembly.
mark wires for termination
Determine wire lengths for Power, Ground, Remote, & Speaker cables. Mark for
cutting/termination. Remove
403a
. Cut and terminate all wires.
CAUTION:
Stripping wires over the circuit board may cause product failure.
balanced inputs
Make all initial adjustments at your work bench. To select “Balanced Input” for
OEM
integration or inductive noise cancellation, move the two jumpers, located above and
to the left of the
RCA
input connectors to the “enable” position.
input gain
The input gain is factory preset at
+
10
dB
and will work with an input signal of
300mV
to
1 Volt
. To increase the gain, move the jumper to the
+
20
dB
position. To
decrease input gain, place jumper in the
0
,
-10
, or
-20
dB
position.
install accessory modules
At your bench, adjust crossover mode jumpers and change crossover frequency SIP’s .
Remove port jumpers and install module(s) – observe “key” on connector for proper fit.
Adjust
PQM-1
or
LFQ 45 EQ
modules after amp is mounted.
mount the amplifier and connect
speakers
Two pairs of speaker terminals are provided. The attenuation function of the termi-
nals labeled “passive” is only activated when Xtant’s “passive attenuation boards” –
RM 4, RM 8, RM 12 or RM 16
are installed.
Channel input mode jumper
Both front and rear inputs must be used when the amplifier is in the 4 channel mode.
only front inputs need be used when you select 2 channel mode on the 2/4 channel
jumper.
make remaining connections
Double check all connections! Turn on amplifier. Check red led, it should be on. If any
other adjustments need to be made (crossover modules/input gain adjustment)
thE Service jumper may be used to turn the amp off. Make adjustments and place
jumper in the enable position to turn the amp back on.
adjust output gain to set system level.
after fine tuning the system,
remove protective
covering and spray a light coating of
WD40™
on a soft cloth and clean cover.
5
8
7
4
1
2
3
XTANT TECHNOLOGIES
7676 SOUTH 46TH STREET PHOENIX, ARIZONA 85040 PHONE: 888.449.8268 FAX 602.431.8600
amplifier gain controls:
TURN CLOCKWISE TO INCREASE GAIN
Amplifier Accessory Ports
1
2
3
4
5
7
8
CAUTION:
T
HE
403
A IS
NOT
FUSE PROTECTED
!
FOR SAFTEY
,
AN OUTBOARD
60
AMP FUSE MAY BE ADDED CLOSE TO THE AMPLIFIER
.
A
60
AMP FUSE
MUST
BE INSTALLED IN
-
LINE
WITH THE POWER WIRE AT THE BATTER
y
.
Caution: SHARP EDGES
be careful when
handling top and
bottom metal.
Speaker output terminals:
THE
403A
FEATURES TWO PAIRS OF SPEAKER TERMINALS. THE ATTENUATION FUNCTION OF
THE TERMINALS LABELED “PASSIVE” IS ACTIVATED WHEN XTANT’S PASSIVE ATTENUATION
BOARDS -
RM4, RM8, RM12
OR
RM16
ARE INSTALLED. THE AMOUNT OF SERIES RESIS-
TANCE ADDED WILL REDUCE THE LEVEL OF THE SPEAKER SYSTEM (ATTACHED TO THE “PAS-
SIVE TERMINALS”) BY
-4, -8,-12
OR
16 db.
6
2/4 Channel
Jumper
6
