C
o
n
n
e
c
tio
n
s
/
C
o
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tr
o
ls
3
Status LED
The Boston Logo will illuminate “Blue” under normal operating conditions.
The LED will illuminate “Red” during start-up and under fault conditions. If the
LED is still red after start-up, please refer to troubleshooting on page 12.
u
Speaker Level Input
v
RCA Input (Left and Right)
w
Gain (250mv to 5.0v - continuously variable)
x
Crossover Frequency Adjustment (50Hz to 200Hz - continuously variable)
y
Q-Tune
™
Equalization Boost (+6dB @ 45Hz)
z
Crosssover Filter Switch (HP / Off / LP)
{
GTA-RSL Port (Remote Gain)
|
Speaker Output Block (Left / Right) or (LF / RF / LR / RR on GTA-504)
}
Status LED (Blue = Normal / Red = Fault Mode)
~
Fuse (Replace with same value only, refer to specifications on page 2)
Power Block (12v / Remote / Ground)
13 14 15
3
5
1
4
8
9
10
11
7
2
6
3
5
1
4
8
9
10
11
7
2
6
3
5
1
4
3
4
8
9
10
11
7
2
1
2
6
6
GTA-502
GTA-802
GTA-504
Connections and Controls
Speaker Level Input Cable
GTA amplifiers offer a dedicated speaker level input for ease installation into
factory systems when an RCA (low level) signal is not available. Wiring code for
the cable is industry standard;
White Solid = Left Positive White w/ Black Stripe = Left Negative
Gray Solid = Right Positive Gray w/ Black Stripe = Right Negative
Warning: Do not connect both Speaker Level and RCAs into the amplifier at the
same time as damage to the amplifier may occur.