Boston Acoustics GTA 1105, Installation Manual

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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 10. 

u

RCA Input (Left and Right)Speaker Level Input

v

Speaker Level Input

w

Crosssover Filter Switch (HP / Off / LP)

x

Gain (250mv to 5.0v - continuously variable)

y

Crossover Frequency Adjustment (50Hz to 200Hz - continuously variable)

z

Q-Tune

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“Q” Adjustment (0.707 to 1.6 - cont. variable)

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Lowpass Crossover Adjustment (50Hz to 150Hz - cont. variable))

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Q-Tune

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Highpass (Subsonic) Adjustment (10Hz to 50Hz - cont. variable)

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GTA-RSL Port (Remote Gain)

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Speaker Output Block (Front and Rear Speakers)
Speaker Output Block (Subwoofer)
Status LED (Blue = Normal / Red = Fault Mode)

Fuses (Replace with same value only, refer to specifications on page 2)

Power Block (12v / Remote / Ground)

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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.