Boston GTA-502 Manual Download Page 4

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WARNING! 

Before driving the amplifier mounting screws through any surface,

be sure of what is behind that surface. Check for the gas tank, brake lines, and
any vehicle wiring harness. Never run wires outside or under the vehicle or
where they could become broken or interfere with the safe operation of the
vehicle.

Before You Install

Before you install the unit, disconnect the negative (–) battery cable in the
engine compartment of the vehicle. Doing so will prevent damage to both the
electrical system of the vehicle and the amplifier during installation.

Battery and Charging System

In order for the amplifier to function correctly, the electrical system of the 
vehicle should be professionally checked for overall electrical capacity. When
used, the amplifier will increase the demand on the battery and alternator.
Therefore, both should be thoroughly evaluated before installing the amplifier
to ensure they are in normal operating condition and able to handle the
increased demand the amplifier will present to the vehicle’s electrical system.

Wire Routing

Do not run the power wire near any low-level signals or audio cables such as
the RCAs from the head unit. Noise can be introduced into the amplifier when
this occurs. It is helpful to diagram the wire layout first before any installation 
is initiated.

Choose the Mounting Location

Plan your installation so that the amplifier is mounted where adequate 
ventilation is available. 

Never mount an amplifier in the engine compartment

of a vehicle!

Passenger and Trunk Compartment Mounting

If the amplifier is mounted under a seat, be sure that there is adequate space
around the amplifier once installed, 1” (25mm) recommended minimum. Do not
allow seat padding or other obstructive material to press down on the amplifier. 

When mounting in a trunk, choose a location that will be protected from sliding
cargo or other materials. Mount the amplifier to solid surfaces only. Do not
mount to plastic trim panels. Do not mount the amplifier with Velcro, double-stick
tape, or by wedging into position. Amplifier should be mounted using the screw
mounts in the endpanels and with the provided mounting screws.

Cooling

Position the amplifier so that there is adequate space around the amplifier once
installed, 1” (25mm) recommended minimum. 

Installation - General

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Summary of Contents for GTA-502

Page 1: ...High Performance Two and Four Channel Amplifiers GTA Downloaded from http nothickmanuals info...

Page 2: ...10Hz 50kHz 10Hz 50kHz 10Hz 50kHz Signal to Noise Ratio 90dB 90dB 90dB A Weighted THD N 0 05 0 05 0 05 Highpass Crossover Frequency Range 50Hz 200Hz 50Hz 200Hz 50Hz 200Hz Slope dB Per Octave 12dB 12dB...

Page 3: ...tatus 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...

Page 4: ...Do not run the power wire near any low level signals or audio cables such as the RCAs from the head unit Noise can be introduced into the amplifier when this occurs It is helpful to diagram the wire...

Page 5: ...the power wire must be routed through a drilled or existing hole use a nylon panel grommet to prevent the insulation from fraying Failure to do so could lead to an electrical short if the wire insulat...

Page 6: ...peaker outputs If over excursion is detected from speakers move the switch to HP and slowly rotate clockwise until over excursion is eliminated 4 Head Unit The head unit should have all controls such...

Page 7: ...ver point is now set at 200Hz Q Tune should be set to off Slowly rotate the input sensitivity control clockwise until maximum undistorted playing level is heard from the speakers Listen closely for bo...

Page 8: ...ts this will be at the end of the volume control range WARNING A distorted signal from the head unit sent to the amplifier can cause speaker failure at higher listening levels 3 Input Sensitivity Cont...

Page 9: ...may choose to use Q Tune to increase the bass information Q Tune will offer a 6dB bass boost centered at 45Hz which can be beneficial if more low bass output is desired To engage Q Tune move the sele...

Page 10: ...d signal from the head unit sent to the amplifier can cause speaker failure at higher listening levels 3 Input Sensitivity Control Gain Turn control refer to the diagram on page 3 all the way counterc...

Page 11: ...In this setting lowpass signal is sent to the speaker outputs Experiment with the crossover point settings while the subwoofer is active A higher setting will increase the perceived output and a lower...

Page 12: ...Thermal Protection Mode Verify Amplifier is mounted with adequate space around heatsink Amplifier is not mounted under carpet Speakers meet correct impedance for application mono or stereo hookup Amp...

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