Boston Acoustics GT-20 GT-222 manual Mechanical Functions

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Mechanical Functions

Recessed RCA Inputs

The input jacks are recessed into the body of the amplifier to provide clear- ance in tight mounting locations.

1 inch1 inch

Control Cover Removal & Reinstallation

The cover panel is secured with two (2) captive coin-slotted screws. Coin-slotted screws allow a coin edge to be used as a screwdriver to remove the panel.

Multi-position Mounting Feet

The mounting feet are designed to slide in both directions to clear installation obstructions on the mounting surface.

WARNING! Before driving the mounting screws through any surface, be sure of what is behind that surface. Check for the gas tank, brake lines, and any vehi- cle wiring harness.

Vents (Side & Rear)

The cooling vents must be kept clear of obstructions once the amplifier is installed. Failure to do this could lead to premature thermal shutdown or amplifier failure.

upper side vent lower side vent

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Contents Channel, High-Current/High-Power Amplifiers GT-20 GT-22Table of Contents Parts List Features and SpecificationsControl Functions Status LED Indicators Lowpass Crossover ControlsControl Mechanical Functions Wire Connection Amplifier LinkingFuses Battery & Charging System General Installation PrecautionsBefore You Install Wire RoutingInstallation-Amplifier Mounting Choose the Mounting LocationPassenger & Trunk Compartment Mounting Installation-Fuses & WiringWire Gauge Amplifier FusesPower/B+ & Power/GND Connection Remote Input ConnectionSpeaker Output Connection Music Setup Tuning-Full-range SpeakersMono Subwoofer Operation Highpass & Lowpass Crossover ControlsVolume Head UnitCrossover Controls Setup Tuning-Rear Fill Speakers Setup Tuning-SubwoofersPhase Lowpass Crossover ControlSystem Examples System A-Full-range Front SpeakersSystem B-Rear Fill Speakers System C-Single Subwoofer 2Ω System D -Parallel 4Ω Subwoofers 2Ω loadAmplifier Troubleshooting Guide Status LEDs on Amplifier not Lit-Head Unit Source Turned onEngine Noise from Speakers Contact and Warranty Information Limited Warranty USIf Service Seems Necessary