Boston Acoustics GT-424-Channel manual Mechanical Functions

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Control Functions (cont.)

12 Subwoofer Level Control and Port

Switch should be set to “OFF” when control circuit is not installed, (see optional “subwoofer level control” owner’s manual).

cover panel

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 and 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 and 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 Ampliﬁer GT-42Table of Contents Parts List Features and SpeciﬁcationsControl Functions Control Rear Input SwitchStatus LED Indicators Rear RCA InputsMechanical Functions Wire Connection Ampliﬁer LinkingFuses Battery and Charging System General Installation PrecautionsBefore You Install Wire RoutingInstallation-Ampliﬁer Mounting Choose the Mounting LocationPassenger and Trunk Compartment Mounting Installation-Fuses and WiringWire Gauge Ampliﬁer FusesPower/B+ and Power/GND Connection Remote Input ConnectionSpeaker Output Connection Setup Tuning-Full-Range Speakers Front Input Sensitivity Control VolumeHead Unit Front Crossover ControlsSubwoofer Level Control Rear Input Switch Setup Tuning-Rear Fill SpeakersSetup Tuning-Subwoofers Front Q ControlRear Input Sensitivity Control Rear Crossover ControlSystem Examples System A-Full-Range Front with Full-Range RearSystem B-Full-Range Front with Rear Fill System C-Main Speakers with Single Subwoofer 2Ω System D -Main Speakers with 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