Boston acoustics GT-28, GT-24 Manual

Page 2 - Table of Contents

2 Table of Contents Parts List 3 Features and Specifications 3 Control Functions 4 Control functions (cont.) 5 Mechanical Functions 6 Recessed RCA inputs 6 Control cover removal and reinstallation 6 Multi-position mounting feet 6 Vents (side and rear) 6 Mechanical functions (cont.) 7 Amplifier linki...

Page 3 - Parts List; Technical Specifications; Features and Specifications

Included Hardware: GT-28 & GT-24 (1) owner’s manual (1) female quick-connect terminal for remote input (1) 2mm hex wrench (for speaker input) (1) 3mm hex wrench (for power input) (6) mounting screws 3 Parts List Technical Specifications GT-28 GT-24 14.4VDC Power @ 4 Ohms 2x250W 2x175W @ 2 Ohms 2...

Page 4 - Control Functions; RCA Inputs

4 1 2 . 6 – 1 4 . 4 V D C B + B + G R O U N D G N D G N D F U S E 4 x 2 5 A S P E A K E R O U T P U T L R M O N O L O W PA S S O F F O N H I G H PA S S O F F O N 5 0 . 2 I N P U T S E N S I T I V I T Y 2 . 6 5 0 3 5 0 H z 2 0 0 2 0 3 5 0 H z 1 8 5 0 . 7 1 . 2 Q / H P 0 . 9 5 L O W PA S S S L O P E 1...

Page 6 - Mechanical Functions; Recessed RCA Inputs; Before driving the mounting screws through any surface, be sure; upper side vent

6 Mechanical Functions Recessed RCA Inputs The input jacks are recessed into the body of the amplifier to provide clear-ance in tight mounting locations. Control Cover Removal and Reinstallation The cover panel is secured with two (2) captive coin-slotted screws. Coin-slot-ted screws allow a coin ed...

Page 7 - Amplifier accepts standard AT-style automotive blade fuses.

7 Mechanical Functions (cont.) Amplifier Linking The design of the side panels enables multiple amplifiers to be used together without additional hardware. Wire Connection Amplifier accepts stripped wire directly into the terminal blocks. Speaker outputs accept 8-gauge, and theDC power and ground ac...

Page 8 - General Installation Precautions

8 Before You Install Before you install the unit, disconnect the negative (–) battery cable in the engine compartment of the vehi-cle. Doing so will prevent damage to both the electrical system of the vehicle and the amplifier during installation. Wire Routing Do not run the power wire near any low-...

Page 9 - Choose the Mounting Location; Never mount an amplifier in the engine compartment of a vehicle!; Installation—Amplifier Mounting; GT

9 57mm (2 1 / 2 ") 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! WARNING! Before driving the mounting screws through any surface, be sure of what is be...

Page 10 - Passenger and Trunk Compartment Mounting; Installation—Fuses and Wiring; Amplifier Fuses

10 Passenger and Trunk Compartment Mounting If the amplifier is mounted under a seat, be sure that the vents do not becomeblocked. Do not allow seat padding or other obstructive material to pressdown on the amplifier. All Boston GT amplifiers have top panel controls. If the amplifier is mountedunder...

Page 11 - Strip approximately; Remote Input Connection; Prepare each wire by stripping approximately

S P E A K E R O U T P U T L R M O N O Power/B+ and Power/GND Connection Strip approximately 5 / 8 " (16mm) of insulation. The positive (+) power wire is installed into the amplifier terminal marked “B+”. The negative (–) wireis installed into the terminal marked “GND”. The ground wire should bea...

Page 12 - Mono Subwoofer Operation; Subwoofer impedance must not fall below 2 ohms when in MONO mode.; ) Input Sensitivity Control; Setup Tuning—Full-range Speakers; Highpass Crossover Control; Lowpass Slope Control

12 Mono Subwoofer Operation When the amplifier is configured for mono operation, use the speaker output terminals marked formono use. WARNING! Subwoofer impedance must not fall below 2 ohms when in MONO mode. Installation—Fuses and Wiring (cont.) 1) Music The material chosen for head unit/amplifier ...

Page 13 - ) Input Sensitivity Control; ) Crossover Controls

13 Setup Tuning—Full-Range Speakers (cont.) 4) Head Unit The head unit should have all controls such as bass, treble, balance, and fader set to the flat or centeredposition. The volume control should be at the minimum setting. If the head unit has any equalization or bassmanagement features such as ...

Page 15 - boost

15 4) Input Sensitivity Control Turn control all the way counterclockwise (minimum position). In this position, the amplifier will be less sen-sitive to the input signal from the head unit. Slowly rotate this control clockwise until maximum undistortedplaying level is heard from the subwoofer(s). Li...

Page 16 - System Examples; System A—Full-Range Front Speakers

16 System Examples System A—Full-Range Front Speakers 6 .5 L F 6 .5 L F fuse to + battery terminal to ground to ground fuse to + battery terminal System B—Rear Fill Speakers fuse to + battery terminal to ground to ground fuse to + battery terminal 6 .5 L F 6 .5 L F

Page 18 - Amplifier Troubleshooting Guide; Amplifier not Turning “ON”, Red LED Lit

18 Amplifier Troubleshooting Guide Status LEDs on Amplifier not Lit — Head Unit (Source) Turned “ON” Verify Remote turn-on wire from source to amplifier has proper voltagePower (B+) connections at amplifier, terminal blocks, and battery are secureGround (GND) connections at amplifier and vehicle cha...

Page 19 - Contact and Warranty Information; Jubilee Drive; If Service Seems Necessary

19 Contact and Warranty Information 300 Jubilee Drive Peabody, MA 01960 U.S.A. (978) 538-5000 Boston, Boston Acoustics, and the Boston logo areregistered trademarks of Boston Acoustics, Inc. © 2003 Boston Acoustics, Inc. All rights reserved.Specifications subject to change without notice. P/N 042-18...