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Manual Boston Acoustics GT-28, GT-24

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Summary
  • Boston Acoustics GT-28, GT-24 - page 1

    GT-28 GT-24 2-Channel, High-Curr ent/High-Power Amplifiers ...

  • Boston Acoustics GT-28, GT-24 - page 2

    2 T able 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 r emoval and reinstallation 6 Multi-position mounting feet 6 V ents (side and rear) 6 Mechanical functions (cont.) 7 Amplifier linking 7 Wi re connection 7 Fuses 7 General Insta ...

  • Boston Acoustics GT-28, GT-24 - page 3

    Included Hardwar e: 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 Te chnical Specifications GT -28 GT -24 14.4VDC Power @ 4 Ohms 2x250W 2x175W @ 2 Ohms 2x450W 2x275W @ 4 Ohms (mono) 1x900W 1x55 ...

  • Boston Acoustics GT-28, GT-24 - page 4

    4 12.6–14.4VDC B+ B+ GROUND GND GND FUSE 4 x 25A SPEAKER OUTPUT L R MONO LOWPASS OFF ON HIGHPASS OFF ON 5 0.2 INPUT SENSITIVITY 2.6 50 350 Hz 200 20 350 Hz 185 0.7 1.2 Q/HP 0.95 LOWPASS SLOPE 12dB 24dB MONO 12dB ST INPUT STEREO MONO L SUBWOOFER LEVEL OFF ON REMOTE INP U T SUBWOOFER LEVEL Contr ol Functions RCA Inputs RCA cables from head unit or ...

  • Boston Acoustics GT-28, GT-24 - page 5

    Lowpass Crossover Contr ols To use lowpass crossover move LOWP ASS switch to righthand position. Lowpass crossover fr equency is adjustable from 50Hz to 350Hz by r otary control. (Moving switch to left-hand position will bypass crossover functions.) Lowpass Slope Select appropriate cr ossover slope of 12 or 24dB/octave by moving LOWP ASS SLOPE swit ...

  • Boston Acoustics GT-28, GT-24 - page 6

    6 Mechanical Functions Recessed RCA Inputs The input jacks are r ecessed 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 scr ews. Coin-slot- ted screws allow a coin edge to be used as a scr ewdriver to remove the ...

  • Boston Acoustics GT-28, GT-24 - page 7

    7 Mechanical Functions (cont.) Amplifier Linking The design of the side panels enables multiple amplifiers to be used together without additional hardwar e. Wire Connection Amplifier accepts stripped wire dir ectly into the terminal blocks. Speaker outputs accept 8-gauge, and the DC power and ground accept 4-gauge. Tighten with supplied hex wren ...

  • Boston Acoustics GT-28, GT-24 - page 8

    8 Before Y ou 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-level signals or audio cables such as the RCA ...

  • Boston Acoustics GT-28, GT-24 - page 9

    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! W ARNING! Before driving the mounting scr ews thr ough any surface, be sure of what is behind that sur- face. Check for gas tank, bra ...

  • Boston Acoustics GT-28, GT-24 - page 10

    10 Passenger and T runk Compartment Mounting If the amplifier is mounted under a seat, be sure that the vents do not become blocked. Do not allow seat padding or other obstructive material to press down on the amplifier . All Boston GT amplifiers have top panel controls. If the amplifier is mounted under a seat, position the amplifier so the c ...

  • Boston Acoustics GT-28, GT-24 - page 11

    SPEAKER OUTPUT L R MONO Power/B+ and Power/GND Connection Strip approximately 5 / 8 " (16mm) of insulation. The positive (+) power wir e is installed into the amplifier terminal marked “B+”. The negative (–) wire is installed into the terminal marked “GND”. The ground wir e should be as short as possible and connected directly to th ...

  • Boston Acoustics GT-28, GT-24 - page 12

    12 Mono Subwoofer Operation When the amplifier is configured for mono operation, use the speaker output terminals marked for mono use. W ARNING! 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 system setup must be both clear in recor di ...

  • Boston Acoustics GT-28, GT-24 - page 13

    13 Setup T uning—Full-Range Speakers (cont.) 4) Head Unit The head unit should have all controls such as bass, tr eble, balance, and fader set to the flat or centered position. The volume control should be at the minimum setting. If the head unit has any equalization or bass management features such as boost , they should be defeated at this tim ...

  • Boston Acoustics GT-28, GT-24 - page 14

    14 8) “Q” Control Once the highpass crossover point has been determined, use the “Q” con- trol to incr ease the bass information centered ar ound the crossover point. Setting the “Q” control is done in conjunction with setting the levels on the input sensitivity and highpass crossover fr equency controls. Y ou may find while setting th ...

  • Boston Acoustics GT-28, GT-24 - page 15

    15 4) Input Sensitivity Control Tu rn 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 r otate this control clockwise until maximum undistorted playing level is heard fr om the subwoofer(s). Listen closely for faults such as bottoming fr ...

  • Boston Acoustics GT-28, GT-24 - page 16

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

  • Boston Acoustics GT-28, GT-24 - page 17

    17 System Examples (cont.) System C—Parallel 4 Ω Subwoofers (2 Ω load) System D —Series/Parallel 2 Ω Subwoofers (2 Ω load) 10.5LF 4 Ω 10.5LF 4 Ω fuse to + battery terminal to ground to gr ound fuse to + battery terminal fuse to + battery terminal to gr ound to gr ound fuse to + battery terminal 10.5LF 2 Ω 10.5LF 2 Ω 10.5LF 2 Ω ...

  • Boston Acoustics GT-28, GT-24 - page 18

    18 Amplifier T r oubleshooting Guide Status LEDs on Amplifier not Lit — Head Unit (Sour ce) T urned “ON” V erify Remote turn-on wire fr om source to amplifier has pr oper voltage Power (B+) connections at amplifier , terminal blocks, and battery are secure Ground (GND) connections at amplifier and vehicle chassis ar e secure Battery B+ f ...

  • Boston Acoustics GT-28, GT-24 - page 19

    19 Contact and W arranty Information 300 J ubilee Drive Pe a b o d y, MA 0 1 960 U.S.A. (978) 538-5000 Boston, Boston Acoustics, and the Boston logo are r egister ed trademarks of Boston Acoustics, Inc. © 2003 Boston Acoustics, Inc. All rights reserved. Specifications subject to change without notice. P/N 042-1801-0 www .bostonacoustics.com Limit ...

Manufacturer Boston Acoustics Category Stereo Amplifier

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A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Boston Acoustics GT-28, GT-24 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Boston Acoustics GT-28, GT-24.

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