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Boston Acoustics GT-475 manual

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Table of contents for the manual

  • Page 1

    4- Channel Amplier O wners Manual GT -475 GT -4100[...]

  • Page 2

    T able Of Contents 2 2 T able of Contents Parts list 3 Specifications Connections 4 T op panel removal / installation Controls 5 Status LEDs Installation - General 6 Before you install Battery and charging system Wire routing Mounting location Passenger & trunk compartment mounting Multi-Position Mounting Feet V enting Installation - Wiring 7 A[...]

  • Page 3

    Par ts And Specifications 3 Included Hardware: GT -475 GT -4100 Installation Manual 1 1 Female Quick-Connect T erminal 1 1 (for remote turn-on input) 2mm Hex Wrench 1 1 3mm Hex Wrench 1 1 Mounting Screws 4 6 Parts List Specifications T echnical Specifications: GT -475 GT -4100 Rated Power (CEA-2006-A): @ 4-Ohm (Stereo): 75 W atts x 4 100 W atts x 4[...]

  • Page 4

    GT -475 GT -4100 1 3 2 2 4 6 5 8 7 1 3 2 2 4 6 5 8 7 Connections 4 Connections u Front RCA Input v Remote T urn-On (female spade connector supplied) w Rear RCA Input x Remote Gain Port (refer to GT -RSL manual for installation instruction) y Front Left/Right/Mono Speaker Outputs (12-gauge accepted) z Rear Left/Right/Mono Speaker Outputs (12-gauge a[...]

  • Page 5

    1 6 7 11 10 4 3 8 2 5 9 12 1 6 7 11 10 4 3 8 2 5 9 12 GT -475 GT -4100 Controls 5 Controls u Signal Routing Switch (Sends Front RCA Signal to Rear Channels) v Front Channel Input Sensitivity (250mv to 8.0v - continuously variable) w Front Channel Highpass Frequency Adjustment (20Hz to 350Hz - variable) x Front Channel Highpass Crossover OFF/ON Swit[...]

  • Page 6

    Installation - General 6 Installation - General W ARNING! 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 o[...]

  • Page 7

    Installation - Wiring 7 Installation - Wiring Amplifier Fuses Although the amplifier has an internal fuse, additional fuse protection should be installed as close as possible to the battery on the positive (+) power wire going to the amplifier . An inline fuse should be installed at no more than 18" (46cm) on the positive (+) power wire. The r[...]

  • Page 8

    T uning - Front and Rear Speakers 8 T uning The Amplifier - Front and Rear Speakers 1) Music The material chosen for system tuning must be both clear in recording quality and dynamic in amplitude. Many audiophile “test” discs have musical tracks with both of these characteristics and should be used. 2) Front Signal Routing Switch If using two s[...]

  • Page 9

    fuse T uning - Front and Rear Speakers 9 T uning The Amplifier - Front and Rear Speakers 6) Input Sensitivity Control Starting with the front channels, slowly rotate the control clockwise ( re f e r t o t h e d i ag r a m o n p a g e 5 ) until maxi- mum undistorted playing level is heard from the speakers. Listen closely for bottoming from the spea[...]

  • Page 10

    T uning - Subwoofers 10 T uning The Amplifier - Front Speakers and Subwoofer (s) 1) Front Signal Routing Switch If using two sets of RCAs (independent front and rear RCAs), set the switch to DEDICA TED FRONT AND REAR INPUTS . If you are using one set of RCAs for both front and rear channels, set the switch to SEND FRONT RCA SIGNAL TO REAR. (refer t[...]

  • Page 11

    fuse T uning - Subwoofers 11 T uning The Amplifier - Front Speakers and Subwoofer (s) Highpass Crossover Control (Front Channel Only) Cont. Slowly rotate the input sensitivity control clockwise until maximum undistorted playing level is heard from the speakers. Listen closely for bottoming from the speakers. If detected, rotate the input sensitivit[...]

  • Page 12

    Amplifier T roubleshooting Guide S tatus LEDs on Amplifier not Lit—Head Unit (Source) T urned “ON” V erify Remote turn-on wire from source to amplifier has proper voltage Power (B+) connections at amplifier , terminal blocks, and battery are secure Ground (GND) connections at amplifier and vehicle chassis are secure Battery B+ fuse and amplif[...]