Boston Acoustics GT-475, GT-4100 User Manual
4-Channel Amplier Owners Manual
GT-475
GT-4100
Introduction
Thank you for choosing Boston Acoustics®and congratulations on your purchase of the
Boston GT
performance and ease-of-use of the GT Amplifier should come as no surprise. If you’re
new to Boston, welcome – you’ve made a great choice.
®
Amplifier. If you own other Boston products, the outstanding audio
Table of Contents
Parts list 3
Specifications
Connections 4
Top panel removal / installation
Table Of Contents
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
Venting
Installation - Wiring 7
Amplifier fuses
Wire gauge
Power 12v and ground (GND) connection
Remote input connection
Speaker output connection
Mono subwoofer operation
Tuning The Amplifier - Front and Rear Speakers 8
Music
Front signal routing switch
Input sensitivity control
Highpass and lowpass crossover controls
Head unit
Volume
4-channel highpass operation switch configuration diagram
Input sensitivity control
Crossover controls
Q-Tune
4-channel operation wiring configuration diagram
™
control
Tuning The Amplifier - Front Speakers and Subwoofers 10
Front signal routing switch
Head unit
Volume
Input sensitivity control
Highpass crossover control
Q-Tune
Rear input switch
Lowpass crossover control
GT-RSL
Bridged operation wiring configuration diagram
Amplifier Troubleshooting Guide 12
Service Information
22
™
control
Parts List
Included Hardware: GT-475 GT-4100
Installation Manual 1 1
Female Quick-Connect Terminal 1 1
(for remote turn-on input)
2mm Hex Wrench 1 1
3mm Hex Wrench 1 1
Mounting Screws 4 6
Specifications
Technical Specifications: GT-475 GT-4100
Rated Power (CEA-2006-A):
@ 4-Ohm (Stereo): 75 Watts x 4 100 Watts x 4
@ 2-Ohm (Stereo) 120 Watts x 4 150 Watts x 4
@ 2-Ohm (Mono) 250 Watts x 2 450 Watts x 2
Parts And Specifications
Mixed Operation (CEA-2006-A):
@ 4-Ohm (Stereo) & 2-ohm (Mono): 75 W x 2, 250 W x 1 100 W x 2, 450 W x 1
Rated Power (12v):
@ 4-Ohm (Stereo): 65 Watts x 4 85 Watts x 4
@ 2-Ohm (Mono) 200 Watts x 2 330 Watts x 2
Frequency Response (-3dB): 10Hz–95kHz 10Hz–95kHz
Signal-to-Noise Ratio (A Weighted): >100dB >100dB
THD+N: 0.03 0.03
Highpass Crossover:
Frequency Range: 20Hz - 350Hz 20Hz - 350Hz
Slope (dB Per Octave): 12dB 12dB
Lowpass Crossover (Rear Channel Only):
Frequency Range: 50Hz - 350Hz 50Hz - 350Hz
Slope (dB Per Octave): 12dB 12dB
Signal Voltage Input Range: 200mv - 8v 200mv - 8v
Fuse Amp Rating:
40 Amp
80 Amp
Dimensions:
Width: 14
Height: 2 3⁄8” (61mm) 23⁄8” (61mm)
Depth: 9” (229mm) 9” (229mm)
3
⁄4” (375mm) 22 1⁄4” (566mm)
3
GT-475
GT-4100
1 32 2 4 65 87
1 32 2 4 65 87
Connections
Connections
u Front RCA Input
v Remote Turn-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 accepted)
{ 12v Power Input (4-gauge accepted)
| Ground Wire Input (4-gauge accepted)
Top Panel Removal / Installation
The cover panel is secured with two (2) 3mm screws. Once unscrewed, pull panel forward,
once clear of the corners of the end panels, it will lift off. Reverse to reinstall.
4
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