Boston-Acoustics-GT-2125-Owners-Manual.pdf

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2-Channel Ampli er Owners Manual
GT-275
GT-2125
GT-2200
GT-2300
Table Of Contents
Introduction
Thank you for choosing Boston Acoustics and congratulations on your purchase of the
Boston GT Amplifier. If you own other Boston products, the outstanding audio performance
and ease-of-use of the GT Amplifier should come as no surprise. If you’re new to Boston,
welcome – we think you’ve made a great choice.
Table of Contents
Parts list
Specifications
Connections
Top panel removal / installation
Controls
Status LEDs
Installation - General
Before you install
Battery and charging system
Wire routing
Choose the mounting location
Passenger & trunk compartment mounting
Multi-Position Mounting Feet
Vents
Installation - Wiring
Amplifier fuses
Wire gauge
Power 12v and ground (GND) connection
Remote input connection
Speaker output connection
Mono subwoofer operation
Tuning The Amplifier - Front or Rear Speakers
Music
Input sensitivity control
Highpass and lowpass crossover controls
Head unit
Volume
2-channel highpass operation switch configuration diagram
Input sensitivity control
Crossover controls
“Q” control
2-channel operation wiring configuration diagram
Tuning The Amplifier - Subwoofers
Input switch
Head unit
Volume
Input sensitivity control
Bridged lowpass with Q-Tune
™
switch configuration diagram
Lowpass crossover control
Highpass crossover control
GT-RSL
Bridged operation wiring configuration diagram
Amplifier Troubleshooting Guide
Service Information
2
3
4
5
6
7
8
10
12
Parts And Specifications
Parts List
Included Hardware:
Installation Manual
Female Quick-Connect Terminal
(for remote turn-on input)
GT-275
1
1
1
1
4
GT-2125
1
1
1
1
4
GT-2200
1
1
1
1
4
GT-2300
1
1
1
1
6
2mm Hex Wrench
3mm Hex Wrench
Mounting Screws
Specifications
Technical Specifications:
Rated Power (CEA-2006-A):
@ 4-Ohm (Stereo):
@ 2-Ohm (Stereo)
@ 4-Ohm (Mono)
@ 2-Ohm (Mono)
Rated Power (12v):
@ 4-Ohm (Stereo):
@ 2-Ohm (Mono)
Frequency Response (-3dB):
Signal-to-Noise Ratio (A Weighted):
THD+N:
HighPass Crossover:
Frequency Range:
Slope (dB Per Octave):
LowPass Crossover:
Frequency Range:
Slope (dB Per Octave):
Signal Voltage Input Range:
Fuse Amp Rating:
Dimensions:
Width:
Height:
Depth:
GT-275
75 Watts x 2
120 Watts x 2
225 Watts x 1
300 Watts x 1
GT-2125
125
200
400
600
Watts
Watts
Watts
Watts
x
x
x
x
2
2
1
1
GT-2200
200
350
700
900
Watts
Watts
Watts
Watts
x
x
x
x
2
2
1
1
GT-2300
300 Watts x 2
500 Watts x 2
1000 Watts x 1
1400 Watts x 1
55 Watts x 2
230 Watts x 1
95 Watts x 2
475 Watts x 1
160 Watts x 2
750 Watts x 1
260 Watts x 2
1175 Watts x 1
10Hz–95kHz
>100dB
0.03
10Hz–95kHz
>100dB
0.03
10Hz–95kHz
>100dB
0.03
10Hz–95kHz
>100dB
0.03
20Hz - 350Hz
12dB
20Hz - 350Hz
12dB
20Hz - 350Hz
12dB
20Hz - 350Hz
12dB
50Hz - 350Hz
12dB or 24dB
200mv - 8v
30 Amp
50Hz - 350Hz 50Hz - 350Hz 50Hz - 350Hz
12dB or 24db 12dB or 24db 12dB or 24db
200mv - 8v
40 Amp
200mv - 8v
70 Amp
200mv - 8v
100 Amp
8
3
⁄
4
”
(223mm)
2
3
⁄
8
”
(61mm)
9”
(229mm)
13
1
⁄
4
”
(337mm)
18
3
⁄
4
”
(477mm)
2
3
⁄
8
”
(61mm)
2
3
⁄
8
”
(61mm)
9”
(229mm)
9”
(229mm)
22
1
⁄
4
”
(566mm)
2
3
⁄
8
”
(61mm)
9”
(229mm)
3
Connections
Connections
GT-2300
1
2
3
4
5
6
GT-2200
1
2
3
4
5 6
GT-2125
GT-275
1
2
3
4
5 6
1
2
4
5 6
Stereo RCA Input
Remote Turn-On (female spade connector supplied)
Remote Gain Port (refer to GT-RSL manual for installation instruction)
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
Controls
Controls
GT-2300
1
2
3
4
5 6 7
8 9
10
GT-2200
1
2
3
4
5 6 7
8 9
10
GT-2125
GT-275
1
2
3
4
5 6 7
8 9
10
1 4 5 6 7 8 9
10
Stereo/Mono Switch
Remote Gain OFF/ON Switch (ON when using GT-RSL)
Lowpass Slope Switch (12dB Stereo, 12dB Mono, or 24dB Mono)
Lowpass Crossover OFF/ON Switch (OFF/12dB/24dB on GT-275)
Lowpass Frequency Adjustment (50Hz to 350Hz - continuously variable)
Input Sensitivity (250mv to 8.0v - continuously variable)
Highpass Crossover OFF/ON Switch
Highpass Crossover Q-Tune
™
Adjustment (0.707 to 1.6 - continuously variable)
Highpass Frequency Adjustment (20Hz to 350Hz - continuously variable)
Fuse (replace with same value mini ANL only, refer to specifications on page 3)
Status LEDs
Red
Orange
The Boston Logo will illuminate “Red” under normal operating conditions.
The Orange LED (not visible unless lit) will illuminate during start-up and under fault conditions. If this
is illuminated after start-up, please refer to troubleshooting on page 12.
5

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