Boston Acoustics GT-424-Channel - Manual (Page 12)

12
Mono Subwoofer Operation
If the amplifier is to be bridged and used with a subwoofer connected to the REAR channels, use the
“SPEAKER OUTPUT” terminals marked for mono 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 system setup must be both clear in recording quality and dynam-
ic in amplitude. Many audiophile “test” discs have musical tracks with both of these characteristics and should
be used.
2) FRONT and REAR Sensitivity Controls
Turn controls all the way counterclockwise (minimum position). In this position,
the amplifier will be less sensitive to the input signal from the head unit.
Setup Tuning—Full-Range Speakers
FRONT crossover control REAR crossover control
3) FRONT and REAR Crossover Controls
Crossovers should be turned off during this phase of set-up. Move the HIGHPASS and FILTER switches to
the “OFF” position—with these settings, full-range signal is sent to the FRONT & REAR speaker outputs.
2-ohm minimum
L OW PA S S S L O P E
1 2 d B 2 4 d B
M O N O
1 2 d B
S T
L OW PA S S
O F F O N
5 0
3 5 0
H z 2 0 0
H I G H PA S S
O F F O N
2 0
3 5 0
H z 1 8 5