English - 29
Appendices
Appendix A: SA-4 amplifier connector panel
BoseLink
OUTPUT
connector
AC
POWER
VCA
SPEAKER
OUTPUTS
ROOM CODE switches
BoseLink
INPUT
connector
Indicator
Connector Description
AC
POWER
AC power cord connector. Power is applied when the power cord is
inserted and plugged into an AC (mains) outlet. There is no on/off switch
on the SoundTouch
™
SA-4 amplifier.
VCA
Local volume control connector. Allows you to control the volume using
a wall-mounted control. Contact your Bose dealer or call Bose customer
service for information on installing this feature. See the contact list
enclosed in the carton.
SPEAKER
OUTPUTS
Left and right speaker outputs. Connect only unpowered speakers. A
6-ohm minimum load is required. To determine the correct speaker wire
size, see “Speaker cable recommendations” on page 27.
ROOM
CODE
switches
Only switch A is used for SoundTouch
™
systems.
The output of the SoundTouch
™
SA-4 amplifier can
be set to stereo (Switch A up) or mono (Switch A
down). The mono output mode feeds left and right
channel audio to both the left and right outputs. This
is useful in situations where a stereo output isn’t
feasible such as when outdoor speakers are used in
a large area.
The remaining six switches should remain in the
default configuration:
Switch B Down
Switch C Down
Switch 6 Down
Switch 7 Down
Switch 8 Down
Switch 9 Up
Indicator
The green indicator shows the operational state of the SA-4 amplifier.
See “SoundTouch
™
SA-4 amplifier indicator” on page 19.
BoseLink
INPUT
Used for connecting the SoundTouch
™
wireless adapter to the
SA-4 amplifier.
BoseLink
OUTPUT
Not used.
