Bose® SA-4 Owner's Manual

BoseLink  

OUTPUT  

connector

AC 

POWER

VCA

SPEAKER 

OUTPUTS

ROOM CODE switches

BoseLink  

INPUT  

connector

Status indicator

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

 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

Status 

indicator

The green indicator shows the operational state of the SA-4 amplifier.  

See “SoundTouch

™

 SA-4 amplifier status indicator” on page 19.

BoseLink 

INPUT

Used for connecting the SoundTouch

™

 wireless adapter to the  

SA-4 amplifier.

BoseLink 

OUTPUT

Not used.

Appendices