Bose® SA-4 Owner's Manual

Setting up the System

CAUTIONS:
•  Use only 

unpowered speakers. DO NOT connect any make or model of  

powered speakers. Doing so may cause damage to the equipment.

•  The SoundTouch

™

 SA-4 amplifier requires a 6-ohm minimum load.

Speaker cables consist of two insulated wires. Often, one wire is marked (striped, 

colored, or ribbed), indicating it should be connected to the positive (+) terminal. 

The plain wire should be connected to the negative (–) terminal. For recommended 

wire sizes and lengths, see “Speaker cable recommendations” on page 27.
1.  Disconnect the SA-4 amplifier from AC (mains) power.
2.  Remove the terminal block connector from the SPEAKER OUTPUTS  

connector on the rear panel of the SA-4 amplifier.

3.  Use a small, flat-head screwdriver to connect the left speaker cable to the  

L positive (+) and minus (–) terminals of the 4-pin terminal block connector,  

and the right speaker cable to the R positive (+) and minus (–) terminals.

4.  Plug the terminal block connector into the SPEAKER OUTPUTS connector.

Bose 251

®

 Environmental Speakers 

shown for illustration only.