Left and Right Unbalanced Inputs
Use these inputs if your preamplifier or surround controller doesn’t have balanced
output connectors or if you simply prefer to use unbalanced connections.
What You’ll Need:
• A pair of shielded interconnect cables with RCA plugs
• A source component with RCA output jacks
Before Connecting
Leave the AC cord on the A 21 disconnected until you have made all other connections
to prevent any surprise burst of sound.
Make sure that all your cables are long enough so they are not strained or stretched
once they are connected.
Make sure the
Inputs
switch on the A 21 is in its
Unbalanced
(down) position and the
Ground
switch is in its
Normal
(down) position.
To Connect
Plug one end of the cable into the
Unbalanced Right Channel Input
jack on the A 21.
Plug the other end of this cable into the unbalanced right channel output jack
on your
preamplifier (or a channel on your surround controller).
Repeat steps 1 and 2 for the left channel.
CONNECTING A STEREO PREAMPLIFIER OR A SURROUND
CONTROLLER TO THE UNBALANCED INPUTS ON YOUR A 21
3
3
COMPONENTS
SURROUND
SOUND
CONTROLLER
PREAMP
OUTPUTS
or
4
2
1
Right
Left
2
RCA Plugs
Right
Left
3
&
4
1
YOU SHOULD KNOW
Interconnect Cables and Their Color Codes
Common color codes for input and output jacks are red for right and white for left. Match
the colors at the outputs from your preamplifier or surround controller to the inputs on your
A 21 so you’ll always hear the channels in their intended position.
