3
CONNECTING A STEREO PREAMPLIFIER OR A SURROUND CONTROLLER TO THE UNBALANCED INPUTS ON YOUR A 21
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: | Left |
| |
• A pair of shielded interconnect cables with RCA plugs | Right |
• A source component with RCA output jacks | |
| RCA Plugs |
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
1
2
3&4
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.
|
| COMPONENTS | |
OUTPUTS |
| SURROUND | |
|
| SOUND | |
Right | Left | CONTROLLER | |
or | |||
|
| ||
|
| PREAMP |
2 
4
1 | 3 |
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.
