![Left and Right Balanced Input Jacks](/images/new-backgrounds/17654/176549x1.webp)
CONNECTING A STEREO PREAMPLIFIER OR A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 21
Left and Right Balanced Input Jacks
2
Balanced connections will give you the best sound. If your preamplifier or surround controller has balanced XLR output jacks, we recommend that you connect them to these inputs. Refer to the Balanced and Unbalanced Lines in the Technically Speaking section for additional information about why we recommend using balanced lines.
What You’ll Need:
•One pair of balanced interconnect cables with XLR connectors
•A preamplifier or surround controller with balanced outputs
Male
Female
XLR Connectors
Before Connecting
Leave the A 21’s AC cord 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 rear of the A 21 is in its Balanced (up) position and the Ground switch is in its Normal (down) position.
To Connect
1Plug the male end of the balanced interconnect cable into the Balanced Right Channel input jack on the A 21.
2Plug the female end of this cable into the balanced right channel output jack on your preamplifier (or a channel on your surround controller).
3&4 Repeat steps 1 and 2 above to connect the left channel.
|
| COMPONENTS |
OUTPUTS | SURROUND | |
|
| SOUND |
1 2 | 1 2 | CONTROLLER |
3 | 3 | or |
|
| |
Right | Left | PREAMP |
2
4
13
YOU SHOULD KNOW
Balanced XLR Jacks and Their Pin Configuration
The balanced inputs of the A 21 use XLR jacks that conform to the industry standard of: Pin 1: Ground, Pin 2: Positive (+), Pin 3: Negative