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AMPERES MX2222 PRE-AMPLIFIER MIXER
Audio Signal Connections
1
2
3
1
2
3
MIC/BALANCED INPUT XLR
MIXER BALANCED OUTPUT XLR
1 - GROUND / SCREEN
2 - HOT ( +VE )
3 - COLD ( -VE )
FOR UNBALANCED, CONNECT
PIN 1 AND 3 TOGETHER
FOR UNBALANCED, SPARE PIN 3
PHONE JACK
TIP : +VE / HOT SIGNAL
RING : -VE / COLD
SLEEVE : GROUND / SCREEN
MALE
FEMALE
1
3
2
1
3
2
The diagram below shows pin configurations of XLR 3 pin Male and Female connectors as well as stereo phone jack which
is also used to connect balanced audio signals.
Unbalanced signals
Unbalanced system is found in most home AV system which uses two conductors to carry the audio signals, one being
“hot” and the other as “Ground”
Balanced signals
Two twisted cable and a ground shielding conductors are used to carry signal in a balanced system. The two signal
conductors transmit identical input signals but are out of phase with each other and the shielding conductor represents
ground / common.
Balanced signal is suitable for long distance audio transmission as they are less prone to noise pick up. Most professional
systems use this method of audio connection.
Unbalanced source to Balanced input terminal
If it is required to connect unbalanced source to the mixer with balanced connection, simplest method is to join Pin 1 and
3 of XLR connector or the stereo phone jack.
The best practice is to use a converter to this purpose. This is applicable for connection from balanced to unbalanced input
port. A DI box ( or line to XLR converter ) is recommended.
