Main Features
- Balanced input for microphone
- Balanced and unbalanced output
- Level control
- 3-band equaliser
- Runs from battery, plugpack or phantom power
- Battery indicator
- Ground lift
- Rugged diecast housing
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Whether it is for karaoke, public address or for a band, a
microphone connection to an amplifier is a basic requirement. This Balanced
Microphone Preamplifier includes a 3-band equaliser and can be used to drive a
guitar amplifier, any stereo amplifier or provide an additional channel for a
public address amplifier.
Balanced microphones are desirable since they prevent the
injection of hum and noise into the sound system. A balanced microphone has a
3-wire cable usually connected via XLR plugs and sockets. XLR pin 1 is the
return or ground and the other two terminals (pins 2 & 3) are for the
signals. The signals are in anti-phase; in other words when one line goes
positive, the other line swings negative by the same amount. Any hum that is
picked up along the lead is effectively cancelled because the same level of hum
will be present in both signal lines.
