Quickstart Guide
15
Connector Wiring
The microphone and line inputs are designed to accept balanced (three conductor) connections, and
it is recommended that this method be used since it offers the best rejection of noise, hum and radio
interference, especially where long cable runs are involved. XLR connectors should be wired pin 2 hot
(positive), pin 3 cold (negative) and pin 1 ground, while the standard wiring for 3-pole jack plug connectors
is tip hot (positive), ring cold (negative) and sleeve ground as shown below.
ground
hot
cold
ground
hot
cold
Balanced male XLR
Balanced female XLR
Some signal sources such as keyboards and acoustic guitars with on-board electronics commonly provide
only an unbalanced output on a 2-pole jack connector. The Milan loudspeaker line input can handle these
connections without any rewiring since pin 3 (-ve) of the input is automatically grounded by the jack plug.
3-pole j ack (balanced)
sleeve - ground
tip - hot
ring - cold
2-pole J ack (unbalanced)
ground
tip - hot
cold
If an unbalanced source is to be connected to an input channel via the XLR line input connector,
either 2-pole or 3-pole jack plugs can be used. In both cases pin 3 should be connected to pin 1 (ground)
at the XLR as shown here.
1 (ground)
2
3
tip
ring
sleeve
1 (ground)
2
3
tip
sleeve
Some sources such as mp3 players or CD players commonly provide 2-pole unbalanced phono
connectors, and these can be connected to a line input via either the XLR connector or jack connector.
In either case wire the connectors as follows:
1 (ground)
2
3
tip
sleeve
tip
sleeve
tip
sleeve
