c h a n n e l s t r i p
8
Audio Inputs and Outputs
All the audio signal connections are via connectors mounted on the rear panel.
Mic
XLR input for microphones only.
Line
XLR input for line level signals (such as the output from a tape
machine) .
Instrument
1/4” stereo jack input for instruments (from guitars with coil pickups to
keyboards) – inserting a mono jack plug in this socket automatically
gives unbalanced input. Connecting anything into this input
disconnects the line input XLR.
Inst switch
Modifies the impedance of the Instrument socket, to suit the
instrument connected. If connecting an instrument with pickups,
switch the Inst button on the back panel to the Hi-Z setting, which
prevents the unit from loading the pickups, so giving full frequency
response. Selecting Hi-Z illuminates the Inst light on the front panel. If
connecting a line-level instrument (such as a keyboard) switch the Inst
button on the back panel to the Line setting, or use the Line input.
All XLR connections are wired to the AES standards, with the screen (pin 1)
connected to the chassis earth point:
Pin 1
Screen
chassis
Pin 2
Live
audio 0°
Pin 3
Return
audio 180°
You can make either balanced or unbalanced connections to the inputs and output.
When the screen and earth wiring of the module is completed correctly, all modules
which are marked with the European Community CE marking comply fully with the CE
EMC regulations.
Instrument
Input
Inst
Mic Input
Line Input
Hi–Z
+18dB
Line
