TL Audio A1 - Manual (Page 8)

7
INSTALLATION
AC Mains Supply.
The unit is fitted with an internationally approved 3 pin IEC connector. A mating
socket with power cord and mains plug is supplied. All mains wiring should be
performed by a qualified electrician with all power switched off, and the earth
connection must be used.
Please note that when using this unit with alternate supply voltages (in foreign
countries, for example) the internal wiring of the unit may be set for 115V (accepting
voltages in the range 110V to 120V, 60Hz AC) or to 230V (for voltages in the range
220V to 240V, 50Hz AC). If the wiring needs to be changed, the unit must be taken to
an approved service centre.
Alternate supply voltages may also require a different power cable or mains plug. If in
doubt, consult local electrical regulations.
Warning: attempted operation on the wrong voltage setting, or with an
incorrect fuse, will invalidate the warranty.
Audio Inputs.
Each channel has a female, 3 pin XLR connector, for connection to a microphone.
The microphone will normally be balanced, but unbalanced connections may also be
made as follows:
Balanced inputs:
- Pin 1 = Ground (screen).
- Pin 2 = Signal Phase (“+” or “hot”).
- Pin 3 = Signal Non-Phase (“-” or “cold”).
Unbalanced inputs:
- Pin 1 = Ground (screen)
- Pin 2 = Signal Phase (“+” or “hot”).
- Pin 3 = Signal Ground.
When using unbalanced signals, the signal ground may be obtained by linking pins 1
and 3 in the mating XLR connector. Do not leave pin 3 open circuit, as this may result