TL Audio 5050 - Manual (Page 9)

The instrument input has a 1M Ω impedance and is suitable for direct
connection of instruments including guitars, bass guitars and keyboards. Good
quality screened cable should be used, particularly for microphone or low level
sources, to prevent hum or noise pickup.
3.6 Output.
A balanced line output is provided on a 0.25” TRS jack socket, at a nominal
level of +4dBu. The mating connector should be appropriately wired as
follows for balanced or unbalanced operation:
Balanced outputs:
- Screen = Ground.
- Tip = Signal Phase (“+” or “hot”).
- Ring = Signal Non-Phase (“-” or “cold”).
Unbalanced outputs:
- Screen = Ground (screen)
- Tip = Signal Phase (“+” or “hot”).
- Ring = Signal Ground
3.7 Mounting.
The 5050 may be free standing, or mounted in a standard 19” rack. Always
ensure that the cooling vents on the front and sides are clear of obstruction,
and do not subject the unit to an external source of heat (by mounting
immediately above a power amplifier, for example). If used free standing,
ensure that the equipment is protected against rain and spillage of liquid.
3.8 Rear
Panel.
The rear panel connectors are identified in Fig.3. Make sure that all settings,
mains and audio connections have been made as described above before
attempting to operate the equipment.
4. OPERATION