TL Audio 5051 - Manual (Page 7)

Balanced inputs:
- Pin 1 = Ground (screen).
- Pin 2 = Signal Phase (also known as “+” 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.
3.3
Balanced Line Input.
The 5051 has a 3 pin XLR socket on the rear panel, which will accept both
balanced and unbalanced line level inputs. The mating connector should be
appropriately wired as follows:
Balanced inputs:
- Screen = Ground,
- Tip = Signal Phase (“+” or “hot”),
- Ring = Signal Non-Phase (“-” or “cold”).
Unbalanced inputs:
- Screen = Ground,
- Tip = Signal Phase (“+” or “hot”),
- Ring = Ground.
When using unbalanced signals, the signal ground may be obtained by linking
pins 1 and 3 in the mating XLR connector. If this connection is not made, a
loss in level may result.
3.4
Unbalanced Line Input.
An unbalanced line level input at a nominal level of -10dBu is also provided,
on a 0.25” mono jack socket. The mating plugs should be wired as follows: