Interspace Industries Phono to XLR Balancing Box - PXB - Manual (Page 6)

6
Operating Instructions
PXB is a totally passive - no batteries or external power supply is required.
It provides a simple means of connecting a computer or consumer audio
source to a professional sound system.
Fig 1. Connection Diagram
Pad Switch
Ideal for interfacing line:mic levels in either direction, the pad switch will
attenuate the audio level between input and output by approx 20dB via a
resistive network.
As this unit is passive, it is possible to use it as a line level input to com-
puters with a 3.5mm stereo jack microphone input. This will need to be
checked thoroughly first however. Ensure the pad switch is ‘on’ and the
unbalanced input on the PXB is connected to the computer mic input.
Balanced audio can then be connected from the sound desk to the output
of the PXB. This will enable balanced transmission to unbalanced recep-
tion, thereby reducing line-induced hum.