Introduction, Pc bal box—simple hum free connectivity, Operating instructions – Interspace Industries PC Bal Box User Manual
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Introduction
PC Bal Box is a multipurpose audio interfacing tool especially designed to 
address a multitude of audio needs in the professional AV market. 
 
Features include: 
 
Stereo to Mono Switch.
Bandwidth 85Hz to 16KHz. Signal levels depend on input level and output 
impedance. 
Bi-directional balancing - simple conversion of unbalanced stereo audio to 
balanced stereo, in either direction. 
Output Pad from –2dB/ -20dB.
Earth (Ground) lift - switchable grounding on outputs to cure induced hum or 
cross-talk effects. 
Passive adaptor - no external or battery power required.
Input fixed cable 3.5 mm mini jack.
PC Bal Box—Simple hum free connectivity
 
We hope that PC Bal Box exceeds your expectations and welcome any 
feedback that you have about this or any of our products. 
 
Thank you. 
 
The Interspace Industries Team 
www.interspaceind.com
Operating Instructions
PC Bal box is 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. 
 
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.