Interspace Industries PC Bal Box User Manual

PC Bal Box

User Manual

Cueing and Presentation Control Specialists

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.

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Earth Lift

Using SoundConnect it is possible to isolate the computer or consumer audio
source device earth system to defeat possible hum loops. When using the Earth
(Ground) lift feature it is essential however that the receiving equipment (i.e. the
sound desk) has a reliable balanced input earth.

Stereo / Mono

This allows the combining of both left and right stereo channels via an internal
resistive network to protect the source device (output drivers). A 600ohm, high
bandwidth audio transformers provides a fully balanced output.

DECLARATION OF CONFORMITY

We declare under our sole responsibility that the product

PC bal Box

Conform to the following standards:

BS EN 61000-6-3:2001

Following the provision of:

Issued on: Date 22 Feb. 06

Dave Humphrys
Managing Director, Interspace Industries Ltd

WEEE and RoHS Compliance. PC Bal Box and its associated accessories have
been manufactured and sold in accordance with the requirements of the EC WEEE
and RoHS directives. Please return all end-of-life items to your supplier, or
Interspace Industries directly, for appropriate disposal.

BS EN 61000-6-3:2001

The Low Voltage Directive 73/23/EEC and

The Electromagnetic Compatibility Directive 89/336/EEC

Environmental

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For Technical Support or Sales Enquiries:

Interspace Industries Head Office:

[phone]

Emergency Technical Support Hot Line:

[phone]

Website:

www.interspaceind.com

Unit 1A

126 Great North Rd

Hatfield, Hertfordshire

AL9 5JN

UK

Tel: [phone]

Email: [e-mail]

www.interspaceind.com

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