Aphex Compellor 320A User Manual

Owner’s Manual
Dual Mono/Stereo Automatic Level Controller
Manual P/N 999-0760 • Revision 2 • 09/30/03
Copyright 2003 Aphex Systems Ltd. All rights reserved. Printed in U.S.A. Written and produced by Donn Werrbach.
Compellor
®
320A
Compellor
®
S Y S T E M S
11068 Randall St., Sun Valley, CA 91352 U.S.A.

Aphex Compellor 320A Specifications

General

Channels	2
Input Impedance	10 kΩ
Maximum Input Level	+24 dBu
Maximum Output Level	+24 dBu
Inputs	XLR, TRS
Outputs	XLR, TRS
Frequency Response	20 Hz to 20 kHz
Noise	-90dBu
Power Requirements	100-240 VAC, 50/60 Hz
Dimensions	19" x 1.75" x 8.5"

Summary

Safety Declarations

Quick Start Guide

Introduction to the Compellor

What is a Compellor?

Defines the Compellor as a transparent audio level controller.

Compellor Functionality & History

Explains what the Compellor does and its development background.

Installation and Setup

Unpacking, Damage, and Claims

Instructions for unpacking and handling shipping damage.

Mains Voltage and Fuse Setup

Guidance on selecting the correct mains voltage and fuse.

Power Cord and Rack Mounting

Information on power cords, rack mounting, and ventilation.

Safety, Tools, and Panel Security

Lists required tools, safety considerations, and panel security options.

Reference Levels and Connections

Details on setting reference levels and connecting audio signals.

Specifications Overview

Input, Output, and Audio Specs

Technical details on connectors, impedance, and audio performance.

System Functions and Controls

Lists key functions like leveling, compression, and threshold settings.

Ratio, Timing, and Other Specs

Details compression parameters, timing, and physical specifications.

Operating the Compellor

Recording and Mixing Applications

Using the Compellor for consistent levels in recording and mixing.

Mastering and Post-Production Use

Applying the Compellor to master tracks and in video post-production.

Live Sound and Broadcast Use

Using the Compellor for live concerts and broadcast applications.

Specialized Applications

Covers tape duplication, voice processing, and hard disk recording.

System Description and Functions

Signal Flow and Processing Overview

Describes the audio path and primary automatic gain control functions.

Leveling, Compressor, and Gate Functions

Explains leveling, compressor, DRC, DVG, and Silence Gate.

Controls and Metering Explained

Covers process balance, drive, output controls, and metering displays.

Warranty and Service Information

Limited Warranty Terms

Outlines warranty period, scope, and exclusions.

How to Obtain Service

Provides instructions on returning the unit for repair.

Appendices: Technical Guides

Appendix A: Lines and Levels

Explains audio signal transmission lines and operating levels.

Appendix B: Grounding and Hum

Addresses common ground loop problems and hum elimination.

Appendix D: Cable Wiring Standards

Covers connector wiring conventions for audio cables.

Appendix C: Wiring Techniques

Details standard wiring practices for audio connectors.

Appendix E: Reference Levels Explained

Analog vs. Digital Levels

Discusses average vs. peak levels in analog and digital audio systems.

Handling Codecs and STLs

Addresses level discrepancies with codecs and studio-transmitter links.

Appendix F: Level Measurement Confusion

Understanding Measurement Standards

Explains the confusion between peak and average audio measurements.

Metering Standards and Digital Issues

Compares PPM, VU, and dBFS metering and digital audio challenges.

Compellor in Digital Environments

Discusses Compellor's role in digital audio and level setup.