Rocktron HUSH Super C User Manual

STEREO NOISE EXTERMINATOR FOR GUITAR PLAYERS

USER'S MANUAL

May be covered by one or more of the following: U.S. Patents #4538297, 4647876, 4696044, 4745309, 4881047, 4893099, 5124657, 5263091, 5268527,
5319713, 5333201, 5402498, 5493617 and 5638452. Other patents pending. Foreign patents pending.

Your

Super C

following Standards and Directives as set forth by the European Union:

This means that this product has been designed to meet stringent guidelines on how
much RF energy it can emit, and that it should be immune from other sources of interfer­ence when properly used. Improper use of this equipment could result in increased RF
emissions, which may or may not interfere with other electronic products.

To insure against this possibility, always use good shielded cables for all audio input and
output connections. Also, bundle audio cables separately from the AC power cables.
These steps will help insure compliance with the Directive(s).

For more information about other Rocktron products, please see your local dealer or one
of our importers closest to you (listed on the enclosed warranty sheet).

HUSH® noise reduction system has been tested and complies with the

Council Directive(s): 89/336/EEC Electromagnetic Compatibility
Standard(s): EN55013, EN50082-1

Copyright © 1997 Rocktron Corporation
All Rights Reserved.

Contents

Introduction ......................................................... 1

About the SSM2000.................................................1

Super C Front Panel............................................ 3

Super C Rear Panel............................................. 4

System Connections........................................... 5

Mono Applications ...................................................5

Stereo Applications..................................................6

Operation ............................................................. 7

HUSH® Section.......................................................7

Gate Section............................................................9

Specifications.................................................... 10

Introduction

Congratulations on your purchase of the Rocktron HUSH® Super C™!

Designed for guitar applications, the Super C utilizes the latest in HUSH noise
reduction technology (including the SSM2000 HUSH IC, available from Analog
Devices) combined with the latest V.I.R. (Variable Integrated Release) circuitry
configured as a noise gate. This combination provides extremely effective noise
reduction while playing and complete silence when not.

Although the Super C is a stereo noise reduction system, a single HUSH
Threshold and Gate Threshold are used to control both channels.

This manual will introduce you to the various features and functions of the
Super C. Please keep it for future reference.

About the SSM2000...

The SSM2000 is an advanced audio noise reduction system based on
patented HUSH® technology. The SSM2000 is commercially available from
Analog Devices, produced under the license of the HUSH patents. HUSH
combines a dynamic filter and downward expander to provide a high level
effectiveness without the sonic artifacts normally associated with noise
reduction systems. In addition, an Adaptive Threshold circuit detects
nominal signal levels and dynamically adjusts both thresholds, thereby
providing optimal results regardless of program source. Since it is a single­ended system, HUSH can be used on virtually any audio source, including
audio and video tapes, radio and television broadcasts, or any other source
with objectionable noise. The SSM2000 can also be used with Dolby
encoded sources with excellent results.

FEATURES:

• Up to 25dB of noise reduction from

virtually any audio source without sonic
artifacts

• External port available for additional

attenuation— providing in excess of 85dB
of noise reduction

• "Single-ended" operation eliminates need

for encode-decode process

• Adaptive threshold dynamically adjusts to

changing nominal signal levels

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• Effectively decodes Dolby

sources

encoded

• Direct VCA control port access for additional
level control functionality

• Logic-controllable bypass and muting

• Flexible on-chip voltage reference

• 100dB dynamic range (noise reduction OFF)

• 0.02% typical THD+N (@ 1kHz, noise
reduction OFF)

• +7V to +20V operation

• No royalty requirements

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