SABINE FBX-1020 User Manual

OPERATING GUIDE
© 1995-2000 Sabine,
Inc.
CONGRATULATIONS! You now have the state-of-the-art in feedback control. Your Sabine FBX-1020 Feedback Exterminator
®
— a single channel,
20-bit digital filtering device — gives you automatic real-time feedback control and increases the clarity and volume of your system.
The FBX-1020 incorporates the latest in digital signal processing technology. It automatically senses feedback in a sound system and determines
its pitch. It then places one of 10 Constant Q micro-filters on the resonating frequency and eliminates the feedback in typically less than one second.
Special features of the FBX-1020:
• An improved algorithm that allows the FBX-1020 to better distinguish the difference between feedback and music
• Improved 20-bit digital resolution, providing superior dynamic range and signal-to-noise ratio
• 10 feedback filters, giving the unit more feedback elimination power for the toughest venues.
• ClipGuard™ adaptive clip level control, with TURBO setup mode, increases the effective dynamic range by more than 10dB
and makes setup faster and easier.
• Standard FBX features such as lockable fixed filters and switchable 1/10- and 1/5-octave Constant Q filters are also included
and now have convenient front panel switches.
QUICK-START OPERATION 1
DECLARATION OF CONFORMITY 2
ABOUT THE FBX-1020 3
FREQUENCY RESPONSE 3
WORLD'S BEST FEEDBACK CONTROLLER 3
WHO NEEDS FBX? 3
WHY THE FBX? 3
D
IRECT HIT ON FEEDBACK!3
A
CTIVE/BYPASS SWITCH 4
SIGNAL LEVEL 4
RESET 4
SET TOTAL NUMBER OF FILTERS 4
S
ET FIXED 4
A/C P
OWER INPUT 4
AUDIO INPUTS & OUTPUTS 4
FBX-1020 CONTROLS 4
LOCK FIXED FILTERS 4
FIFTH OCTAVE 4
FILTER STAGE A CTIVITY 4
POWER SWITCH 4
FUSE 4
APPLICATION DIAGRAMS 5
FBX SETUP FOR MONITORS 5
FBX SETUP FOR ENTIRE MIX 5
FBX-1020 OPERATING INSTRUCTIONS 6
WHERE THE FBX FITS IN YOUR SOUND SYSTEM 6
A NOTE ABOUT GRAPHIC EQUALIZERS 6
U
NDERSTANDING FIXED & DYNAMIC FILTERS 6
C
LIPGUARD™ ADAPTIVE CLIP LEVEL CONTROL 6
CLIPGUARDTM TURBO MODE GUIDE 6
FBX SETUP FOR SINGLE INSERT POINT 7
FBX SETUP FOR INSERT SEND & RETURN 7
H
OW TO OPERATE THE FBX-1020 7
H
OW TO USE THE FBX-1020 FEATURES 8
USING THE LOCK FIXED FEATURE 8
SELECTING FILTER WIDTH 8
IMPORTANT OPERATING CONSIDERATIONS 8
M
EMORY 8
B
YPASS MODE 8
RESETTING THE FILTERS 8
TURBO MODE SETUP 8
DEFEATING TURBO MODE 8
MOBILE VS. STATIONARY MICROPHONES 8
FREQUENTLY ASKED QUESTIONS 9
INDEX 9
FBX-1020 ENGINEERING SPECIFICATIONS 10
CAUTIONS & WARNINGS 11
LIMITED WARRANTY 12
QUICK-START OPERATION
For best results, read all operating instructions before using the FBX-1020. If you're already familiar with the FBX or just
want a basic overview of FBX operation, this simple quick-start procedure is for you. More detailed instructions are on
page 7 inside this operating guide.
1.Place the FBX between the output of your mixer and the input of your power amp.
2. With the master volume down, put the FBX-1020 in active mode (red BYPASS LED off), then slowly raise the mixer master
volume to the point of feedback.
3.Keep raising the master volume until all of your fixed filters and one dynamic filter are set, then lower the volume slightly.
(Factory default is nine fixed and three dynamic filters.) The rest of the filters continually catch and update new feedback
frequencies throughout the program. You're ready to go.
READ THE ENTIRE OPERATING GUIDE FOR COMPLETE INSTRUCTIONS.
V2

SABINE FBX-1020 Specifications

General

Channels	2
Maximum Input Level	+20dBu
Maximum Output Level	+20dBu
Type	Feedback Destroyer
Frequency Range	20Hz - 20kHz
Input Impedance	20k ohms
Dimensions	483 x 44 x 203mm

Summary

QUICK-START OPERATION

Quick-Start Procedure

Step-by-step guide for basic FBX-1020 operation and setup.

Product Overview and Features

Introduction to the FBX-1020, its technology, and key features.

ABOUT THE FBX-1020

Direct Hit on Feedback

Explains FBX filter precision versus graphic EQs for feedback control.

Frequency Response Comparison

Compares FBX 1/10-octave filter with 1/3-octave graphic EQ performance.

World's Best Feedback Controller

Highlights FBX advantages over traditional graphic equalizers.

Target Audience

Identifies who benefits from the FBX-1020 in various sound system applications.

FBX-1020 CONTROLS

Front Panel Controls

Detailed explanation of each button and LED on the FBX-1020 front panel.

Back Panel Connections and Power

Details A/C power input, audio I/O, and fuse replacement procedures.

APPLICATION DIAGRAMS

FBX Setup for Monitors

Wiring diagram showing connection for monitor outputs.

FBX Setup for Entire Mix

Wiring diagram illustrating connection for the main sound system mix.

FBX-1020 OPERATING INSTRUCTIONS

System Placement and Filter Types

Guidance on FBX placement and the difference between Fixed and Dynamic filters.

ClipGuard and TURBO Mode Features

Details ClipGuard adaptive clip level control and TURBO mode setup.

How To Operate The FBX-1020

Step-by-Step Operation Guide

Detailed steps for setting up and operating the FBX-1020 for maximum gain.

TURBO Mode and Feature Usage

Answers common questions about TURBO mode and using FBX features.

FREQUENTLY ASKED QUESTIONS

Common Operational Questions

Addresses queries on EQ loop placement, signal issues, and sound quality.

Index

Alphabetical listing of topics and their corresponding page references.

FBX-1020 ENGINEERING SPECIFICATIONS

Technical Specifications

Detailed specifications for filters, I/O, power, dimensions, and weight.

Simplified Internal Block Diagram

Visual representation of the FBX-1020's internal signal flow and components.

CAUTIONS & WARNINGS

Safety Precautions

Warnings regarding electrical safety, water exposure, ventilation, and general handling.

Regulatory Compliance

Statements on FCC and Canadian compliance for radio frequency emissions.

LIMITED WARRANTY

Warranty Terms and Conditions

Explains the one-year limited warranty, exclusions, and claims process.

Warranty Registration and Contact

Instructions for registering the product and contacting customer service for support.