SABINE FBX-2020 Operating Manual

Manual is about: Dual Feedback Exterminator

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1995-2001 Sabine, Inc.

CONGRATULATIONS! You now have the state-of-the-art in feedback control. Your Sabine FBX-2020 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-2020 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-2020:

•

An improved algorithm that allows the FBX-2020 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

For best results, read all operating instructions before using the FBX-2020. 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.

Place the FBX between the output of your mixer and the input of your power amp.

With the master volume down, put the FBX-2020 in active mode (red BYPASS LED off), then

slowly raise the mixer master volume to the point of feedback.

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.

OPERATING GUIDE

QUICK-START OPERATION

DECLARATION OF CONFORMITY

APPLICATION OF COUNCIL DIRECTIVE 2

ABOUT THE FBX-2020

REQUENCY

ESPONSE

ORLD

EST

EEDBACK

ONTROLLER

EEDS

FBX?

THE

FBX?

IRECT

EEDBACK

CTIVE

YPASS

WITCH

IGNAL

EVEL

ESET

OTAL

UMBER

ILTERS

IXED

OCK

IXED

ILTERS

A/C P

OWER

NPUT

UDIO

NPUTS

& O

UTPUTS

FBX-2020 CONTROLS

IFTH

CTAVE

ILTER

TAGE

CTIVITY

OWER

WITCH

USE

APPLICATION DIAGRAMS

FBX S

ETUP

FOR

ONITORS

FBX S

ETUP

FOR

NTIRE

FBX S

ETUP

FOR

INGLE

NSERT

OINT

FBX S

ETUP

FOR

NSERT

END

& R

ETURN

FBX-2020

OPERATING

INSTRUCTIONS

HERE

THE

FBX

FITS

YOUR

SOUND

SYSTEM

NOTE

ABOUT

GRAPHIC

EQUALIZERS

NDERSTANDING

FIXED & DYNAMIC

FILTERS

LIP

UARD

™ A

DAPTIVE

LIP

EVEL

ONTROL

LIP

UARD

TM TURBO M

ODE

UIDE

PERATE

FBX-2020

FBX-2020 F

EATURES

SING

THE

LOCK FIXED

FEATURE

ELECTING

FILTER

WIDTH

MPORTANT

PERATING

ONSIDERATIONS

EMORY

YPASS

ODE

ESETTING

THE

FILTERS

TURBO M

ODE

ETUP

EFEATING

URBO

ODE

OBILE

. S

TATIONARY

ICROPHONES

FREQUENTLY ASKED QUESTIONS

INDEX

FBX-2020 ENGINEERING SPECIFICATIONS

CAUTIONS & WARNINGS

LIMITED WARRANTY

1 2 3 4 5 6 7 Next › »

Summary of FBX-2020

Page 1
? 1995-2001 sabine, inc. Congratulations! You now have the state-of-the-art in feedback control. Your sabine fbx-2020 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 ...
Page 2
2 declaration of conformity application of council directive: 73/23/eec and 89/336/eec standard to which conformity is declared: en 60065:1993 en 50082-1:1992 en 55022 class b manufacturer’s name: sabine, inc. Manufacturer’s address: 13301 highway 441 alachua, fl 32615-8544 usa type of equipment: eq...
Page 3
3 about the fbx-2020 3 direct hit on feedback! The fbx targets feedback without taking a big chunk out of your sound. Tests prove that a single 1/3-octave eq slider pulled down 12 db removes almost half the power going to the speakers over a two-octave range. And, as this illustration shows, you can...
Page 4
4 fbx-2020 controls a/c power input the fbx-2020 is factory configured to operate at either 115 vac or 230 vac. Using the wrong input voltage may cause perma- nent damage to the unit and will void the warranty. Audio inputs & outputs 1/4" trs and xlr balanced and unbalanced. Active/bypass switch byp...
Page 5
5 application diagrams fbx setup for entire mix fbx out main out fbx in amp in amplifier all other signal processing equipment fbx setup for monitors monitor out fbx in fbx out amp in amplifier.
Page 6
6 where the fbx fits in your sound system place the fbx anywhere in the sound system that a graphic equalizer might be used to control feedback. The most com- mon place is between the output of the mixer and the input of a power amp. In this position, the fbx can sense and eliminate feedback occurri...
Page 7
7 ! R e a d this important tip you can mix 1/10- and 1/5-octave filters in the same channel. If you have an especially bad feedback problem, try making the first few filters 1/5-octave and the remaining filters 1/10-octave. Turbo mode speeds up the fbx filter initial- ization process so that it take...
Page 8
8 how to use the fbx-2020 features using the lock fixed feature in very few situations the fbx may mistake music for feedback and drive the fixed filters deeper than necessary, such as in a church with a pipe organ, or during a performance with a great deal of intentional sustained electric guitar f...
Page 9
9 frequently asked questions q. Can i place the fbx in the mixer’s eq loop? A. Yes. Q. Can i place the unit in the mixer effects loop? A. Avoid this configuration if possible. You can configure the system this way only if each effects send of each mixer channel is set so that all of the signal is ro...
Page 10
10 fbx-2020 engineering specifications (specifications subject to change without notice) filters 10 independent digital notch filters, controlled automatically from 40 hz to 20 khz. Filter width: user-controllable, either 1/10 or 1/5 oct., constant q 1 resolution: 1/50th octave time required to find...
Page 11: Caution!
11 warning! This equipment must be earthed. Caution! Risk of electric shock. Do not open. Caution! Shock hazard. Do not remove covers. No user serviceable parts inside. Refer servicing to qualified service personnel. Warning! To reduce the risk of fire or electric shock, do not expose this product t...
Page 12
12 sabine, inc. 13301 highway 441 alachua, florida 32615-8544 phone: (386) 418-2000 fax: (386) 418-2001 © 2000 sabine, inc. Limited warranty caution fbx and fbx feedback exterminator are registered trademarks of sabine, inc., and are the brand names of its line of automatic feedback controllers. Cov...