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iEQ User Manual

iEQ

PeakStopPlus

Limiter Control

ThiscontrolengagesthePeakStopPlus™limiter.Itsetsthethresholdlevelatwhich∞:1gainreduction

will begin to occur� It is capable of a range of 0dBu through “OFF” (+20dBu)� When the threshold

control is set to “OFF”, the limiter is effectively disabled, and no gain reduction will occur�

AFS™ (Advanced Feedback Suppression) Button

This button engages the AFS function of the iEQ-15 and iEQ-31 and clears the AFS filters� If AFS is

off, the filters are bypassed and the algorithm is halted (the filters are not updated)� If AFS is on, the

filters are active� The AFS selections represent the width of the filters and determine how fast AFS

reacts� These AFS selections are as follows:

AFS

Selection

Description

AFS Button LED

Color

Bandwidth Q

Off AFS processing is disabled� Off - -

Music Low

Faster response time, lower

fidelity�

Green 1/10 Octave 14�5

Music Medium

Good combination of response

time and fidelity�

Yellow 1/20 Octave 29

Music High

Slightly slower response time, high

fidelity�

Red 1/80 Octave 116

See the “Operation” section of this manual for further information regarding AFS�

Type V™ NR Button

This button engages the dbx Type V™ noise reduction circuit within the iEQ� Typically, graphic

equalizers will raise the noise floor as the frequency band sliders are adjusted� dbx’s proprietary Type V™

noise reduction solves this problem by reducing the apparent noise floor using its simultaneous encode/

decode process (shown below)� The button lights when the dbx Type V™ noise reduction circuit is

activated�

Ty pe V™

Encode

Simultaneous Encode/Decode Control

Audio Audio

Ty pe V™

Decode

NOTE: dbx Type V™ noise reduction effectively reduces the inherent noise floor within the iEQ�

However, it will not reduce noise introduced into the system from other locations in the signal path�

Frequency Band Sliders

Each one of these slider potentiometers will boost or cut at its noted frequency by ±6dB or ±15dB,

depending upon the position of the RANGE button� When all the sliders are in the center detented

position, the output of the equalizer is flat� The frequency band centers of the iEQ-31 are marked at

1/3rd of an octave intervals on ISO standard spacings, while the frequency band centers of the iEQ-15

are marked at 2/3rds of an octave intervals on ISO standard spacings�

Low Cut Button

The LOW CUT button inserts (when lit) or removes the 18dB/octave 40Hz Bessel low-cut filter from

the signal path� When the LOW CUT button is pushed in, the LOW CUT filter is in the audio path�

Rear / Front Panels