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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

Off

AFS processing is disabled�

Faster response time, lower

Music Low

Good combination of response

Music Medium

Slightly slower response time, high

Music High

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�

Simultaneous Encode/Decode Control

Audio

Type V™

Encode

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�

Description

fidelity�

time and fidelity�

fidelity�

Audio

Type V™

Decode

Rear / Front Panels

AFS Button LED

Bandwidth

Color

Off

Green

1/10 Octave

Yellow

1/20 Octave

Red

1/80 Octave

iEQ User Manual

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