Introduction
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iEQ User Manual
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iEQ
Congratulations on your purchase of the dbx Professional Products iEQ Series Graphic
Equalizer/Limiter with Type V™ noise reduction and AFS™. With an EQ heritage that has pro-
duced countless industry standard patents and dates back more than 30 years, the dbx iEQ 15
and iEQ 31 easily live up to the dbx legacy of uncompromised sonic integrity. In addition to
unsurpassed equalization specs, the iEQ series also offer built-in necessities which include
AFS™ Feedback Suppression, Type V™ Noise reduction and PeakStopPlus®limiting. Besides
including two 15-Band channels, 2/3 octave (iEQ 15) and two 31-band channels (iEQ 31) of
1/3-octave equalization, the iEQ 15 and iEQ 31 also offer +12 dB input gain range; switchable
+6 or +15 dB boost/cut range, 40mm faders, XLR, 1/4'' and Euroblock inputs and outputs, non-
conductive nylon sliders; and an intuitive user interface with comprehensive output and gain
reduction metering. As always, the inevitable result of our meticulous attention to detail and
top-quality componentry is exceptional sound, performance, and reliability.
This manual will be your guide to understanding the full functionality of the powerful iEQ
series. After you have become familiar with the unit, we encourage you to experiment and find
creative ways that the iEQ series can help you optimize your specific application.
The dbx iEQ Series Graphic Equalizer provide the user with the following features:
• Advanced Feedback Suppression (AFS™)
• Type V™ Noise Reduction
• PeakStopPlus®Limiting
• 1/3 & 2/3-octave Constant Q frequency bands
• Switchable boost/cut ranges of ±6 or ±15 dB
• 18 dB per octave 40Hz low-cut filter
• ±12 dB input gain range
• XLR,TRS and Euroblock Inputs and Outputs
• Internal Toroidal Transformer
• Dynamic range of greater than 113dB
• User Power Up Features
• Relay Bypass for Power Failure System Protection