Technical Data Voice Equalizer I88
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Technical Data VOICE EQUALIZER I88
Version 4HE


Input Standard Version
Type electronically balanced
nominal Level + 6 dBu
maximum Level1) ƒ ³ 40 Hz ³ + 30 dBu - Gain
Input Impedance ƒ 40 Hz - 15kHz ³ 10 kW
CMRR ƒ 40 Hz £ 15 kHz ³ 60 dB according to IRT
Input optionale Ausführung -s
Type balanced floating, Transformer
nominal Level + 6 dBu ± Gain
maximum Level1) ƒ ³ 40 Hz ³ + 30 dBu - Gain
Input Impedance ƒ 40 Hz - 15kHz ³ 10 kW
CMRR ƒ 40 Hz £ 15 kHz ³ 60 dB according to IRT


Output Standard Version
Type electronically balanced
nominal Level + 6 dBu
maximum Level1) ƒ ³ 40 Hz, kges 1 % ³ + 30 dBu
³ + 22 dBu with unbalanced Load
Source Impedance ƒ 40 Hz - 15 kHz £ 60 W
Load Resistor ³ 1200 W for + 30 dBu ³ 600 W for + 27 dBu
CMRR ƒ 40 Hz - 15 kHz ³ 40 dB according to IEC
Output optional Version -s
Type balanced floating, Transformer
nominal Level + 6 dBu
maximum Level1) ƒ ³ 40 Hz, kges 1 % ³ + 30 dBu
Source Impedance ƒ 40 Hz - 15 kHz £ 60 W
Load Resistor ³ 1200 W for + 30 dBu ³ 600 W for + 27 dBu
CMRR ƒ £ 15 kHz ³ 40 dB according to IEC
CMRR ƒ £ 15 kHz ³ 60 dB according to IRT


Gain 2) all Controls @ 0 dB 1 kHz 0 dB ± 0.5 dB


Frequency Response 2) all Controls @ 0 dB ƒ 20 Hz - 20 kHz ± 0.75 dB
Phase Response 2)
Input/Output ƒ 40 Hz - 15 kHz £ +5°/-20°
Standard RF / Subsonic Filters


THD £ +22 dBu, ƒ ³ 40 Hz - 15 kHz, kges £ 0.1 %


Dynamic Range 2) Vu 0 dB/22Hz-22kHz RMS ³ 116 dB - Gain
Noise Level 2) Vu 0 dB / 22Hz-22kHz RMS £-90 dBu


Size INTEGRATOR-Standard Cassette 4HE


Control Elements Potentiometer
EQ Gain
± 20 dB or ± 10 dB ± 1 dB by Switch per Band
Center Detent 0 dB
MID1 MID2 Bell -fully parametric, Vienna Bridge based
Frequency MID1 40 Hz to 5 kHz ± 15 %
Frequency MID2 250 Hz to 25 kHz ± 15 %
Q-Factor > 3 Oktaven to Third
HI-EQ Shelf / Bell by Switch
Q-Factor Hard (12 dB/Oct) / Soft (6 dB/Oct) by Switch
Frequency HI 4 kHz to 30 kHz ± 15 %
LOW-EQ Shelf / Bell by Switch
Q-Factor Hard (12 dB/Oct) / Soft (6 dB/Oct) by Switch
Frequency LOW 15 Hz to 0.5 kHz ± 15 %


1) Depending on the settings of the controls gain and attenuation is possible. Value refers to the higher level on input or output.
2) The value refers to linear setting of all EQ parameters.