P. 2
AUDIOLAB EQ-2231 -
EQ-2231
2 x 31-Band Graphic Equalizer
EQ-2231
is a 2 x 31 band graphic equalizer that
features a 4 LED bar graph indicator for monitoring
gain reduction and output levels. The unit also has
a noise reduction, limiter and 40Hz low cut button.
The unit ships with ¼” and XLR connectors.
Specifications
Inputs
• Connectors: XLR/TRS ¼” & barrier terminal
strip
• Type: Electronically balanced/unbalanced,RF
filtered
• Impedance: 40KOhm (Balanced) & 20KOhm
(Unbalanced)
• Max Input Level: >+21dBu,balanced or unbal-
anced
• CMRR: >40dB, typically >55dB at 1KHz
Outputs
• Connectors: XLR/TRS ¼” & barrier terminal
strip
• Type: Electronically balanced/unbalanced,RF
filtered
• Impedance: 120KOhm (Balanced) & 60KOhm
(Unbalanced)
• Max Output Level:
• - >+21dBu,balanced/unbalanced into 2KOhm
or greater
• - >+18dBm,balanced/unbalanced (into 600-
Ohm)
System Performance
• Bandwidth: 20Hz to 20KHz, +0.5/-1dB
• Frequency Response: <10Hz to>50KHz,+0.5/-
3dB
• Noise Reduction In: (+/-6 and +/-15dB range):
• Signal-to-Noise: >100dB,unweighted,ref:+4d-
Bu,22KHz measurement bandwidth
• Dynamic Range: >118dB,unweighted
• Noise Reduction Out: (+/-6dB range):
• Signal-to-Noise: >94dB,unweighted,ref:+4d-
Bu,22KHz measurement bandwidthDynamic
Range: >112dB,unweighted
• Noise Reduction Out: (+/-15dB range):
• Signal-to-Noise: >90dB,unweighted,ref:+4d-
Bu,22KHz measurement bandwidth
• Dynamic Range: >108dB,unweighted
• THD+Noise:
• - <0.04%,0.02%typical at +4dBu,1KHz
• - <0.5%, at 1KHz with 15dB gain reduction
• Interchannel Crosstalk: <-80dB,20Hz to
20KHz (2215/2231)
• Noise Reduction: Up to 20dB of dynamic
broadband noise reduction
Function Switches
• EQ BYPASS: Bypasses the graphic equalizer
section in the signal path
• LOW CUT(recessed): Activates the 40Hz 18dB/
octave Bessel high-pass filter
• RANGE(recessed): Selects /-6dB or +/-
15dB slider boost/cut range
Indicators
• Output Level: 4-LED bar graph
(Green,Green,Yellow,Red) at-10,0,+10,and
+18dBu
• Gain Reduction: 4-LED bar graph (all Red) at
0,3,6,and 10dB
1. OVERVIEW
English version
