Graphic EQ
Multipoint correction



The constant Q graphic equalisers EQ-215 (dual, 2/ 3 octave) and EQ-230
 (dual, 1/ 3 octave) incorporate new functions like selection of equalisation range
 and selective faders illumination as well as improved specifications in increased dynamic 
 range and better filter musicality. A rear panel switch (ON-SCAN-OFF) associated with
 the faders illumination system warrants the adaptability to the different application
 fields: disk, live music, bands or monitor systems.
   The equaliser EQ-230 combines in a compact 3u rack format, two 30 bands single
 channel graphic equalisers, two fully parametric equalisation points and a feedback finder
 system (FFS), giving the professionals a complete toolkit.
   Unlike other automatic feedback destruction systems, the FFS is a simple feedback finder
 which allows the operator the freedom of eliminating the feedbacks while monitoring
 and evaluating at the same time, the effect produced on the equalisation.
 Included in a monitor system it helps locating the send that is causing the feedback.
 A delaying circuit extends the visualization time of the last feedback during a few
 seconds even though the real feedback situation might have ceased as it normally occurs.
 HI-PASS: Continuoslly variable high pass filter (10Hz-300Hz) in order to delimit
 the bandwidth. This filter is of great utility when miking string instruments,
 voices and to control low frequency feedback,...
 BALANCED: Equipped with electronically balanced input and output circuits for noise
 inmmunity in long cabling set-ups.
 CONSTANT Q: The constant Q topology assures minimum interaction between bands
 and makes the bandwidth of each filter independent of the gain/attenuation setting.
 RANGE: Global selection of the range of gain/attenuation of each band for a more precise
 adjustment. Front panel Indication by double LED.
 FFS: Feedback finder system (only EQ-230). A microprocessor associated with each
 channel scans the whole spectrum in order to detect and display possible feedbacks.
 Direct LED fader indication.
 PARAMETRIC: Incorporates a totally parametric equalization point on each channel
 (only EQ-230). The range is asymmetric (+15dB, -30dB) allowing notch filter adjustments.
 LOW NOISE: The use of very low noise circuits and other techniques permit achieving
 an exceptional dinamic range.
 AUTO-BYPASS: Incorporates secure by-pass circuits controlled by relay for the on/off
 switch transients elimination and for signal integrity in the case of internal failures.
 Technical Data:    
 Number of bands:    EQ-215: 15+15 bands, 2/3 octave, ISO standard
 EQ-230: 30+30 bands, 1/3 octave, ISO standard
 Filters type:    Band-pass constant Q
 Centre frequencies:    Better than +/- 4% of nominal
 Cut/boost:    Selectable between +/- 12dB, at 6dB by means
 of the range switch
 High Pass Filter (HPF) :    12dB/octave, sweepable frequency 10Hz - 30 Hz
 Parametric filter:    Gain:          Adjustable between +15 and -30 dBu
 Frequency: Adjistable between 32Hz - 16KHz
 Q:              Adjustable between 0,5 and 10
 Channel separation:    Greater than 75dB, 20Hz - 20KHz
 Gain/Attenuation:    +6dB-, Level control by calibrated rotatory potentiometr
 Distortion (THD):    Less than 0,01 at 0dBu 20Hz - 20 KHz
 Maximum input level:    +21dBu (with all bands flat)
 Input impedance:    10KΩ unbalanced, 10KΩ balanced
 CMRR:    Breater than 65dB, 20Hz - 20 KHz
 Maximum output level:    +21dBu over 600 Ω (0,1% THD)
 Output impedance:    100Ω unbalanced, 100Ω balanced
 Signal to noise ratio:    Greater than 115dB ref. +20dBu unweighted
 (20Hz - 20KHz)
 Frequency response:    20Hz - 40KHz (+0, -0,5dB)
 Power supply:    Selectable between 115 and 230 VAC ±12%, 50 - 60Hz
 Net weight:    EQ-215: 4,5 Kg
 EQ-230: 6,0 Kg
 Dimension (WxHxD):    EQ-215: 483x89x200mm
 EQ-230: 483x123x200mm
 Power consumption:    EQ-215: 30 VA
 EQ-230: 40 VA