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 |