BSS - Dynamic Equaliser The DPR-901 II is a four-band parametric Dynamic Equaliser which allows frequency-selective compression (-3OdB) and expansion (+16dB). Each band has:
It has a filter switch on bands 1&4 which changes bell filter response to a shelving response and on bands 2 & 3 cancels the filter for wide band operation.
Electronically balanced input and output.
The unit may be set up as a 1 input/4band or 2 input / 2 bands per channel device, and the filter side chain may be monitored to allow precise tuning of the audio spectrum to be effected. Specifications
Impedance
Balanced 12kOhm differential
Headroom
+20dBv.
CMRR
Better Than-50dB, 20Hz to 20kHz
Connector
XLR3-31 or equivalent
Output Section
Balanced and floating to drive 600 Ohm loads.
Level
+20dBv into 600Ohm load
XLR3-32 or equivalent
System Performance
Frequency Response
+ 0.5dB, 20Hz to 20kHz, all sections bypassed
Noise
Measured to CCIR 468-2. Less than -90dBv, all controls set flat
Distortion
THD Less than 0.05%, 20Hz to 20kHz, SMPTE IM Less than 0.02%
Operating Controls
Threshold
Variable each band from +20dBv to -30dBv
Comp/Exp
Variable each band from -30dB compression to +16dB expansion. Soft knee at low settings
Below
Switched each band for below threshold activity
Fast Release
Switched each band to disable second stage of two part automatic time constant
Frequency Band 1
Variable from 40Hz to 320Hz
Frequency Band 2
Variable from 150Hz to 1.6kHz
Frequency Band 3
Variable from 800Hz to 9kHz
Frequency Band 4
Variable from 1.6kHz to 18kHz
Width
Variable each band from narrow (0.5) to wide (3). WIDTH control inoperative in SHELF mode
Filter Shelf
Selects shelf response (BANDS 1 and 4)
Filter Defeat
Selects broadband operation (BANDS 2and 3)
Band In
Switches each band into circuit
EQ In
Enables or bypasses the whole system
Metering
Compression
4 x 8 point LED displays showing compression activity. Scaled 1 to 8 for reference only
Expansion
4 x 8 point LED displays showing expansion activity. Scaled 1 to 8 reference only
4 x 6 point LED displays showing signal level in dBv relative to THRESHOLD setting
Output
Headroom indicator showing signal at -20, +10, +15dBv and clip
General
Size
482 x 44 x 228mm (19 x 1.75 x 9in) overall
Weight
5kg gross shipping
Electricity Supply
Switched 120/220v + 10%-20% 50/60Hz
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