Filter
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ENGLISH
SPECIFICATIONS
Frequency Response
20 to 20k Hz ± 1.0 dB re 1 kHz
Dynamic Range
104 dB minimum, A-weighted, 20 Hz to 20 kHz
Sampling Rate
48 kHz
Digital–to–Analog, Analog–to–Digital Conversion
20 bit resolution
Voltage Gain
–1 dB ± 1dB (power off)
0 dB ± 2 dB (equal input and output sensitivities)
12 dB ± 2 dB (input –10 dBV, output +4 dBu)
–12 dB ± 2 dB (input +4 dBu, output –10 dBv)
Impedance
Input: 47 kΩ ± 20% actual
Output: 120 Ω ± 20% actual
Input Clipping Level
+18 dBu minimum (at +4 dBu setting)
+6 dBu minimum (at –10 dBV setting)
Output Clipping Level
+18 dBu minimum (at +4 dBu setting)
+6 dBu minimum (at –10 dBV setting)
Total Harmonic Distortion
< 0.05% at 1 kHz, +4 dBu, 20 to 20 kHz
LED Signal Indicators
Clip: 6 dB down from input clipping
Propagation Delay from Input to Output
< 1.0 ms, all filters set to Flat (0 ms delay setting)
Polarity
Input to output: non-inverting
XLR: pin 2 positive with respect to pin 3
1
/
4
in. TRS: tip positive with respect to ring
Operating Voltage
DFR11EQ: 120 Vac, 50/60 Hz, 75 mA max
DFR11EQJ: 100 Vac, 50/60 Hz, 75 mA max
DFR11EQE: 230-240 Vac, 50/60 Hz, 38 mA max
Temperature Range
Operating: –7° to 49° C (20° to 140° F)
Dimensions
219 mm x 137 mm x 44.5 mm (8
5
/
8
in x 5
3
/
8
in x 1
3
/
4
in)
Weight
930 g (2.05 lbs)
Fuse
DFR11EQ:120 Vac. Fuse: 100 mA, 250V time delay
DFR11EQJ: 100 Vac.Fuse: 100 mA, 250V time delay
DFR11EQE: 230-240 Vac. Fuse: 50 mA, 250 V time delay
In order to change a blown fuse, remove the power cord and pry open
the drawer with a flathead screwdriver.
FEEDBACK FILTERS
Ten (10)
1
/
10
octave adaptive notch filters from 60 Hz to 20 kHz
Deployed to 1 Hz resolution of feedback frequency
Deployed in depths of 3 dB, 6 dB, 9 dB, 12 dB, and 18 dB (12.5
Low Q in graphic EQ mode) attenuation
Filter shape variable between HI Q and LOW Q (see High Q vs.
Low Q Filters).
GRAPHIC EQUALIZER
Frequency Bands
30 bands on ISO,
1
/
3
octave centers
Filter Type
1
/
3
octave, constant Q
Maximum Boost
6 dB per band
Maximum Cut
12dB per band, high- and low-pass filters, 12dB/octave nominal
PARAMETRIC EQUALIZER
Frequency Bands
10 bands, variable frequency, variable Q
Boost/Cut Range
+6 dB to –18 dB per band
Q Range
1
/
40
octave to 2 octave
Shelf/Rolloff Filters
Shelf, +6 to –18 dB per filter
Rolloff, 6dB, 12dB, 18dB, or 24dB per octave nominal
DELAY
Up to 1300 ms
LIMITER
Threshold: –60 dBFs to –0.5 dBFs, 0.5 dB resolution
Attack: 1 ms to 200 ms
Decay: 50 ms to 1000 ms
Ratio: ∞ to 1
FUSE