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DFR11EQ Digital Equalizer
NOTE: The DFR11EQ has been discontinued. For an alternative, please see the DFR22 or contact us.
(Discontinued) A true problem-solver with features including 10 automatic, adaptive, feedback filters, equalizer limiter and delay for challenging acoustical situations.
Shure's DFR11EQ is a computer-controlled digital equalizer with a multitude of audio processing capabilities offered in a compact, half-rack unit. The innovative DFR software interface runs on Windows® and makes even the most complex processing functions easy to use.
The DFR11EQ Solves a Variety of Problems: Non-ideal acoustics, Iisufficient gain before feedback, irregular sound system frequency response, harmful signal peaks that can damage amplifiers and loudspeakers. Download DFR Software
- Selectable 10 bands of Parametric EQ or 1/3 Octave Graphic EQ
- Feedback Reduction with 10 precision notch filters that automatically seek out and reduce feedback
- 10 onboard Scene Presets, 3 accessible from the front panel.
- All onboard presets can also be accessed with the DRS-10 Digital Remote Switch accessory.
- Limiter and Delay
- Remote Modem Access, SIA-Smaart® Pro Interface, and Alternatives to Direct PC Control
- Frequency Response
- 20 to 20k Hz +/- 1.0 dB re 1 kHz
- Dynamic Range
- 104 dB minimum, A-weighted, 20 Hz to 20 kHz<br>
- 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 kilohms +/- 20% actual
- Output: 120 ohms +/- 20% actual
- Input Clipping Level
- +18 dBu minimum (at +4 dBu setting)
- +4 dBV minimum (at 10 dBV setting)
- Output Clipping Level
- +18 dBu minimum (at +4 dBu setting)
- +4 dBV 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 Ouput
- 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 degrees to 49 degrees C (20 degrees to 140 degrees F)
- Fuse
- DFR11EQ:120 Vac. Fuse: 100 mA, 250V time delay
- DFR11EQJ: 100 Vac. Fuse: 100 mA, 250V time delay
- DFR11EQE: 230 Vac. Fuse: 50 mA, 250 V time delay
- 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)
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 in User Guide).
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 1.3 seconds
- 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
