Shure DFR22 Audio Processor

The Shure DFR Difference.

Featuring enhancements to a patented Adaptive Notch Filter Algorithm, the DFR22 includes single-channel and stereo processing blocks with up to 16 precision notch filters that automatically seek out and reduce feedback. With widths between 1/10 and 1/70 of an octave, these adaptive filters affect only the problem frequencies, maximizing system stability and sound integrity. In addition, Auto Clear mode removes dynamic filters and restores the DFR to your ideally-tuned configuration after a specified amount of time.

Features:

• DFR Automatic Feedback Reduction
• Parametric and Graphic Equalizers
• Cut/Shelf Equalizer
• Compressors/Limiters
• Automatic Gain Control
• Gate/Downward Expander
• Ducker
• 2-Way Crossover
• Subwoofer Processor
• Splitter
• Delay Processors
• 2x2 Matrix Mixer

Specifications:

• Frequency Response: 20 Hz to 20 kHz ±1 dB
• Dynamic Range: 110 dB minimum, A-weighted, 20 Hz to 20 kHz
• Sampling Rate: 48 kHz
• Digital-to-Analog, Analog-to-Digital Conversion: 24 bit
• Impedance:
  • Input: 10 kΩ
  • Output: 120 Ω
• Input Clipping Level: +24 dBu minimum
• Output Clipping Level:
  • +24 dBu
  • +12 dBu (with 12 dB pad)
  • +6 dBu (with 18 dB pad)
• Total Harmonic Distortion: < 0.05%, +4 dBu, 20 Hz to 20 kHz
• Propagation Delay from Input to Output: <1.5 ms
• Polarity: Input to output: non-inverting (inverting optional)
• Operating Voltage: 100-240 Vac, 50/60 Hz (auto-switching), 1 A, maximum
• Maximum Power Drain: 45W
• Temperature Range:
  • Operating: -7° to 49° C (19° to 120° F)
  • Storage: -29° to 74° C (-20° to 165° F)
• Dimensions: 482.6 mm x 247.7 mm x 44.4 mm (19 in. x 9.75 in. x 1.75 in.)
• Weight: 2.83 kg (6.25 lbs)