Professional Reference Headphones

The Shure Mixer & DSP Series DFR 22 has quickly become the industry standard for effective feedback reduction. The DFR22 builds on that reputation to provide an affordable full-featured 2x2 audio processor with drag-and-drop software.

Two Channels. A Powerful Processor. The DFR-22 is ideal for installed sound reinforcement applications, such as houses of worship, theaters, and meeting facilities.

DFR22 is also a powerful setup tool in live music applications. Using the DFR22®s drag-and-drop graphical user interface, processors can be placed anywhere in the signal path.

→ 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

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
Input Impedance	10 kilohms
Output Impedance	120 ohms
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 to 240 Vac, 50/60 Hz (auto-switching), 1 A, maximum
Maximum Power Drain	45W
Operating Temperature	-7 degrees to 49 degrees C (19 degrees to 120 degrees F)
Storage Temperature	-29 degrees to 74 degrees C (-20 degrees to 165 degrees 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)