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DFR22 -- Audio Processor
General Description
The DFR22 Audio Processor with Feedback Reduction is a 2input, 2output
digital audio processor. It is designed to equalize sound system response,
provide dynamics processing and alignment delay, and automatically de
tect and control acoustic feedback. A builtin 2 X 2 matrix mixer allows ei
ther or both inputs to be routed to either or both outputs, with additional
controls for levels and polarity.
The DFR22 is ideal for installed sound reinforcement applications, such as
houses of worship, theaters, and meeting facilities. It is also a powerful set
up tool in live music applications. Using the DFR22s draganddrop graphi
cal user interface, processors can be placed anywhere in the signal path.
DFR22 Features
• Shure's patented digital feedback reduction algorithm:
◦ Now includes stereo DFR processing capability
◦ New Auto Clear mode clears dynamic filters after a preset change or power cycle. Dynamic filters can be au
tomatically removed after a specified number of hours.
• Configurable signal path with drag and drop Windows interface. Includes graphic and parametric EQ, up to 10
seconds of delay, compression, limiting, gating, automatic gain control, ducking, and a fully configurable two-
way crossover.
• Phoenix and XLR connectors for each input and output
• Compatible with USB to serial port converters
• Front and back panel RS232 ports:
◦ 3-pin Phoenix connector on back panel
◦ DB9 connector on front panel; requires only TX, RX, and GND to be connected
• Three pre-loaded presets:
◦ Preset 1: Two mono 16 filter DFRs
◦ Preset 2: A stereo 16 filter DFR
◦ Preset 3: A mono 16 filter DFR on each input. Each input is routed to each output.
• Preset selector and indicator for up to 16 presets
• Control input pins for setting up remote preset, volume, and mute controls
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