Specifications

DFM 4 x 4
Item number
DFM 4 x 4 6000H1894
Sound
Processing
155
• Digital four-channel signal processor with feedback
eliminator
• Up to 12 user adjustable filters on each channel
• Compressor, limiter, and audio delay on each channel
• RS-232 serial port for control by PC, AMX
®
, or
Crestron
™
– 8 preset memories
The DFM 4x4 multi-channel DSP is an uncommonly versa-
tile professional processor for feedback elimination,
speaker zoning, delay control, and complete system control
for complex sound systems at conference centers, large
places of worship, multipurpose halls, hotels, etc.
SPECIFICATIONS
User adjustable filters: 1st order high and lowpass,
2nd order high, band, and lowpass,
1st order shelving bass and treble,
2nd order shelving bass and treble
parametric
Feedback eliminator (ADFE)
Filter type: 1/5 octave notch with 1/10 octave accuracy
Filter attenuation: -6 dB, -12 dB
Filter range: 100 Hz to 5.6 kHz
Compressor
Attack time: 0.5 msecs. to 128 msecs. in 0.5-msec. increments
Release time: 10 msecs. to 2.55 secs. in 10-msec. increments
Threshold: -40 dBu to +20 dBu in 1-dB increments
Digital delay
Delay time: 182.625 msecs. max., in 20.83 µsec. increments
Programmable inputs/outputs
Remote level control voltage: 0 to 5 VDC
Analog control range: -30 dB to 0 dB, plus OFF
156 mV/dB control sensitivity
Logic control: active low
Programmable outputs: active low, Serial port, Default
LecNet™ address: 143
Serial port parameters: RS 232, 9600 baud, 8 data bits,
no parity, 1 stop bit
System THD: <0.05% (+20 dBu in, +20 dBu out)
System IMD: <0.05%
Connectors: AUDIO: 5-pin Phoenix
PROGRAMMABLE I/O: 15-pin D-sub
Power requirement: 10 watts max. at 16.5 VAC
Size: 483 x 44 x 203 mm (19 x 1.7 x 8 in.)
Weight: 1.4 kg (3.1 lbs.)
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