4081 User Manual Issue 2
Technical / Physical Information
Dimensions
19" Rack Mount Width mm (inches) Height mm (inches) Depth mm (inches)
2 units plus fixing
brackets
218 (8½) 88.2 (3½) 267 (10½)
Power Requirements
External Power supply Rated Voltage 100 – 240V AC
External Power supply Rated Frequency 50 - 60 Hz
External Power supply Rated Current 1.9A Max
Fuse (inside the 4081 unit):
Input voltage 48V DC
Fuse rating / type
1A
(20mm x 5mm)
Location FS1
Mains Power
The power supply is universal input type and therefore no mains operating
voltage setting is required.
Audio Specification
Mic Input
XLR input, Z in 1Kohm @ 1kHz
Gain +20 dB to +70 dB in 5dB steps
Maximum mic input level
(with Pad)
+24dB
Outputs
Max +26dB into 600 ohms
Z out 50 ohms +/-5% @ 1kHz, balanced
Distortion <0.07% for 20dBm output from 50Hz to 10kHz @ 60dB Gain
Equivalent Input Noise >-123dBm 20Hz to 20kHz @60dB Gain
Line Input Z in 50k ohm, unity gain, electronically balanced
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