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Appendices
Specifications
General and Bus Compressor
Default test conditions (unless otherwise stated):
Source impedance of test set: 40 Ω
Input impedance of test set: 100 kΩ
Reference frequency: 1 kHz
Reference level: 0 dBu
All unweighted measurements are specified as 20 Hz to 20 kHz bandwidth limited, expressed in dBu
Onset of clipping (for headroom measurements) should be taken as 1% THD
Measurements taken with default input trim setting (0 dB)
All levels are intended balanced
Mode set to Classic Stereo
D-EQ modules bypassed
Mix pot set fully wet
LPF disabled
4K Mode, LOW THD, F/B: disabled
Threshold +20 dB
Unless otherwise quoted all figures have a tolerance of ±0.5dB or 5%.
Audio Performance
Measurement
Input Impedance
Output Impedance
Maximum Input & Output Level
Frequency Response
THD+N
Noise
Dynamic Range
Crosstalk
Make-Up Gain Precision
Stereo Matching
32
Value
10 kΩ
60 Ω
+27.5 dBu
±0.025 dB
< 1 Hz
> 200 kHz
±0.01 dB
< 2 Hz
> 180 kHz
-95 dB / 0.0017% typical
-106 dB / 0.0004% typical
-88 dB / 0.004% typical
-95 dBu typical
-90 dBu typical
-89 dBu typical
122.5 dB
117.5 dB
< -118 dB
< -110 dB
< -90 dB
< 0.003 dB
< 0.05 dB
< 0.02 dB
< 0.1 dB
Conditions
-
-
Operating Level Modes 0 dB/-5 dB, 1% THD
Bypassed, 20 Hz to 20 kHz
Bypassed, -3 dB low cut-off
Bypassed, -3 dB high cut-off
Compressor In, 20 Hz to 20 kHz
Compressor In, -3 dB low cut-off
Compressor In, -3 dB high cut-off
Bypassed, 1 kHz @ 0 dBu
Bypassed, 1 kHz @ +20 dBu
Compressor In, 1 kHz @ 0 dBu
Bypassed
Compressor In
4K Mode In (any intensity)
Bypassed
Compressor In
Bypassed, 20 Hz @ +24dBu
Bypassed, 1 kHz @ +24 dBu
Bypassed, 10 kHz @ +24 dBu
- 10 dB to + 20 dB
Bypassed
In, 1 kHz @ 0 dBu
Dual Mono, any setting gain reduction <8 dB
THE BUS+ User Guide
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