BiG SiX User Guide
Appendix B
41
Appendix B - Performance Specification
Audio Performance
Default test conditions (unless otherwise stated):
-
Source impedance of Test Set: 40 Ω
-
Input impedance of Test Set: 200 kΩ
-
Reference frequency: 1 kHz
-
Reference level: 0 dBu where 0 dBu = 0.775 V into any load
-
All unweighted measurements are specified as 22 Hz to 22 kHz band limited RMS and are expressed in units of dBu
-
The onset of clipping (for headroom measurements) should be taken as 1% THD
-
All distortion measurements are specified with a 36 dB/Octave low pass filter at 20 kHz and are expressed as a percentage
-
All levels are intended balanced
Unless otherwise quoted all figures have a tolerance of ±0.5 dB or 5 %.
SuperAnalogue Channel Microphone Amplifier
Measurement
Conditions
Value
Gain
**dependent on potentiometer tolerances
Variable from +6 dB to +72 dB**
Input Impedance
1.2 kΩ
Max Input Level
1% THD
21 dBu
Output Headroom
>+27 dBu at onset of clipping
Frequency Response
-
20 Hz to 20 kHz
-
-3 dB high rolloff
-
+0.0/-0.2 dB
-
> 80 kHz
THD+Noise
(-20 dBu applied, +30 dB gain) @ 1 kHz (filter 22 Hz to 22
kHz)
-
< 0.0015 %
CMRR
(-10 dBu applied, +30 dB gain) @100 Hz
-
> 90 dB
Equivelent Input Noise (EIN)
150 Ω termination, maximum gain
-
<-127.5 dBu
-
typically -129 dBu
SuperAnalogue Channel Line Input Amplifier
Measurement
Conditions
Value
Gain
**dependent on potentiometer tolerances
Variable from -3 dB to +63 dB**
Input Impedance
10 kΩ
Hi-Z Input Impedance
1 MΩ
Max Input Level
1% THD
>+27 dBu before clipping
Output Headroom
>+27 dBu at onset of clipping
Frequency Response
-
20 Hz to 20 kHz
-
-3 dB high rolloff
+0.0/-0.2 dB
> 80 kHz
THD+Noise
(-20 dBu applied, +30 dB gain) @ 1kHz (filter 22 Hz to 22
kHz)
< 0.0015 %
CMRR
(-10 dBu applied, +30 dB gain) @100 Hz
> 80 dB
Equivelent Input Noise (EIN)
150 Ω termination, maximum gain
<-120 dBu
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