Rupert Neve Shelford 5052: Mic Pre / Inductor EQ - Manual (Page 13)

Total Harmonic Distortion and Noise
@ 1kHz, +20dBu output level, no load. Better than 0.002%
@ 20Hz, +20dBu output level, no load. 0.08% Typical (2nd and 3rd
harmonic)
Total Harmonic Distortion and Noise with SILK engaged
RED
TEXTURE @ min
@ 100Hz, +20dBu input level, no load
0.015%, mostly 3rd harmonic
(typical)
TEXTURE @ max
@ 100Hz, +20dBu input level, no load
1.5%, mostly 2rd harmonic (typical)
BLUE
TEXTURE @ min
@ 100Hz, +20dBu input level, no load
0.0075%, mostly 3rd harmonic
(typical)
TEXTURE @ max
@ 100Hz, +20dBu input level, no load
1%, mostly 2rd harmonic (typical)
EQ Input
Noise Better than -105dBV
Un-weighted, 22Hz-22kHz, source impedance 40 Ohms balanced, no load.
Frequency Response
+/- 0.1dBu from 10Hz to 40kHz
-1dB @ 174kHz
Maximum Output Level 26dBu
Total Harmonic Distortion and Noise
@ 1kHz, +20dBu output level, hi Z. Better than 0.002%
@ 20Hz, +20dBu output level, hi Z. 0.006% Typical (2nd and 3rd
harmonic)
High Pass Filter
Continuously variable swept frequency from 20Hz to 250Hz.
Slope:
12dB/Octave
w/ Equaliser Engaged
Noise
Un-weighted, 22Hz-22kHz, source impedance 40 Ohms balanced, no load.
Better than -95dBV
Maximum Output Level
25dBu