Allen&Heath Scepter USER GUIDE - Manual (Page 12)

Audio Owner Manual Section 1
ELECTRONIC PERFORMANCE continued
THD typically better than 0.04%
at ‘normal levels and gain settings
--
NOISE PERFORMANCE: RMS noise 20kHz bandwidth
L or input faders closed)-83dBu
L or input unity gain)-83dBu
Aux
Microphone Input equivalent noise-l 27dBu (200 Source)
7