The Joemeek SC2.2 uses a photoelectric gain-control element with modern servo-control techniques to maintain accuracy and speed of response to the light source. Its specifications boast distortion within 0.004% 100 Hz to 10 kHz at all levels and system noise generally better than 94 dBu from 20 Hz to 20 kHz. The box is flat from 5 Hz to 30 kHz with minimal phase shift at extremes and crosstalk is better than 60 dB at 10 kHz.Since the SC2.2 came out it been upgraded. One upgrade feature was the switchable power transformer, and the other was a new feature called "Dark Mode". The dark Mode switch is an added circuit that replicates the sound of the old Joemeek V1.05 by slowing down the speed of the attack and release times creating a darker sound originally offered by the early Joemeek SC2 V1.05
