The OKM technical data in connection with the adapter A3

OKM I OKM II classic OKM II pop-AV OKM II Rock
Frequency range 30 Hz to 20 kHz 20 Hz to 20 kHz 20 Hz to 20 kHz 20 Hz to 20 kHz
Channel Balance typ. < 1,5 dB typ. < 1,0 dB typ < 1.0 dB typ. < 1,0 dB
Channel Balance studio-versions typ. < 0,5 dB typ. < 0,5 dB typ. < 0,5 dB
S/N ratio re 1 Pa approx. 58 dB approx. 61 dB approx. 61 dB circa 41 dB
Max. SPL
(with A 3 Adapter)		108 dB108 dB111 dB132 dB
Max SPL
(with A 3 Adapter 20 dB att)		125 dB125 dB128 dB142 dB
Operating voltage max.10 V10 V10 V15 V

See to this also the results of the technical university Berlin