I wonder what the difference is with the well-known Soundman OKM mic series. They are omni's and have several version (SOLO, ROCK, ROCK STUDIO)
http://www.soundman.de/en/products/okm-ii-studio-rock/From the siteThe OKM II Rock Studio is made for extraordinary high sound pressure like hard-rock-music even recorded direct on stage. The Rock-Version is providing a hugh headroom for extrem high sound pressure up to 142 dB.
For OKM II Rock Studio microphones we use Sennheiser capsuls.
technical data sheetdirectional characteristic: omni directional
frequency response: 2o….2o ooo Hz +/- 3dB
sensitivity: 5 mV/Pa +/- 3 dB
-46 dB ref 1V/Pa +/- 3dB
sound field: reversed
max. sound pressure SPL: 132 dB (142 dB, K= 3 % U gr. als 7,5 V, R=18 kOhm)
Equivalent S/N ratio leveldb ( A ), effective 26 dB
peek value ( CCIR 468-2 filter: 39 dB
feeding voltage: 4,5 V…+15 V