SD C Cardioid capsule | Cardioid pattern with a nice, flat frequency response for a true and neutral sound.
A very typical SD capsule, probably the one you'll use most often. Straight cardioids pattern with nice, flat frequency response with only minimal treble peak, giving a very true and neutral sound with just enough reach and directionality for most jobs. The proximity effect is totally predictable. Voiced between the darker KM-84 and the bright Schoeps CMC6
SD H Hyper Cardioid Capsule | A more directional version of the Cardioid capsule, with more proximity effect. The treble response is still very realistic and to some people, will actually sound more "real" than the cardioid.
SD O Omni | two types
Diffuse Field response: to be used when a relatively flat treble is required off axis, for instance when the sound of the room needs to be accurately represented (darker source). Free Field response: to be used when a relatively flat treble is required on axis, for instance when the source needs to be accurately represented (darker room sound).