"The rear side of every Braunmuhl-Weber style (dual diaphragm, large diameter) capsule, including the K47 and CK12 styles, is part of the sound of the front side. If you were to change the rear side of the CK-12 to anything else, the front wouldn¡¯t sound like a CK-12 any more. The same applies to the K47. "
One of the consequences would be that the patterns that combine both capsules would not behave as expected, with lobes happenning where the capsules have different response. I'm not sure of the severity of the consequences, but it needs to be considered.
