At this year's AES in New York, AKG launched the new CK77WR, improving on the original design of the CK77 - the smallest dual-diaphragm microphone in the world, the WR version is now Perspiration proof and water resistant. The original design of the CK77 had a tiny hole in the diaphragm which provided the necessary pressure compensation. This however posed a potential risk that liquids might penetrate into the capsule and cause a short circuit. Now the Barometric pressure is compensated by a capillary tube that is connected to a compensation cavity sealed with a soft, flexible diaphragm. The patent pending new technology ensures pressure compensation, although the capsule is absolutely tight.
