RN17 Factory-Matched Stereo Pair When purchased as a pair, the transformers and cardioid capsules are factory-matched for perfect tolerance, guaranteeing the best possible stereo image. This configuration also includes a precision stereo mounting bar, two shock mounts, a wooden presentation case, and empty canisters for future capsule additions. The whole setup comes packaged inside a secure flight case. Designed with Mr. Rupert Neve, the RN17 redefines the capabilities of an SDC. This is the world's first pencil microphone with a large-scale, hand-wound, ultra high performance transformer. The second product of the sE / Rupert Neve collaboration, work on the RN17 began with a discussion between Rupert and Siwei Zou on the merits and problems of small-diaphragm condensers.