Telefunken AR-70 Stereo The AR-70 is an advanced stereo version of the popular AR-51 tube condenser microphone, capable of X/Y, Mid-Side and dual mono recording configurations. Sonic Characteristic The AR-70 Stereo features a matched pair of large diaphragm dual sided TK51D capsules (the same newly implemented edge-terminated type 26.5 mm dual-membrane design) found in the [...]