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TELEFUNKEN Introduces New TK51D Capsule for AR-51 and AR-70 Mics

Dual-Membrane Edge-Terminated Capsule Extends Lows and Highs

Pictured (L-R) is the original TK67 capsule, the new TK51D edge-terminated capsule, and the stereo AR-70 with the new capsule.

TELEFUNKEN Elektroakustik of South Windsor, CT, has introduced the new TK51D capsule for its popular AR-51 and stereo AR-70 microphones from their affordably priced R-F-T line of large diaphragm tube microphones.

This new dual-membrane edge-terminated CK12-like capsule offers a larger surface area than the original TK67 capsule, resulting in a frequency response with an extended low end and a smoother, open high end. The new TK51D capsule brings the AR-51 and AR-70 sonically closer to the ELA M 251E, C12, and C24 microphones.

The AR-51 and stereo AR-70 microphones are designed in the tradition of the classic mics of the past, utilizing the same circuit design as the classic TELEFUNKEN ELA M 251E, making it suitable for any recording studio, from major World Class facilities to voiceover rooms and home project studios. The AR-51 and stereo AR-70 utilize vintage New Old Stock (NOS) tubes that have been rigidly tested for noise and microphonics.

Starting October 2012, all newly manufactured AR-51 (serial # 760 and above) and AR-70 Stereo (serial # 026 and above) microphones will ship from the lab with the new TK51D capsule. Owners of original AR-51 and AR-70 Stereo microphones interested in the new capsule design are eligible to swap out the original TK67D for the alternative TK51D for $199 ($349 for the AR-70) plus return shipping. This price includes the cost of the new capsule and mounting hardware, as well as the labor to install, retest, and calibrate the microphone for optimal performance.

For specific questions about the new capsule and replacement
email: [email protected].

To learn more about TELEFUNKEN Elektroakustik, visit:

About TELEFUNKEN Elektroakustik
TELEFUNKEN Elektroakustik produces a comprehensive line of fine microphones, ranging from meticulously engineered replicas of historic vintage microphones handcrafted in the USA, to the R-F-T series of microphones that take advantage of the globalization of technology, as well as innovative dynamic microphones for live and studio performance.