Ela M 251T
That twist is the implementation of Alloy 2213™ as the diaphragm membrane material for the CK-13™ capsule. Alloy 2213™ is an amalgam of Titanium and Aluminum, which was originally developed for the aerospace industry.
Traditionally gold has been sputtered onto Mylar™ for the diaphragms of the historic CK-12 capsule. By employing Alloy 2213™, which is far more rigid than gold, Telefunken Elektroakustik has developed a capsule that provides greater accuracy in the low frequency ranges of the audio spectrum by attaining a higher damping factor to the motion of the membrane.
Telefunken Elektroakustik CK-13 Capsule
Alloy 2213™ is lighter than gold, and when combined with the edge terminated CK-12 system provides an "airy" and "delicate" representation of the upper ranges of the audio spectrum. This affords the user a higher degree of detail in the recorded sound while still providing the depth of audio for which ELA M 251 microphones have been associated for decades.
After extensive R&D, the perfect diaphragm tuning and fabrication was achieved, resulting in a microphone capsule that can better withstand moisture, smoke, and extreme volume, thus requiring less maintenance over the years, and provides the user a superior capture of the sound to be recorded.
The amplifier is the same as the ELA M 251 E which features a New Old Stock [NOS] Telefunken 6072a tube, a European-made output transformer, but also can be fitted to the ELA M 251 amplifier which is fitted with a NOS Telefunken AC-701 tube. The CK-13™ capsule assembly will also be available through regular distribution channels for aftermarket retro-fit to all Telefunken Elektroakustik ELA M 250 and 251 models both new and vintage.
The ELA M 251T also sheds the classic mint green body color of the ELA M 250, 250E, 251 251E & ELA M 270 in favor of a sleek sulfamate nickel-plated finish to reflect the proprietary capsule technology. The ELA M 251 T System comes complete with capsule, amplifier, power supply, and 4-year warranty. Included in the package is a stand-mount cable connector, ruggedly-built power supply, wooden microphone box, and a classic leather bound locking tweed flight case.