ELA M 251T

TELEFUNKEN Elektroakustik introduces the new ELA M 251T, a microphone featuring the newly developed CK-13™ capsule. While based upon the classic ELA M 251 models, the ELA M 251T adds a very modern twist. 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.

Sonic Characteristic

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, the capsule that provides greater accuracy in the low frequency range by attaining a higher damping factor to the motion of the membrane. 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 frequencies. 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.

Circuit Design

The TELEFUNKEN ELA M 251T includes an edge terminated, dual backplate CK13 capsule, a variation of the traditional CK12. The 251T is capable of cardioid, omnidirectional and bidirectional polar patterns, just like the ELA M 251E. The amplifier circuit features a premium New Old Stock ECC801S vacuum tube and a Haufe T14/1 output transformer, the same found in the 251E and C12.


Though the 251T shares the same basic vintage-accurate construction of the 251E, it is wrapped in a sleek sulfamate nickel-plated finish to reflect the proprietary capsule technology.


Each ELA M 251T microphone comes complete with M 950T power supply, M 850T 25' Sommer tube microphone cable, Rycote shockmount, FC50 locking flight case and WB50 wooden microphone box.

Technical Specifications


Pressure Gradient Condenser


CK13 - 25mm Dual Sided Alloy 2213 Sputtered Membrane

Tube Type



Haufe T14/1

Polar Pattern

Cardioid, Omnidirectional, and Bidirectional

Frequency Range

20Hz - 20kHz, ± 3 dB


11.5 mV/Pa, ± 1 dB

THD at 1kHZ at 1Pa (Amplifier)


Output Impedance

200 Ω

Maximum SPL (for 1% THD)

132 dB

S/N Ratio


Self Noise (Amplifier)



216 mm L x 50 mm Dia


596 g

Current Draw from Mains

80 mA

Power Supply

M 950T - 7 Pin Female XLR Input, 3 Pin Male XLR Output


M 850T - 25 ft Sommer Cable, Vintage Compatible 6 Pin Female Stand Mount, 7 Pin Male XLR

Wooden Box


Flight Case

FC50 - Vintage Style Locking Combination Flight Case, FC50S for Stereo Set

Photo Gallery

Video Gallery

Press Releases

Nathan Pacheco and Leo-Z Choose New TELEFUNKEN 251T

By Alan | August 19, 2011

Rising Pop/Operatic Star Shines in New Disney Pearl Album Pictured is Nathan Pecheco with TELEFUNKEN’S new ELA M251T at EASTWEST Recording Studios in Hollywood.  Photo by David Goggin. Hollywood, CA, August, 2011 – Rising pop/operatic star Nathan Pacheco and producer/composer Leo-Z picked the new TELEFUNKEN Elektroakustik ELA M 251T large diaphragm, vintage tube, condenser microphone…