TELEFUNKEN Introduces Tri-Mono Mic Systems at AES 2023

TELEFUNKEN Elektroakustik is introducing at AES 2023 two new small diaphragm system configurations, the M60 Deluxe Tri-Mono, and the M61 Omni Tri-Mono. Each system features three matched M60 FET microphones with TK61 omni capsules and 40mm diffuse field spheres. The M60 Deluxe TRI-MONO Set also includes three matched TK60 Cardioid capsules.

TELEFUNKEN M61 FET microphone with 40mm diffuse field sphere.

TELEFUNKEN's three-microphone sets are capable of matched stereo and Decca-tree recording configurations. In combination with additional matched pairs, the configuration is ideal for multi-channel immersive audio capture. 

The M60 amplifier, utilizing a unique proprietary circuit topology, produces an exceptional transient response and SPL handling capabilities.  This ultra clean true Class A discrete amplifier with a frequency response of +/- 2dB from 20Hz to 50KHz, is ideal for classical or orchestral recording, in both small and large performance areas.

The M60 is a re-interpretation of the classic FET mic amplifier, featuring carefully selected and tested components that are hand-plugged into gold-plated circuit boards. The output is matched with a custom US-made transformer that offers an especially low self-noise and a typical THD+N of 0.015% or better, making it ideal for critical recording applications.

The three-microphone Decca tree configuration that was made famous with classical music recordings in the 1950s featured three M50 omni microphones positioned in a reverse "T" shape, most often located over the conductor's head. The most common Decca Tree setup employs three 1-meter bars from which the microphones hang in a triangle configuration; though larger and smaller bar sets can be used.

The capsule assembly of the historic M50 featured a 40mm acrylic sphere which was actually a "diffuse field sphere" built into the microphones capsule assembly. TELEFUNKEN Elektroakustik has created removable diffuse field spheres as an accessory for the small diaphragm M60 FET and ELA M 260 tube microphones. 

The addition of a diffuse field sphere is the most organic way to combat both effects; reducing the loss of high frequencies as well as minimizing the reverberant information. The sphere is an accessory that attaches to the capsule end of the microphone, which effectively makes the microphone's diaphragm part of the sphere as the sphere changes the shape of the transduction capsule. The result is a gradual and smooth rise in upper midrange and high frequency information captured on axis by the microphone.

Visit the 2023 Audio Engineering Society Convention happening October 25th thru27th at the Javit's Center in New York City. The complete TELEFUNKEN product line will be on display in Booth #421.