Telefunken M61 Omni Tri-Mono Set Small Diaphragm Omnidirectional Microphone Set

The M61 Omni TRI-MONO Set includes:
(3x) M60 FET microphone amplifiers
(3x) TK61 Omnidirectional capsules
(3x) SD40 Diffusion Spheres
(3x) SGMC-5R XLR cables
(3x) M761 Elastic Shock Mounts
ZC63 Zipper Carrying Case

The M61 is a re-interpretation of the classic FET mic amplifier featuring carefully selected and tested components that are hand-plugged into gold-plated circuit board. The output is matched with a custom American-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 M61 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 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 3x 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 M50's capsule assembly. TELEFUNKEN Elektroakustik has created removable diffuse field spheres as an accessory for the small diaphragm M61 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 by the microphone.

Key Features

• Punchy tone with extended high frequency clarity and low frequency definition
• Ultra fast transient response and extended frequency range
• High headroom, low-noise phantom-powered FET amplifier
• Designed and hand assembled in the USA
• Recommended Applications
• Acoustic Guitar, Drums, Percussion, Live Sound

Technical Specifications

Type
FET Condenser
Polar Pattern
Cardioid, Omnidirectional, Hypercardioid
Frequency Range
20 Hz – 20 kHz, ±3 dB
Power Source
+48V Phantom Power
Transformer
TELEFUNKEN Elektroakustik T61CT
Sensitivity
8.6 mV/Pa, ±1 dB
THD at 1kHZ at 1Pa (Amplifier)
< 0.01%
Output Impedance
120 Ω
Maximum SPL (for 1% THD)
> 130 dB
S/N Ratio
89 dBA
Self Noise (Amplifier)
5 dBA
Dimensions
140 mm L x 20 mm Dia
Weight
110 g