M61 FET Omnidirectional

The M61 FET Omnidirectional package includes one M60 amplifier paired with a TK61 omnidirectional polar pattern capsule.  The TK61 features a 6-micron gold-sputtered membrane measuring 15mm in diameter, and offers a large, open sound perfect for capturing the ambience and vibe of your instrument or recording environment to breathe life into any recording. The frequency response is flat from 20 Hz to 5 kHz, with a smooth, airy presence peak at 8 kHz.

Sonic Characteristic

The M60 FET’s incredibly quick transient response captures nuances and subtleties with impressive precision and clarity. This results in an extremely detailed sonic image with definition and presence, perfectly suited for the complex character of stringed instruments and percussive sources.

Circuit Design

Utilizing a unique proprietary circuit topology, this re-interpretation of the classic FET mic amplifier produces an exceptional transient response and SPL handling capabilities. Carefully selected and tested components are hand-plugged into gold-plated circuit board traces to provide an ultra-clean true Class A discrete amplifier with a frequency response of +/- 2dB from 20 Hz to 50 kHz. 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 M60 FET amplifier body is finished in a durable, lightly textured black powder coat adorned with the historic TELEFUNKEN diamond badge. The microphone’s XLR connector shell complements the look with a matte black nickel plated finish engraved with the model and serial number. The TK6x capsules feature a bright nickel plated enclosure with a fine gold mesh pattern.


The M61 FET Omnidirectional system ships complete with a SGMC-5R 5-meter XLR cable with right angle female connector, M761 elastic shock mount, and a foam windscreen, all packed in an ZC61 zipper carrying case.

Technical Specifications


Pressure Gradient Condenser


TK61 - 15 mm Edge Terminated Diaphragm

Tube Type

Active FET Transistor (No Vacuum Tube)



Polar Pattern


Frequency Range

20 Hz - 31.5 kHz, ± 2 dB (Amplifier)


8.6 mV/PA, ± 1db

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


140 mm L x 21 mm Dia


110 g

Current Draw

2 mA

Power Requirements

+48 VDC Phantom Power


SGMC-5R - 5 Meter (16.9 ft) Cable, Right Angle Female 3 Pin XLR, 3 Pin Male XLR


M 961 - Suspended Elastic Mount

Flight Case

ZC61 - Soft Foam Zip Case, ZC62 for Stereo Set

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