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United Studio Technologies UT FET47  From United

Painstakingly recreated with the utmost attention to detail; our take on a very classic and much desired condenser microphone that has been used on countless hit records. Realism and thickness that is true to the vintage sonics — now at an affordable price.

United Studio Technologies


"Experience the Difference"

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Manufacturer's Description from United


It’s a labor of love. The UT FET47 represents several years of R&D, blood, sweat, and tears — all to capture the essence of one of the most beloved and classic solid state condenser microphones, and recreate it for the modern recordist.


The sonic qualities you’ve been chasing have arrived — at an accessible price, with uncompromised quality.The UTFET47 features a custom Cinemag transformer, a custom Heiserman HZ series capsule, vintage polystyrene capacitors, and NOS (new old stock) FETs. Custom parts. Vintage new-old-stock parts. Mix that together with each microphone being built in the USA by actual recording engineers, and you have the UT FET47.



We worked with acclaimed capsule designer and manufacturer Eric Heiserman to develop a commercially produced version of his recently perfected German style dual-backplate K47 capsule. Eric worked with the United team and our capsule manufacturer to faithfully reproduce his capsule. This process required the analysis of everything from the sourced Mylar to the thread types of screws; but after many months and many iterations, we finally achieved what we had hoped for in the HZ Series capsules.


While many of the HZ Series design secrets will remain so, one superior attribute we can reveal is the use of dual, matched backplates. With the HZ Series matching process, a far more accurate and consistent quality from side to side and capsule to capsule is achieved.


The HZ series capsule is still manufactured only a few at a time, stringently listened to, and only are used if they meet both our and Eric’s expectations.




We auditioned many recreations of the original German transformer; but quickly settled on an exceptional offering from Cinemag Transformers in California. Their answer to the classic part is truly a piece of art; a large, hefty transformer made from a ‘striped core’ of interleaved sets of high nickel and steel laminations, and wound to the specs of the original. It‘s humbucking design delivers clean, quiet operation.While we could have used smaller or less expensive transformer; we simply refused to compromise. We believe you’ll be glad we didn’t. This Cinemag transformer was truly everything we could hope for.



Choosing the best microphone for your needs couldn’t be any more difficult these days. With so many options on the market, and so many claiming to have the vintage sound and failing to deliver, it can be overwhelming.


That was our inspiration: deliver the real product: affordably. The UT FET47 represents our true passion for microphones, and was built with a holistic-design approach. With over 50 years of combined industry experiance, we at United have spent years on research and development on this microphone.


We fell in love with a classic all over again, and we can’t wait to hear the recordings you make with it. Check it out at your favorite dealer today!

United Studio Technologies


Type: Condenser Microphone

Capsule: HZ Series 34mm all-brass, dual-backplate K47

Diaphragm: Dual-diaphragm, 6 micron, 24k gold sputtered Mylar (PET film)

Power Supply: +48v Phantom Power (via XLR)

Ground: Pin 1 XLR (required)

Frequency Response:20 Hz - 20 kHz

Polar Pattern: Cardioid

SPL: 136 dB (145 dB w/ Pad) @ <.5% THD

Output Impedance: 200 Ω

Amplifier Type: Field Effect Transistor

Self Noise: <10 dB (no pad, no HPF)

Output: Cinemag USA transformer balanced, pin 2 hot

Body: Nickel electroplated, solid milled brass

High pass filter: 75 Hz (-12dB down point)

Pad: -10dB

Connector: 24k gold plated XLR

Mount: Self-contained stand swivel mount adapter


Height: 210mm / 8.2 in.

Width: 69mm / 2.7 in.

Diameter: 63mm / 2.4 in.