United Studio Technologies Ut Tube 67

A "67" Heritage Reinvented by United

The UT Tube67 is United's tribute to the venerable German tube microphones of the 67 style that have shaped recordings since the 1960s. Rather than a simple copy, United has refined every component to reconnect with the original grain, thickness, and smoothness, while lowering noise and mastering sensitivity to modern interference.

Designed for Vocals, Music, and Room Ambience Capture

With its linear response across all polar patterns and a maximum SPL of 137 dB at 0.5% THD, the UT Tube67 excels equally in lead vocals, backing vocals, acoustic instruments, brass/woodwinds, piano, drums, and guitars. Its warm texture and "silky" highs make it a natural choice for professional studios, discerning musicians, and voice-over artists.

Key Technologies and Innovations for Contemporary Recording

UT K67 "Custom" Capsule

Inspired by a late 1970s model, the 34 mm double-diaphragm capsule is coated with 24-carat gold on 6-micron mylar in a cleanroom, then optimized for the microphone's operating voltage. The result: natural low-mids and smooth highs without the resonance often heard in modern reissues.

Shielded UT-BV12 Transformer

Wound in the USA according to measurements from an original example, the UT-BV12 uses high-nickel laminations and a copper Faraday shield. It guarantees exemplary precision in the low end and repels RFI, without compromise on size or quality.

EF86 NOS Tube and Refined Tube Stage

The NOS EF86 pentode provides a dense grain and fluid dynamics. Paired with a high-performance regulated power supply and a 7-pin Sommer interconnection, it ensures stability, silent operation, and longevity.

Switchable Air Mod

A subtle high-frequency boost to bring out vocal presence and detail while smoothing transient peaks in the highs. Activatable on demand to adapt the microphone's color to the context.

Technical specifications

Frequency response	20 Hz - 20 kHz	Capsule	Large Diaphragm
Category	studio microphone	Connection	XLR
Directivity	omnidirectional, cardioid, bidirectional	Color	Black

Type	Large diaphragm tube condenser microphone	Self-noise	<11 dB
Amplifier type	Vacuum tube	Output impedance	38 Ohms
Tube	Selected NOS EF86 pentode	Interconnection	Custom 7-conductor Sommer XLR cable, 6 m
Diaphragm	6 microns, PET (mylar) film plated with 24-carat gold	Power supply	110-120 VAC or 220-240 VAC; selectable via switch
Output	Custom-wound UT series transformer (UT-BV12), made in the USA	Power connector	3-pin IEC320 socket
Polar patterns	Cardioid, omnidirectional, and bidirectional	Body	Solid brass machined, nickel electroplated / satin black paint
Pad	-10 dB	Mounting	Shock mount suspension type (included)
High-pass filter	80 Hz (slope -12 dB/octave)	Microphone	244 x 60 mm
Air Mod mode	slight high-frequency boost, smooths transient peaks	Power supply (with feet)	171 x 143 x 60 mm
Maximum SPL	137 dB @ 0.5% THD	Shock mount	183 x 119 mm