United UT Twin48 - Twin Circuit Tube-Condenser Microphone
The UT Twin48 is an exceptional preservation of two venerable classic tube microphone designs. The original classics of the late ‘40s and ‘50s have been front and center in countless recordings — and demand for them is higher than ever! United has taken these classic-specification designs to the next level by uniting both designs into a single microphone.
Massive tube sound calls for the right tube: The UT Twin48’s amplifier stage is based around a select new old stock EF86 pentode glass vacuum tube — the last living descendent of the originals’ tube. This results in a bold, rich sound, due to the pentode’s harmonic profile being much different than modern dual-triode tubes. These legendary microphones, still inspiring after generations, are now available in both of their original forms in the UT Twin48.
The classic 47 and 48-style mics each derived their cardioid operation in very different ways — producing subtle tone differences as well as a slightly different polar pattern. For the first time ever, the UT Twin48 delivers both options in a single microphone.
47 Mode offers both 47 Cardioid and Omni patterns, while 48 Mode offers 48 Cardioid and Figure-of-8. Each cardioid mode delivers a different tonal flavor and performance:
- 47 Cardioid: de-couples the rear diaphragm in a process known as True Cardioid, for a louder sound with improved sensitivity with more background and top-end detail.
- 48 Cardioid: polarizes the rear diaphragm with the same voltage as the backplate — AKA Active Cardioid — for a more tightly closed-in, warmer, intimate tone that is a bit lower in sensitivity.
United UT Twin48 - Twin Circuit Tube-Condenser Microphone
- Type: Condenser Microphone
- Diaphragm: 6 micron, 24k gold sputtered Mylar (PET film)
- Capsule: UT Series, 34 mm brass, single backplate K48
- Frequency response: 20 Hz - 20 kHz
- SPL: 137dB @ 0.5% THD
- Polar Pattern: 47 Cardioid, 48 Cardioid, 47 Omni, 48 Figure-of-8
- Output Impedance: 35 Ω
- Output Connector: 24k gold plated 3 pin XLR, pin 2 HOT, pin 1 GND
- Amplifier Type: Vacuum tube
- Tube: NOS selected EF86 pentode vacuum tube
- Self noise: 11 dBA
- Output: Custom-wound UT Series transformer, made in USA
- Body: Nickel electroplated, solid milled brass
- Mount: Suspension type shock mount (included)
- Interconnect: Custom Sommer 7 conductor XLR cable 6 m / 19.7’
- Power Connector: IEC320 3-conductor receptacle
- Power Input: 110-120 vAC or 220-240 vAC; switch selectable
- Dimensions – Microphone: Height: 26.5 cm / 10″ Diameter: 6.25 cm / 2.5″ / Shockmount Depth: 16 cm / 6″
- Dimensions - Power Supply: Height: 9.25 cm / 3.25″ Width: 19.5 cm / 7.5″ Depth: 18 cm / 7″
- Dimensions - Briefcase: Height: 17 cm / 6.75” Width: 50 cm / 19.75″ Depth: 32 cm / 12.75″
