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OmnidirectionalCardioidHypercardioidSterling Audio ST44 Tube

Detachable-Capsule Tube Condenser Microphone

The ST44 is a small-diaphragm tube condenser. It appears to be identical to the Groove Tubes GT-44, with the exception that the GT-44 had interchangeable capsules, whereas the ST44 is a fixed Cardioid microphone.

ST44 CircuitBoth microphones use 6-micron, 19mm capsules, subminiature GT6205 pentode tubes, and nickel-plated brass bodies. Both incorporate a switchable high-pass filter and a -15dB pad.

The ST44 employs a hybrid impedance circuit, with a FET front end followed by the pentode tube. The microphone uses an output transformer.

The ST44 ships with its power supply, both power and audio cables, the SM3 shockmount, and a compact aluminum case for the microphone.

According to Sterling Audio, the ST44 was discontinued in 2012.

Permalink: Sterling Audio ST44

Specifications

Compatible Capsules
Groove Tubes C1 CardioidCardioid Groove Tubes C1 Cardioid
19mm Cardioid capsule
Sensitivity: 28 mV/Pa
Freq. Resp.: 20 - 20,000 Hz
MSRP: $99 | discontinued
Groove Tubes C2 HyperHypercardioid Groove Tubes C2 Hyper
19mm Hypercardioid capsule
Sensitivity: 28 mV/Pa
Freq. Resp.: 20 - 20,000 Hz
MSRP: $99 | discontinued
Groove Tubes C3 OmniOmnidirectional Groove Tubes C3 Omni
19mm Omnidirectional capsule
Sensitivity: 28 mV/Pa
Freq. Resp.: 20 - 20,000 Hz
MSRP: $99 | discontinued
Sterling Audio ST44 CardioidOmnidirectional Sterling Audio ST44 Cardioid
19mm Omnidirectional capsule
Sensitivity: 28 mV/Pa
Freq. Resp.: 20 - 20,000 Hz
MSRP: n/a | Still In Production
Pads & Filters Impedance SPL/Noise
Diaphragm diameter: 19mm
Capsule diameter: 21mm
Diaphragm gauge: 6 microns
200 Ohms (Low) Max SPL: 145 dB
Self-noise: 20.0 dB(A)
Weight Length Max Diameter Interface(s)
n/a 187mm (7.36'') 28mm (1.10'')
  • 3-pin XLR male (1)
Power Specifications
  • Includes tube power supply

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