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Sterling Audio ST33 FET

Pricing & Availability

  • MSRP: $499


ST33 FET Documentation

CardioidSterling Audio ST33 FET

Cardioid Pencil Condenser Microphone

The Sterling ST33 is a medium-diaphragm pencil condenser with cardioid pattern and solid-state circuitry.

The mic body is nickel-plated brass with black finish. The head and grille are stainless steel.

A 12dB/Octave high pass filter at 75 Hz is switchable on the mic body. A second switch activates a -15dB attenuation pad.

This Class-A FET mic is based on the Groove Tubes GT-33. Unlike the GT-33, the mic does not have swappable capsules.

ST33 FETThe mic ships in a padded flightcase with an elastic shockmount (p/n HM-1).

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The mic was released in 2006.


Pickup Patterns Pads & Filters
Cardioid (26 mV/Pa; 20 - 18,000 Hz)
  • Pad: -15dB Pad (Via Switch)
  • Filter: 75 Hz HPF 12dB/Oct (Via Switch)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 19mm
Diaphragm gauge: 6 microns
200 Ohms (Low) Max SPL: 155 dB
Self-noise: 20.0 dB(A)
Weight Length Max Diameter Interface(s)
235g (8.29oz) 187mm (7.36'') 30mm (1.18'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48v

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