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OmnidirectionalCardioidBidirectionalSterling Audio ST59 FET

Multi-Pattern Condenser Microphone

The Sterling ST59 is a multipattern FET condenser with a transformer-coupled output.

The features for the ST59 and Groove Tubes GT57 are identical, as are the published specs for sensitivity and self-noise. However, the microphones are not identical; the bodies and grilles differ, and the ST59 has a flatter frequency response.

Like most of the Groove Tubes and Sterling LDCs, the ST59 uses a 32mm brass capsule with Aspen Pittman’s disk resonator diaphragm design. Sterling capsules are baked to remove residual moisture, helping the capsules’ stability over time.

ST59 FET, rear sideSwitches on the front of the mic enable a -10dB pad and High Pass Filter (75Hz, 12dB/Octave). A switch on the rear of the mic body allows selection of Cardioid, Omni, or Figure-8 polar patterns.

The mic body is made from brass with stainless steel head and grille.

The ST59 ships with a hardmount (p/n HM-2) and a zippered storage pouch. The SM-4 elastic shockmount is available separately.

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Specifications

Frequency Response - OmnidirectionalClick Graph to Compare!
ST59 FET Omnidirectional Frequency Response Chart
Frequency Response - CardioidClick Graph to Compare!
ST59 FET Cardioid Frequency Response Chart
Frequency Response - BidirectionalClick Graph to Compare!
ST59 FET Bidirectional Frequency Response Chart
Pickup Patterns Pads & Filters
Omnidirectional (32 mV/Pa; 20 - 18,000 Hz)
Cardioid (32 mV/Pa; 20 - 18,000 Hz)
Bidirectional (32 mV/Pa; 20 - 18,000 Hz)
  • Pad: -10dB Pad (Via Switch)
  • Filter: HPF: -12dB/octave @ 75 Hz (Via Switch)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 26mm
Capsule diameter: 32mm
Diaphragm gauge: 3 microns
200 Ohms (Low) Max SPL: 144 dB
Self-noise: 22.0 dB(A)
Weight Length Max Diameter Interface(s)
680g (23.99oz) 190mm (7.48'') 46mm (1.81'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48v

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