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CardioidEarthworks Audio P30/C

Cardioid Condenser Microphone

The P30/C is one of the two microphones in Earthworks’ Periscope™ series. It is essentially an SR30 Cardioid condenser, with the SR30’s tapered body replaced by a 4-inch gooseneck.

The adjustable neck allows the mic’s capsule to be easily positioned in tight or hard-to-reach spaces, such as under the strings of an acoustic bass.

The P30/C shares the SR30’s flat, extended frequency response (30Hz–30kHz at 6 inches) and the fast transient response that is the hallmark of Earthworks’ “High Definition” microphones.

The mic’s impedance conversion circuitry is transformerless, with relatively high current draw (10mA) and self-noise (22dBA) — although for close-miked applications, the self-noise is unlikely to be audible.

Like many of Earthworks’ mics, the P30/C is covered by Patent US6091829, which describes the use of a conical element behind the capsule to alter the capsule’s frequency response and, presumably, improve its Cardioid pattern control.

Permalink: Earthworks Audio P30-C


Pickup Patterns Pads & Filters
Cardioid (10 mV/Pa; 30 - 30,000 Hz)
Capsule Dimensions Impedance SPL/Noise
Capsule diameter: 9mm
100 Ohms (Low) Max SPL: 145 dB
Self-noise: 22.0 dB(A)
Weight Length Max Diameter Interface(s)
n/a 275mm (10.83'') 22mm (0.87'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48v

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