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Bock Audio iFet

Pricing & Availability

  • MSRP: n/a


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iFet Documentation

CardioidBock Audio iFet

Cardioid Condenser Microphone

The Bock Audio iFet is a reincarnation of the Soundelux iFet7, a unique dual-voiced FET condenser.

The mic’s “I” (or Instrument) mode was designed by David Bock as a modern interpretation of the Neumann fet47. This circuit is described as utilizing “one FET and four transistors,” and an oversized output transformer.

The “V” (voice) mode enables a circuit based on the KM84. This circuit provides 4dB higher sensitivity, which is appropriate given its intended use for vocal applications. (The Soundelux version of this mic described the “V” mode as a “warmer, less sterile 87fet” sound.)

Presumably the same output transformer is used for both circuits (confirmation forthcoming).

The new Bock iFet is not identical to the original Soundelux model. David Bock has described the following differences:

  • The mounting arm has been improved.
  • The base is made of aluminum rather than brass, which lowers the weight and allows the arm to hold the mic’s position more securely.
  • The low frequency response of both modes has been extended.

Permalink: Bock Audio ifet

The mic was released in 2012.


Pickup Patterns Pads & Filters
Cardioid (n/a mV/Pa; n/a)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 25mm
Weight Length Max Diameter Interface(s)
n/a n/a 60mm (2.36'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power

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