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9 polar patternsKarma Audio K58

Multi-Pattern Tube Condenser Microphone

The Karma K-58 is an multipattern tube microphone, with a 9-way pattern control switch on the power supply.

The tube is a 12AX7 dual-triode. Numerous owners of the K58 have reported that the mic responds well to tube swaps (specifically, to a higher-grade 12AX7).

Switches on the back of the microphone provide access to a -10dB pad and a high-pass filter (-12dB/octave @ 75Hz).

Like most of the Karma microphones, the mic body is wrapped in a distinctive black leather-like material.

K58 Power SupplyThe mic ships with a heavy-duty shockmount, switchable power supply (110/220V), 7-pin cable, and a flight case.

The Karma Audio K58 is also known as: K-58.


Pickup Patterns Pads & Filters
Omnidirectional (25 mV/Pa; 20 - 20,000 Hz)
Cardioid (25 mV/Pa; 20 - 20,000 Hz)
Bidirectional (25 mV/Pa; 20 - 20,000 Hz)
  • Pad: -10dB (Via Switch)
  • Filter: HPF: -12dB/octave @ 75Hz (Via Switch)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 27mm
n/a Self-noise: 23.0 dB(A)
Weight Length Max Diameter Interface(s)
n/a n/a n/a
  • 3-pin XLR male (1)
Power Specifications
  • Includes tube power supply

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