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CardioidApex Electronics 540

Cardioid Condenser Microphone

The Apex 540 is a large-diaphragm FET condenser with a fixed Cardioid polar pattern.

It is described as a “low self noise” design, yet its self noise figure is not published.

Its sensitivity is cited as 13mV/Pa on the Apex website, or 21mV/Pa in the mic’s datasheet.

The 540 ships with an aluminum case, a foam windscreen and “cradle” shockmount.

This profile will be updated as more info becomes available.

Permalink: Apex Electronics 540

The mic was released in 2011.


Pickup Patterns Pads & Filters
Cardioid (21 mV/Pa; 20 - 20,000 Hz)
Capsule Dimensions Impedance SPL/Noise
Diameter n/a
200 Ohms (Low) Max SPL: 126 dB
Weight Length Max Diameter Interface(s)
494g (17.43oz) 145mm (5.71'') 55mm (2.17'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48v

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