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CAD Audio C400S

Pricing & Availability

  • MSRP: n/a
  • Discontinued


C400S Documentation

CardioidCAD Audio C400S

Cardioid Condenser Microphone

The C400S is a Cardioid condenser microphone with a transformer-based circuit. It is very similar to the Apex 430 and the original Nady SCM-900; the circuit boards and capsule designs of these three mics are nearly identical.

C400S CircuitA pushbutton switch on the PCB enables a high-pass filter (-6dB/octave @ 100Hz).

The capsule is a 32mm K67 type, common to most low-cost condenser microphones.

The mic’s rated noise floor, 26dBA, places it among the noisiest microphones we’ve seen. To be fair, however, at the time this mic was manufactured, 26dBA was not remarkably high; microphone construction techniques and component quality have improved in the past 10 years, to the point where modern condensers are commonly rated between 4–15dBA.

Permalink: CAD Audio C400S


Pickup Patterns Pads & Filters
Cardioid (11.9 mV/Pa; 30 - 16,000 Hz)
  • Filter: HPF: -6dB/octave @ 100Hz (Via Switch)
Capsule Dimensions Impedance SPL/Noise
Diameter n/a
200 Ohms (Low) Self-noise: 26.0 dB(A)
Weight Length Max Diameter Interface(s)
510g (17.99oz) 198mm (7.80'') 54mm (2.13'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48v

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