SR40 2018-02-22T15:53:25+00:00


40kHz Cardioid Instrument Microphone

Precision engineered cardioid condenser designed for acoustic string instruments, brass, woodwinds, piano, vocals and drums

  • Extended 40kHz flat frequency response

  • Cardioid polar pattern

  • Handles up to 139dB SPL without distortion

From $999

  • Extended frequency response to 40kHz
  • Multi-purpose directional microphone
  • More gain before feedback than other microphones
  • Less leakage
  • Textbook perfect cardioid polar pattern with natural on and off-axis performance
  • Provides excellent results for both live performance and recording applications
  • Extreme accuracy in the time domain for faithful reproduction and no smearing or distortion
  • Transparent sound quality
  • Shorter diaphragm settling time to prevent quieter attacks from being blurred by earlier louder attacks
  • 150Hz – 40kHz frequency response, revealing subtleties in the sound that are non-existent from microphones with less high frequency range, and enabling musical performances to exhibit greater depth and realism
  • The exceptional rear rejection performance enables the SR40 to easily isolate instruments in a recording or live performance setting, thus minimizing acoustic bleed

Frequency Response: 100Hz to 40kHz

Polar Pattern: Cardioid

Sensitivity: 20mV/Pa (-34dBV/Pa)

Power Requirements: 24-48V Phantom, 10mA

Max Acoustic Input: 139dB SPL

Output: Male XLR-3 balanced (pin 2+)

Output Impedance: 65Ω balanced (between pins 2 & 3)

Min Output Load: 600Ω between pins 2 & 3

Noise: 16dB SPL equivalent (A weighted)

Dimensions L x D: 250mm x x 22mm (9.84 x .860 inches)

Weight: .5 lb (225g)

SR40 40kHz multi-purpose cardioid condenser microphone

SR40mp 40kHz multi-purpose cardioid condenser microphone – matched pair

SR40/HC 40kHz multi-purpose hypercardioid condenser microphone

SR40/HCmp 40kHz multi-purpose hypercardioid condenser microphone – matched pair


  • Acoustic String Instruments
  • Bass Amp
  • Brass/Woodwinds
  • Choir
  • Drums/Percussion
  • Guitar Amp
  • Live Vocals
  • Piano
  • Studio Vocals
  • Mc1 Microphone Clip
  • SRW4 Foam Windscreen


Additional Accessories Available

  • SRW1 Black Aluminum Windscreen




“The Earthworks SR40 has a very natural sound; it’s a clean and very articulate microphone.”



“Stringed acoustic instruments and percussion with the SR40 delivered equally pleasing results and, with the matched stereo pair, spacious and wide imaging was easily achieved.”


The off-axis sound is every bit as clear as the direct signal.

Simon Tillbrook, ProSoundNetwork

The Earthworks SR40 has a very natural sound; it’s a clean and very articulate microphone.

Dave Martin, Recording