Earthworks SR40-MP
Matched Pair of SR40 Cardioid Small Diaphragm Condenser High Definition Microphone, 30Hz-40kHz


This matched pair of SR40 microphones comes in a custom handcrafted wooden box.

The SR40 40kHz High Definition Microphone offers an extended high frequency response, extremely fast impulse response, short diaphragm settling time, exceptional cardioid polar pattern, and high rejection of sounds from the rear of the micorphone. It is intended for a wide range of applications, ranging from drum overheads to micing a guitar cabinet, or as a solo microphone.

The excellent performance characteristics of the SR40 allow it to be utilized for a very wide range of applications. In the studio or on the stage the SR40 is an ideal choice for a variety of instruments including sax, flute, trumpet, guitar, piano, and percussion. It is superior for vocals or choir because it doesn't spotlight. Rather, it uniformly picks up an entire section. The SR40 is popular among concert tapers because of its open uncolored sound and among jazz enthusiasts for its ability to capture explosive performances while retaining the subtle nuances of artistic expression.

The SR40 offers a 30Hz-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. Equally significant, the SR40 offers an extremely fast impulse response that enables the microphone to acquire fast transients far more accurately. The exceptionally short diaphragm setting time allows the SR40 to reveal subtle low level nuances in sound that other microphones mask. The SR40's near-perfect cardioid polar pattern ensures that the microphone will not beam or spotlight and provides significantly more gain before feedback than conventional microphones. The polar response also enables vocalists or instruments at the sides of the microphone (at 45- or 90-degrees) to have the same pristine sound quality as those at the front of the microphone, and in addition, it facilitates the use of fewer microphones with closer placement to the source, enabling yet additional gain before feedback in live sound applications. The SR40's high SPL handling and rear rejection are additional noteworthy attributes. With an acoustic input rating of 145dB SPL, the new SR40 is a first-rate performer when it comes to capturing loud sound sources. Be it a guitar cabinet or a close miced trumpet or saxophone, the SR40 is ideally suited to handle challenging instruments. Similarly, the exceptional rear rejection performance enables the SR40 to easier isolate instruments in a recording or live performance setting, thus minimizing acoustic bleed.


  • High Definition Microphone
  • 30Hz to 40kHz frequency response
  • Hear detail that other microphones miss
  • Uniform frequency response at 0°, 45° & 90°
  • 145dB SPL max acoustic input
  • More gain before feedback
  • Exceptional rejection of sounds from the rear


  • Frequency Response: 30Hz to 40kHz +/-2dB @ 6"
  • Polar Pattern: Cardioid
  • Sensitivity: 10mV/Pa (-40dBV/Pa)
  • Power Requirements: 48V phantom, 10mA
  • Max Acoustic Input: 145dB SPL
  • Output: XLR (pin 2+)
  • Output Impedance: 100 ohms, balanced (50 ohms ea. pin 2 & 3)
  • Min Output Load: 600 ohms between pins 2 & 3
  • Noise: 22dB SPL equivalent (A weighted)
  • Dimensions (L x D): 9.84" x 0.860"
  • Weight: 0.5 lbs
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