Cloud Microphones

Cloud Microphones JRS-34

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  • Regular price R 312,547.07

JRS-34 Active Ribbon Microphone Specs

Handcrafted in Tucson, AZ USA

  • Polar pattern: Fig 8 w/ -35db null at 90°
  • Dimensions: 7.75” x 3” x 1.75”
  • Weight: 1.03lbs
  • Generating Element: 1.8 Micron Ribbon
  • Frequency Response: 20 HZ – > 20kHz
  • Output Sensitivity: -27 dBv/Pa
  • Max SPL: 138 dB > 1kHz
  • Out Impedance (in Ohms): 150 ohms
  • Recommended Load (in Ohms): 1kohm or greater
  • Powering Type: +48v Phantom Power
  • Powering Alternative: +24v Phantom Power
  • Supply Current: 4mA
  • Connection Via: XLR
  • Supplied Accessories: Wood Case, Mic cover
  • Optional Accessories: Cloud U1 Shockmount


Cloud Microphones JRS-34 Active Ribbon Microphone

From direct RCA* lineage comes the best of the vintage style ribbon sound. Handcrafted entirely in the US, the JRS-34 combines the best attributes of vintage and modern technologies to create a high-quality active ribbon microphone ideally suited for music and voice. The active JRS-34 requires phantom power and has an output level compatible with virtually any modern preamp. Included is a beautiful handcrafted wooden box and a microfiber mic cover, designed to properly store and clean the microphone.

Designed in collaboration with Stephen Sank, the Cloud® ribbon mics were given the model number prefix JRS in homage to the late Jon R. Sank, Stephen Sank’s father (1934-1998). Known for his work with RCA that produced legendary microphones such as the BK-11 and BK-10A, the senior Sank succeeded RCA’s Harry Olson as the guiding force behind the company’s continuing development of ribbon microphones.

Built upon the shoulders of giant RCA mics, each JRS-34 ribbon is cut, corrugated, and installed by hand in precisely the same fashion as prescribed by Olson. New ideas expand the performance capabilities as well, bringing the design into the 21st century with the addition of custom audio transformers by CineMag Inc., internal spring mounted suspension, patented rounded magnet, active “Cloudlifter®” JFET technology, and much more.


  • Figure 8 polar pattern, excellent side null rejection
    · Patented Rounded Magnet technology
    · Phantom Powered “Cloudlifter” Class A, Discrete Circuity
    · Frequency Response: 20 Hz to above 20 kHz
    · Maximum SPL: 138 + dB SPL above 1 kHz
    · Output Sensitivity: -27 dBv/Pa
    · Ribbon element dimensions: .19 inches wide, 2.35 inches long, 1.8 microns thick
    · New mount offers 180 degree range of motion
    · Internally shock mounted
    · Built in XLR connector
    · 2 year ribbon warranty
    · Free limited lifetime warranty on all other parts, with registration
    · Handmade entirely in the USA

*RCA is a registered trademark of Radio Corporation of America. References to RCA are historical in nature and imply no affiliation with Cloud Microphones.