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CardioidHeil Sound PR-35

Cardioid Dynamic Microphone

Designed to provide a flat response over a wide frequency range, the Heil PR 35 is built around the 1.5'' dynamic element of the PR-30, in a different form factor and with the incorporation of a 3-position low-end roll-off switch. Heil intends the microphone for handheld vocal use, including broadcast and amateur radio, in addition to live sound reinforcement.

The mic was built at the request of Jason Raboin (FOH engineer for Joan Boez, a PR 30 customer), who asked for a handheld model of the PR 30.*

As in the other Heil PR mics, the magnet of the dynamic element in the PR-35 is constructed of a proprietary mix of neodymium, iron, and boron. The diaphragm is exceptionally large, providing a sound more commonly associated with ribbon mics. The design of these dynamic elements provides better rejection of off-axis sound and wider dynamic range.

Bob Heil

John Shumacher, the monitor engineer on that series of summer tours took me by the arm at a sound check one day and said — watch this, as he cupped his hands around the PR 35… no feedback. The microphone has around -40 dB of rear rejection and gave John lots of headroom before feedback.

The PR-35 element is shock-mounted in Sorbothane© to decouple the element from the microphone body. The mic’s steel body and internal humbucking coil reduce the risk of electronic interference.

The PR35 has no output transformer.

This mic ships with an aluminum case and Heil’s SM-5 mic clip.

Heil microphones are made in the USA and have a 1-year warranty.

Performing Musician, 2009

Though both [the PR-35 and PR-22] sound good, comparing them in the studio shows the more expensive PR 35 to have a slightly more solid sound with just a hint more articulation in the detail. Whether this difference is significant enough to be evident during performance depends very much on the quality of your PA rig…

There are hand-held capacitor mics that achieve a similar studio-like sound on stage, but they require phantom power and won’t necessarily give you the off-axis rejection these mics do.

The Heil Sound PR-35 is also known as: PR35.

The mic was released in 2007.


Frequency Response - CardioidClick Graph to Compare!
PR-35 Cardioid Frequency Response Chart
Pickup Patterns Pads & Filters
Cardioid (2.3 mV/Pa; 40 - 18,000 Hz)
  • Filter: flat (Via Switch)
  • Filter: HPF, -3dB (Via Switch)
  • Filter: HPF, -6dB (Via Switch)
Coil Diameter Impedance SPL/Noise
n/a 600 Ohms (Low) Max SPL: 145 dB
Weight Length Max Diameter Interface(s)
298g (10.51oz) 195mm (7.68'') 50mm (1.97'')
  • 3-pin XLR male (1)
Power Specifications

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