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CardioidHeil Sound PR-40

MSRP: $375 Cardioid Dynamic Microphone

Heil Sound PR-40

Description

Billed as, simultaneously, “Absolute most natural voice response for talk show hosts” and “Best kick drum microphone ever,” the PR-40 has the best low-end response of the Heil PR series of dynamic mics, while retaining the midrange articulation that is characteristic of all of Heil’s designs.

  • widest frequency range available in a dynamic microphone
  • can withstand ~145 dB
  • natural voice articulation
  • outstanding cardioid patterns with ~45dB rear rejection
  • large (1.125''), low mass diaphragm
  • special mixture of neodymium, iron, and boron giving the strongest magnet structure available
  • two different diameter mesh screens and an internal breath blast filter
  • the dynamic element is mounted in a Sorbothane© shock mount atop a non-resonant fixture
  • the mic body and the internal hum bucking coil remove EMF noise

PR 40 end-fire logoNote that although the case looks like a side-address design, the moving coil points out the top of the microphone. The large wraparound screen provides easy access to the bottom of the dynamic element — the phasing plug — which gives the PR 40 such high levels of rear or “off-axis” rejection.

Bob Heil

I designed the element to have an entire 360 degree opening — the entire BOTTOM of the element that focuses all of those rear signals into the phasing plug. I mounted the element on top of a ‘collection tube’ — a 1 1/4'' diameter by 2.5 inch long tube that the element sits on top of — right up against the end fire screen. Since the signals vary in length according to frequency, I allow them to enter through the 2.5'' of side address screens, 360 degrees around. The rear signals ‘flow’ into the screens and collect on the tube as they flow up into the bottom of the element. The result is an amazing 45 dB of REAR rejection.

The Heil Sound PR-40 is also known as: PR40.

Pickup Patterns Pads & Filters
  • Cardioid (28 - 18,000 Hz)
Coil Diameter Impedance Max SPL
29mm (1.14'') 600 Ohms (Low (50-1000 Ohms)) 145 dB
Weight Length Max Diameter Interface(s)
383g (13.51oz) 170mm (6.69'') 52mm (2.05'')
  • 3-pin XLR male (1)
Power Specifications

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