Heil Sound PR 31 BW

A Model Developed with Bob Workman for "Field" Recordings

The Heil PR 31 BW was born from a collaboration with the legendary Nashville front-of-house engineer Bob Workman. The idea is simple: to offer a dynamic microphone capable of handling high levels while providing a strong presence in the midrange, where the definition and clarity of amplified instruments and drums are crucial. Within the Heil range, the PR 31 BW also stands out for its shorter body, designed for quick and precise placement when every centimeter counts.

Intended Uses and Musicians

This microphone is aimed at guitarists, drummers, sound technicians, and home studio users seeking a reliable tool for close-miking. On a guitar cabinet, it emphasizes the articulation and character of the amp while maintaining good isolation from other sources. On drums, it excels at capturing detail in delicate positions: under cymbals, near a tom or snare, or as overheads when space is limited. It is also comfortable on monitor cabinets, thanks to its ability to limit rear pickup and maintain a usable signal even in noisy environments.

A Design Focused on Placement, Isolation, and Impact

The PR 31 BW is a large-diaphragm dynamic microphone designed to deliver a focused and immediately usable sound. Its frequency response from 40 to 18,000 Hz is paired with a deliberately emphasized midrange area, particularly relevant for instruments where presence, bite, and clear mix readability are sought.

Cardioid Directivity: An Ally Against Bleed

Thanks to its cardioid polar pattern and effective rear noise reduction, the PR 31 BW helps isolate the targeted source. The result: less bleed from other kit elements, fewer stage leaks, and a sound that is easier to process (EQ, gating, compression) without bringing up unwanted elements.

Short Format: More Freedom Near Cymbals and Drums

With a length of 10.8 cm, this mic fits where longer models become cumbersome: between stands, near hoops, under a ride or hi-hat, or in a cramped booth. This compact size also facilitates maintaining proper mic angles to finely adjust the balance between attack, body, and ambiance.

High Level Handling for Powerful Sources

The PR 31 BW can handle a maximum SPL of 146 dB, making it particularly reliable on very loud sources. Whether it's a driven amp, a snappy snare, or a hard-hit tom, you maintain a stable capture without fear of saturation due to acoustic pressure.

Technical specifications

Frequency response	40 Hz - 18 kHz	Capsule	dynamic
Category	instrument microphone	Color	Black
Directivity	cardioid

Type	large-diaphragm dynamic microphone	Impedance	370 ohms
Polar pattern	cardioid	Length	10.8 cm
Max SPL	146 dB