The Heil PR 40 microphone boasts the widest frequency range of any dynamic mic in the Heil PR series. The PR 40 incorporates Heils sage-like understanding of phasing plug placement, along with the use of a very large (1"), low mass diaphragm, and custom magnet metals housed in a specially designed microphone body.The PR 40 diaphragm is shock mounted such that it is completely de-coupled from the anodized Champagne matte-finished steel body. In addition to dual mesh screens, each made with different diameter screen apertures, there is an internal breath blast filter on the diaphragm element itself, providing superb response for the human voice across the entire vocal range, without "popping" noises. In fact, the PR 40 will provide flawless, smooth, flat response from 28 Hz all the way up to the 18k Hz, making this a great microphone for everything from vocals, to bass drums and tom drums, to guitar and bass cabinet micing and more.In short, the PR 40 is known by professionals as the "thoroughbred work-horse" of professional sound recording and reinforcement.The PR 40 is available in champagne, gold plate, or chrome plate. With all PR 40 models you get an adjustable cast metal microphone holder in a padded Leatherette bag with molded foam insert.