NEW Heil Sound SM-3 Mount for PR40 Microphone - SM3 PR-40 The Heil Sound SM-3 shock mount works with the PR 30, PR 31, PR 40 and similar body styles The SM-3 is Heil Sound's professional suspended shock mounting system This shock mount works with the PR 30, PR 31, PR 40 and similar body styles The SM-3 is Heil Sound's professional suspended shock mounting system This shock mount works with the PR 30, PR 31, PR 40 and similar body styles