BERP Buzz Extension and Resistance Piece for Large Shank Trombone/Euphonium Trombone Large Shank

Large Trombone & Euphonium Berp Berp Is A Brasswind Practice Device Developed By Mario Guaneri To Strengthen Embrochure, Improve Relative Pitch And Add Resonance And Range. The Berp Clamps Firmly Onto The Open End Of The Receiver, With The Mouthpiece Removed. The Clamp Is Designed To Tighten Around A Round, Hex Or Convex Shaped Opening. On Some Receivers Which Have An Oversize Ring At The Opening, It May Be Necessary To Push The Clamp Past That Before Tightening Down. Most People Prefer T