Diaphragm Calls that bring in the Big Toms The Black Reactor was designed by 3X Grand National Calling Champion Scott Ellis, and it is arguably his best design. Beginner and expert callers can take their calls to a higher level with the Black Reactor. Three years of development resulted in a call that produces realistic sweet yelping with a smooth front end and raspy back end. The Black Reactor produces true-to-life soft and shy or loud and aggressive tones. Woodhaven Custom Calls Black Reactor Specifications and Features Woodhaven Custom Calls Item Number WH103 Three Reed Difficulty Level Easy Color Yellow