Rackmount Kit f One Two Radial FireFly Tube Direct Boxes 1U Use the Radial FireFly Rack Kit to mount one or two FireFly tube direct boxes into your rack. If you haven't heard, the Radial FireFly tube direct box serves up sweet tone for guitar, bass, and even keyboards that need a healthy boost. They're great for live use, but sound awesome in your studio too. So if you'd like to make the FireFly a permanent guest in your recording studio, just get this Radial FireFly Rack Kit from Sweetwater today! Radial FireFly Rack Kit Features: Rack kit for Radial FireFly tube direct box Fits one or two FireFly units Takes up one rack space Put your direct boxes in your rack with the Radial FireFly Rack