Rolls DB14B Stereo Direct BoxsignalThe DB14b is a special purpose direct box for applications where a stereo source signal can be separated, and individual volume controls used for each track. It provides a summed XLR output four uses such as an AV presentation from a laptop computer, or a rehearsing choir to a music track. Hum elimination is also included with the ground lift switch. It has stereo RCA and 1 8\\\ inputs