SPL CONTROL ONE Monitor ControllerThe Control One from SPL is a monitor controller in SPL's One series of high quality audio equipment. This monitor controller offers two stereo inputs (one balanced, one unbalanced) as well as two speaker outputs, a headphone output, and a subwoofer output. As with the inputs, the output sections give you a choice of balanced or unbalanced 1 4" connection points. An input selector lets you switch among the two sources, which you can also blend, if