SPL 2CONTROL Analog Monitoring ControllerThe SPL 2Control is a compact, lightweight analog monitoring controller offering flexible and portable control of multiple sets of speakers and headphones for audio engineers, producers, and musicians in the studio or on the road. Route two stereo sources via balanced XLR inputs, and connect two sets of stereo speakers to the XLR outputs. A mono XLR output accommodates a dedicated mono speaker or a subwoofer. The two 1 4" TRS stereo headphone outputs