4-Input/4-Zone Stereo Mixer. The S-zone gives system installers all the features they need to control up to four zones of audio with a compact, single rack space unit. It features two balanced mic and four stereo aux/line inputs with a unique front panel control section that allows you to assign any of the four inputs to any of the four zones with just the push of a button. The front panel layout also has input and output volume controls, independent 2-band equalization, and an on board speaker for selectable zone monitoring. Features include:; 4-channel/4-zone stereo mixer; Two mic/stereo line inputs with ducking; Two stereo CD/line inputs; Onboard speaker and headphone monitoring; Euroblock output connectors; Remote volume control