emo passive di boxes single/dual the emo range of di boxes are extensively used in broadcast and recording studios. of substantial construction and housed in die cast aluminium boxes, they feature double stack transformers for enhanced response and interference suppression. outputs are fully floating with an earth lift switch to minimise potential hum problems. to avoid input overload, selectable 20, 40 and 60db attenuation is provided. single channel version. www.concert-systems.com