Stereo Passive PC Direct Box. Samson's MCD2 Pro Stereo Passive PC Direct Box is the ideal solution for connecting unbalanced line level signals from laptops, CD/MP3 players, and DJ mixers to professional, balanced equipment. Durable, roadworthy construction and two Mu-Metal shielded transformers provide high-quality signal connection solutions for a variety of live sound and recording applications. Features include:; All-metal, impact resistant design; Dual Samson STLX Mu-Metal shielded transformers; Stereo/Mono sum switch; 2-position 0dB/-12dB attenuation switch; Ground Lift switch; Dual 1/4"; and RCA inputs; Stereo 1/8"; input; Dual balanced XLR outputs; No Phantom or Battery power required