The podDI is a single output summing direct box. Use it to connect CD and MP3 players, computer sound card outputs, DJ mixers, etc. to professional equipment with balanced inputs such as a mixing console. Accepts stereo inputs and sums them into a single mono output. A variable attenuator on each input allows level matching between left and right inputs. This makes the podDI from Whirlwind a passive mixer in split track audio applications, balancing the voice track and the music track levels in the summed mono output. Signal is input via 3.5 mm (1/8") stereo TRS jack or color coded RCA phono jacks Unused input can be used as a "loop through" Output is via a balanced male XLR jackGround lift switch to help eliminate hum and buzzCan also be used as a high quality single inputGet the latest DJ gear, right here at Sam Ash Direct! With our many decades of experience and efficient order processing, your satisfaction is guaranteed!