Blue Circle BC 505 DAC.
From the BC website: 24bits, 192Khz D to A engine Standard inputs: Toslink, AES/EBU, SPDIF (RCA) Optional inputs: SPDIF (BNC), USB 16/44, USB 24/96 Mixing and matching inputs is possible Standard outputs, 1 pair of RCA and 1 pair of XLR Dimension: 17.5" x 4.5" x 15" deep Weight: 36 lbs
This unit was originally from Amherst Audio. There is no box, but the owner of Amherst Audio can get one from Blue Circle if one is desired. Includes power cable and manual.