Need Information on Quad-77 CDP

Is anyone familiar with these cdps? I own one and have searched the web for information with minimal success. I'm trying to find out more about the internal workings of the cdp. I'm pretty sure it's a basic 16/44.1 with no upsampling. The manual provides specs but nothing more. Any help woyld be appreciated.
Try contacting Quad directly. If you live in the U.S., contact their rep, IAG America. Good luck!