German-made CD management system used in commercial jukeboxes worldwide (two units available), a sleek metal and smoked glass unit. This is the fastest changer you will find. CDs are stored in individual trays so as not to be scratched or damaged like consumer changers. RS-232 control with software included. Digital and analog outputs. This demo unit has been technician certified, works great, and is sold as is. Retail $3000.00 (I can show original receipts). Lovingly maintained. 
The NSM CD-3101 is a 100 disc CD changer. NSM provides a DOS program that can run this unit and I have written Windows software (95/98/2000/NT/XP) which you can use also. My software has separate client and server parts so that you can control the CD changer from multiple other locations on a network. You can also run both parts on the same compuer. I will also include C++ source code for these programs (free), if desisred. Contact me for details. 

The CD-Rom reader shows that it is a (Philips CDM 4 Industrial) 

Outputs are two RCA Analog, one RCA digital (S/PDIF) and one Optical output. The power switch on the rear is marked Manual On (or) Remote On. Several of these units can be chained on the same RS-232 port and addressed separately; I have tested and used this configuration with these two machines. 

Each tray position is individually numbered. There are two banks of 50 trays, each bank swings out for easy disc loading. A smoked glass door swings down in front, latches at the top. Unit is industrial grade, heavy gauge steel construction. 

I have one copy of the original NSM binder which has complete schematics and technical information, including the RS-232 control protocol, which is fairly straightforward. This will go to the higher bidder, only bidder, or first bidder if both units sell at the same price. I will make a copy for the other buyer.