Joshua came to the same conclusions for Tic-Tac-Toe and Global Thermal Nuclear War.

Actually DVD Decrypter will also do the "main movie" on the free version and that give you a Video_TS folder. Personally I use Handbrake on Linux. Once DeCSS is installed you rip the DVD with Handbrake. I use MKV and run it as 900Kabr (2-pass encode) for the video and direct copy of the AC3. I then have access to my entire collection from my WD Live TV+ connected to the HD TV in the living room and the optical SPDIF the the Yamaha receiver. All the joy of DVD in about ¼ the space and can on a rainy day watch a trilogy without having to change discs.

I took it to mean speaker cabinet. I thus counted each sub-woofer as 1 or in the case of my 5.1 speaker system I counted as 6. I did not count speakers that are integrated into a device (Television, Guitar amp, clock radio, etc.). I did take into account the 2 external guitar speaker cabinets. I also looked at my 2.1 computer system as 3. Just from that I ended up over 20. But I come from a family of musicians.