Pre-amp to Amp is analog
Not sure about digital amplifiers
DVD to Pre-amp would be single digital cable unless you are using the 5.1pre-out on the DVD to the 5.1input/SACD/DVD-A connection which uses 6 analog cables.
CD to preamp would be anaog if you are using the standard output (2 cables), if you want to use the fiber-out or coax-out then it would be 1 digital cable needed
Pre-amp to subwoofer would also be analog
hope that helps!
Not sure about digital amplifiers
DVD to Pre-amp would be single digital cable unless you are using the 5.1pre-out on the DVD to the 5.1input/SACD/DVD-A connection which uses 6 analog cables.
CD to preamp would be anaog if you are using the standard output (2 cables), if you want to use the fiber-out or coax-out then it would be 1 digital cable needed
Pre-amp to subwoofer would also be analog
hope that helps!