And yes - I only use one remote to work both units. Basically, when you daisy chain the players, the second player is a slave to the first. the first player controls when and how the second one is working and can even read the cd names from the second player (if encoded or pre-labelled).

And yes, they are deep. I'm happy that someone else mentioned this. Mine are free floating on the floor behind the speakers, so it's not much of an issue, but in a rack, they might be too deep.