Exactly, to the (one) word, what I intended to reply.
kalali,
Why would a DAC be any different than amps, preamps, etc.? Do you think that a DAC only has a D-to-A chip inside of it? The quality of power supply, power filtering, power regulation, etc come into play just as much as with analog components and actually even more since there are two power supply circuits to contend with, digital and analog, as well as eliminating jitter and noise from the interface with the transport/music server/etc.
Dave