With the vast majority of source material in digital form, why haven't systems that do the D/A conversion and amplification IN the speaker become a standard architecture? That architecture provides many opportunities for efficiency, refinement, and ultimate compatibility. For anyone not familiar I'm speaking of a front end device that sends the digital signal via what is essentially a network connection to the speakers. There the D/A conversion takes place, the signal routes immediately to amplification, which can be optimized for each DRIVER. The purity of this is unmatchable by conventional architecture. A very clean set up, the analog signal doesn't travel through interconnects or speakers cables either. The Meridian system has been around for 5 or 6 years now, NHT built a system, also Dynaudio and Genelec have excellent studio monitor systems designed this way and reviewers have praised them, but there's been no further movement. I'm mystified, since this takes full advantage of what digital encoding of the signal path offers.
I've heard it said that this architecture doesn't allow for much in the way of "tweaking". That is, switching of cables, amps, converters etc. To me that seems like a good thing. I've also heard that retailers don't like this system because it isn't well suited to component upgrading, thus they are less able to sell to a customer repeated upgrades. I think modular designs could help with that.
Are you familiar with this system? Have you heard one? What do you think?