Fully active digital xover triamped/biamped speakers using pure digital input amps would simply kill any speaker alive.....he he......that statement will get you going.
The Peachtree GaN 1 is a 200 watt a channel stereo amp that has coax input only. It converts PCM directly to PWM.....there are no linear amplifier stages or feedback......this is the same as Tact, Lyndorf and Technics.....but according to the guy that makes these inexpensive modules.....he thinks they sound better than Technics.......check out the thread on the amp here on Audiogon.
The module in the GaN 1 is a 4 channel amp (50 watts each) that combines two pairs in differential mode to make 200 watts. If you bought two of these $2000 amps and rewired each one so you had a three channel amp.....two 50 watters and one 200 watter per channel......you could then tri-amp using a minidsp digital xover or other pure digital xover. You could then hardwire the outputs of the amps directly to the voice coil wire of drivers mounted on a super damped and braced open baffle....or box....if you like box sound. Now you have a triamped speaker that uses no DAC, no preamp, no linear amps, no passive xover. By using software in the digital domain you can time align the drivers, make the frequency flat as a board at your listening position and set the xover at any slope and frequency you want. This would simply blow your frickin mind. The volume would be controlled in the digital domain in the server/streamer using lossless digital volume control. What I suggest has never been done before but is available now. You could do it yourself......but most here are not DIYers. I am sure there are manufacturers of speakers that will be implementing exactly what I suggest inside a loudspeaker......The output board weighs less than 2 lbs......the revolution is now!!!!!!!!!!!!!!!!!!!!!!!