I prioritize the midrange and use class A amplification with a tube preamp and solid state power amps feeding 2.5 way speakers with direct-coupled midrange drivers. 

A balanced dual-mono approach in the DAC and amplification chain, along with an optical cartridge for pure analog, provides for an exceptionally clean signal to the speakers with minimal crosstalk. Digital signal quality is promoted by separating components, limiting connections to ethernet and fiberoptic only and employing linear power supplies and redundant clocks.  

I have tried to attenuate mechanical, electrical and acoustic interference. Stands, speaker bases and footers address mechanical energy. Electrical integrity starts with a whole house surge protector/noise filter followed by three dedicated circuits, one for digital, one for both power amps and one for everything else. Extensive room treatment then ensures that the signal that reaches the listener is determined more by the recording than by the room.

But the real magic comes from the speaker and its midrange driver, which runs essentially "full range" from below 200 Hz to above 5 KHz without a crossover.  This provides the same desirable properties of other fuller range drivers, but with the advantage of acoustically matched and time-aligned lower and higher frequency drivers. It retains many of the virtues associated with traditional full-range drivers, including exceptional coherence and freedom from crossover artifacts, while avoiding their compromises at the frequency extremes. 

The final pictures show how a four-subwoofer array contributes to a smoother and extended low end (Fig.1), as well as a reduction in decay times secondary to room modes (Fig. 2-5). The active bass traps do not do much to the frequency response (Fig. 1), but they have a significant impact as they target modal frequencies that lead to standing waves, resulting in shorter decay times with less "ringing" (Fig. 2-5). Engaging them is akin to activating a subwoofer as they substantially improve bass clarity and control. Finally, absorption and diffusion room treatments put the room "within spec" at higher frequencies (Fig. 7).