My speakers are custom built 3 way. The crossover was designed by an eccentric engineer who did nothing else. It utilizes Solen Metallized polypropylene capacitors for the woofer, and Jantzen Superior Series Z-capacitors for the midrange and tweeter. The tweeter is a ESS Heil air motion transformer, the mid driver is Vifa 6 inch mid woofer, the woofer is a 12 inch Pioneer. Each driver has it's own crossover, that means three crossovers per side. Speaker wire is maximized for each driver; copper silver composite for the tweeter and so on. It is a 3-way 4th order T-type; the crossover frequencies are 400/2500; 92DB efficiency. At present, they are operating on the 4 ohm out of a tube amp.
The ESS AMT is a dipole, this accentuates the "Holographic" sound stage which is behind the speakers, that appear for the most part to be useless pieces of furniture. Non audiophiles have to get up and look behind the speakers for hidden speakers, since that is where the sound is emanating from.