I have used an active bi-amp topology for both Magnepans and Martin-Logans: preamp - electronic crossover - amplifiers. Sounded vastly better than stock, mostly because an electronic crossover only has to shape a tiny signal, and so very high quality components cost little. Think of the difference between dividing the water from a roof drain and dividing the water of the Mississippi. I used Brystons for the bottom and Atmospheres for the top.
But there is a better solution, which I use now. Why not use a speaker with no crossover at all? Quad electrostatics, for example. Save all that money for an active crossover, extra amplifier, and all that extra power, and invest in a better speaker.
Also, if you're doing wiring anyway, consider wiring in an isolation transformer, which gives you the ultimate clean power. Makes a difference you can hear, as well as protects your equipment. Word of caution - they can growl when they are doing their job, so keep them away from your living or listening areas. Plitron makes a good one.
But there is a better solution, which I use now. Why not use a speaker with no crossover at all? Quad electrostatics, for example. Save all that money for an active crossover, extra amplifier, and all that extra power, and invest in a better speaker.
Also, if you're doing wiring anyway, consider wiring in an isolation transformer, which gives you the ultimate clean power. Makes a difference you can hear, as well as protects your equipment. Word of caution - they can growl when they are doing their job, so keep them away from your living or listening areas. Plitron makes a good one.