Why not put crossover networks in accessible compartments?

Vandersteen use a slew of high quality parts, custom drivers, graded and sorted to match within amazingly tight tolerances... and then the whole shooting match goes in the Anechoic chamber for tuning....

Treo and up filters are in a separate cabinet within the cabinet w constrained layer damping and a very unique buss bar/lug attachment to the other driver and input connection, heavy duty :-) I might post up picture on the Poverty Bay system page...