Hi Mark

Unfortunately I am VERY sensitive to sibilance, to the point where I have to walk away from what's playing, it destroys the pleasure for me.
The Yammy mid range is very good indeed, clarity and imaging like no other and I did consider building a three way system around it.
What stopped me is availability of parts. So I decided to build a three way using currently available drivers.

The sound I am getting and I'm still not using the correct bass driver, is very good and tonally correct, which is important to me, I want a grand piano to sound like one and not like a cheap Casio keyboard. In this respect and with voices the Quads do a very good job. At the end of the day I am the only person that can judge the system, as my requirements are probably different to most peoples. Also these speakers are not a direct replacement for my Yamaha's, everything I'm learning with this 2-way active crossover will be carried over to my Yamaha's 3-way active crossover.