Apologies to Norah Jones, I needed more bass!

@billpete - Going back to your comments about power, using active crossovers changes the power to voltage relationship.  Power is proportional to the square of the voltage, so a single amp that has to do midrange and treble and bass must be rated much larger than it would if it did them separately.  

In other words, if I attempted to do this with a single mono amplifier it would have to be rated at well over 1,200 watts, much more than if we add the 3 amplifier sections together to 600W.  At my listening levels and music and movie tastes this is all serious overkill.  I doubt I hit 20W.  

@erik_squires Interesting set up. Much of this is over my head but it is interesting just the same. Thanks for sharing. 

@erik_squires Is this a multi channel HT type of system? Is this how you listen to your music? I do my serious listening in Stereo mode only and do not own any HT type of gear. For movies and TV, I'm happy with soundbars and small subs. I have a lot more wrapped up in stereo equipment than anything like HT. Just wondering if you listen to stereo recordings this way and how that affects things. I have a few DVDA recordings that have 4.1 and 5.1 options but also have stereo options, which is how I listen to them. Not trying to be a pest, tell me to piss off if you get tired of this. :)

@billpete 

 Is this a multi channel HT type of system? Is this how you listen to your music?

It is.  I had a separate HT receiver, and Luxman integrated and used the Luxman’s bypass feature to listen to movies however after doing an active center channel project I decided I would rather have something simpler, with powered speakers, than keep the hybrid system.   In particular, hearing how good the center channel came out convinced me I should make the plunge. 

I use the HT receiver but in stereo mode for music, except when I play music related DVDs.  I’m currently working through Berlioz’ Les Troyens.  The music is fabulous but oh, I wish I’d never seen the subtitles... 

Thanks for all the explanations.