adding active cross over to my system

I am exploring adding active crossover to my system and I wondered what you would suggest for the 2nd amp. Should I apply the J2 to the Woofer or the midrange?

Any suggestion for speakers? Would it make sense to consider custom or DIY speakers?

I listen primarily to chamber music at low volumes at a range of 6 to 10 feet. I want to expand the frequency range of my system to play symphonic music

Toshiba w Jriver
Wyred 4 Sound DAC
Warpspeed Preamp
First Watt J2
Hornshoppe Horn
Balance Power Technology Conditioner