I posted an article about my active crossover project. http://jdprice1.home.comcast.net/activexo/ I decided to restrain my enthusiasm a bit in the article but I won't here. I think these speakers are awesome now, building on the Kit281's strengths in dynamics and balance and improving on some weakness in the midrange and treble. A lot of songs that came out a bit messy or harsh before, sound ridiculously good now. One of my friends said it was the cleanest sound he'd ever heard... then he proceeded to play along with an incredibly distorted song by "Live" on his electric guitar at karaokeable levels. "I alone love you, I alone tempt you..." I am trying to judge interest by other Kit281 owners in this project, so that I can organize a PCB purchase if it's worthwhile.