I did a lot (a lot!) of tweaking on the digital filter in the DBX Driverack PA2 since the first video. For now this sounds very acceptable to me. I'll see if I can find a way to do better audio recordings. Up until now all is done with an el cheapo old Canon Powershot.
Sound is dry, crisp, detailed, dynamic, deep. Just the way I like it.
I'm awaiting a 2x4 Watt single ended tube amp to power the tweeters. At 106 dB/1m they don't need much. :-) Interesting to see how that works out.
For now it is a full class A 2x10 Watt noname Chinese solid state amp (the golden thing) driving the tweeters. Crown XLS 2000 on woofers and Crown XLI 1500 on mids.