Troels Gravesen THE LOUDSPEAKER 2 Build... or something very close to

academia50
Thx for the detailed answer, and guess what, i actually use a Crown CTS1200, very good amp, not as good as a Lab gruppen but perhaps as Chevin.
I listen almost every kind of music (symphonic, jazz, rock...) but sometimes, when it comes to electronic music, i want high level and yes now i'm little affraid for my dtqwt, so i think at the loudspeaker as a good evolution, in this way.
 
@xam198 if you have height problems, you can put the reflex ports like TL1 besides TW and mid and you can make the cab slightly shorter.
Another position por bass reflex wouls be in the sides or a rectangular reflex port.

Another chance would be to try to reduce distance btw tweeter and mid and mid and woofer

I haven't heard 3WC-15, but I can assure you that if you want to play really very loud and with the best quality, TL2 is your choice.
These beast will kill make explode your amp (and your ears) before you can make them explode
 
I would like to find the crossover parts values for this speaker, mainly to see what filtering it uses for both the NSD1095N and 10" 18 sound mid-bass driver. I was likely going to use the B&C 8PE21 as midbass, along with a decent 15" LF crossed at 300-350 hz.