Are you retarded?

They took over a year exactly because I kept refining until I believed they were the best I've heard or could make, if I wasn't happy I'd still be doing it now. I documented much of it in these threads, including accounts of me moaning about poor performance and praising the stuff that was right:

http://www.diyaudio.com/forums/showthread.php?s=&threadid=52876

http://www.diyaudio.com/forums/showthread.php?s=&threadid=62391

Realise that when I was unhappy I swapped, ripped apart or redesigned until I was happy. I could have been finished long ago but until I had reached what I wanted I kept refining.

These look familiar:

ATC 15" SB75-375SC:

Used in the 150's. Sold them within a couple of months like many other drivers I've tried - that should tell you what I think of them. The big ATC drivers sound bloated and slow in comparison to the better drivers.