Tai: Those are some speakers. There's an article by Thiel about placement:
http://www.thielaudio.com/THIEL_Web/Pages/faqplacement.html
But before you go buying sub woofers what about some treatment? Some form of weight on the top of the speaker? Can you put some cushions behind your head where the tweeter and mid pass by? If you have a tile floor try a couple of cushions on the floor at the mirror point with the tweeter. I just think with those kind of speakers you should just try a little treatment.
Regards,
http://www.thielaudio.com/THIEL_Web/Pages/faqplacement.html
But before you go buying sub woofers what about some treatment? Some form of weight on the top of the speaker? Can you put some cushions behind your head where the tweeter and mid pass by? If you have a tile floor try a couple of cushions on the floor at the mirror point with the tweeter. I just think with those kind of speakers you should just try a little treatment.
Regards,