Nik,
Although they are more of a broadband solution, you might want to look into the Mondotraps made by Realtraps. They only absorb under about 100Hz or so (so your room doesn't become overdamped in the higher freq.). They are a lot cheaper than the RPG's........... Don't know if they are more/less effective, but certainly a higher Q.
I recently installed four of them alond with some of their other products in my listening room to great effect.
Chris
Although they are more of a broadband solution, you might want to look into the Mondotraps made by Realtraps. They only absorb under about 100Hz or so (so your room doesn't become overdamped in the higher freq.). They are a lot cheaper than the RPG's........... Don't know if they are more/less effective, but certainly a higher Q.
I recently installed four of them alond with some of their other products in my listening room to great effect.
Chris