I second what Pacific_island and Samhar have said.
The Vandersteen 2wq Subs are sealed boxes (not ported) and so the bass is real and tight (not bloated and full like the ported designs).
Having 2 of them as a stereo pair not only will give you the bass you want, but will help fix any room resonant problems as it will 'pressurise' the acoustic space if positioned in 2 opposing corners. They also will help eliminate intermodulation distortion in your main speakers' woofers.
I had the REL Stadium II for 10 years and the Vandersteens are in a different league.
The Vandersteen 2wq Subs are sealed boxes (not ported) and so the bass is real and tight (not bloated and full like the ported designs).
Having 2 of them as a stereo pair not only will give you the bass you want, but will help fix any room resonant problems as it will 'pressurise' the acoustic space if positioned in 2 opposing corners. They also will help eliminate intermodulation distortion in your main speakers' woofers.
I had the REL Stadium II for 10 years and the Vandersteens are in a different league.