Over a year ago I traded in my 8" sub which was a few years old.  I wanted more punch for my HT.  I purchased 2 SS 10" subs for my home theater.  These guys pack a punch!  Everything comes alive with explosions and booms and shakes the 1st 2 levels of my house!!  They work really well with my other 7 NHT speakers VT2 (front), M7 (center) recently purchased), VS2A (Rear), NHT Absolute (Surround).