Used this to replace my powered subwoofer in my surround sound and it worked great. Highly recommend.
Bought these as a gift for my son, we installed in a sealed "trunk" style box. (.51 cubic feet per) We have them running through a Pioneer 900w 2 channel amp @4ohms and they sound great. (Great response, crisp) These were a great alternative to the DS18 Elite 8" subs I have. Entry level price point and requires WAY less amp to run them. They really fill in the bottom end, respond to lower frequencies than you would expect.
Bought to replace a subwoofer in an 5+1 infinity surround sound. it took a few little cuts to the box with utility knife tyo carve a little sawdust board away and 15 min later I was back to watching the windows shake :) . Heavy deep bass for a great price.
Have ds18 in my truck and boat. Couldn't be more pleased with their sound. Get complements all the time.