Size. Quality. Price. Sound.

Would be to small for larger speakers. I am using it with Orbs and Polk RM 8's

An excellent small sub woofer for Home Theater system or with a small/mini stereo system. Tight sound. Not muddy. I have used it for 10 plus years. Right now i am have the 6 in speaker refoamed. It is worth it as it suits my needs to a tee. Lots of features. good quality.