Instruct: Classify Amazon reviews into positive or negative sentiment
Query: surprisingly great for the price

I didn't expect much from this fairly cheap subwoofer: I wanted a subwoofer for my home theater, and that's it. I was impressed with all of the options built-into the subwoofer. There is a "super-bass" option in addition to the usual volume option. There's a power button to turn it off without having to unplug it. The bass is directed downward which is exactly as one would want a subwoofer. There are RCA type plugs on the back so be sure your stereo receiver uses this type of connection. Pleasantly happy with the sound.