Hi 3rli
There are many subs and these are different in terms of size, design and power....
You can refer to audioholics website or google search on different types of home subwoofers...placement too plays an important part....would suggest you audition the different brands and types (sealed / ported) ...sizes 8 inch or 12 inch or 10 inch with the same kind of music on nominal settings and decide.....
Trust your ears....you can also rely on some posts and online reviews to steer your final decision