Powered Sub for under $800
I’m looking for a sub to complement two K8’s and not looking to break the bank. I’ve heard good things about Yorkville. Is a Behringer 18 just not worth it? I’d appreciate any help.
Shop around. I paid a little over that for my KW181. Probably a little too much for the K8’s, but you can always lower the gain. 
Roommate has the Behringer and its not a bad sub. Bass is a little punchy but not in a bad way. Is it heavy though.
Appreciate the info, thanks.