I don't like anything about 60 hz on subs. I really don't like anything about 45 hz on subs for me, but my music doesn't always have the bass notes I want. I like my subs to play down to about 25 hz, but, like you said, there really isn't a reason to play below 28-30 hz.
i appreciate that. ill get back to you when i get ready. im trying to figure out exactly where i want my sub to sit permanently right now so that has a lot to play in with not wanting to make a box yet.