OK, thought I would ask again - has anyone installed any aftermarket Subs yet?

[H3 Hummer]

Like I said ealier in this post, I did not want to spend the extra money on a monsoon system so I spent the extra money and got a nice after market Alpine with Ipod integration. I did not have factory "punch" speakers so I got a 10 inch sub and amp. This amp and sub lets this speaker control the low range more efficiently and makes the whole system sound cleaner. not louder blowing out ears just clean like the way the music was intended to sound.