i have had and used a few subs, owned a few bostons, rally 10in, pro 12.4 and 10.5, had a treo in there and a couple of others. my last sub is one of my fav's Oz audio matrix elite 12in. had it running of a SS rubi502, 500wrms and the thing pumped. had 4kw going into it for a while too and for a sub that was rated at 750wrms it was a decent effort. i have 6 subs goin into the lux, qmax 6.5in subs and will have around 3-4kw on tap for them i have seen one of these put out 130db!! there damn impressive.