Check out this video, it's not the greatest but it's something. I think the ultras and ultimates are the same thing but not 100% 4sure. The guy at the local audio shop had 3 ultras and a massive audio 1500d on them and it was banging like 12's. http://realmofexcursion.com/brands/truebass.htm
before i make the order , ill give him a call and see whats up with the other models. i always thought there was just the one since ive never seen any other TB 8's. oh well , ill find out soon.
ah , well like i said , he told me that the ones he quoted me for are rated at 300-400 wrms very conservatively. so im sure those are the ultras/ultimates youre talking about.