Don't get me wrong, US amps are good amps, not the best, but good. Ran a couple myself back when. But for all the people who smoke their Audiobahn stuff, i don't know how you guys do it? I had an Alum 10, then went to an Alum12, and powered it with a Soundstream ref700sx, NO ISSUES at all, for a long time. Sold the sub to a friend, and 3 years later....still no issues. I have another guy i know who runs an Alpha amp(can't remember model number) on 3 Aluminum 12's(a-bahn) and, yep you guesed it, no problems. Bottom line is, if you like the Audiobahn stuff, you'll like the Alpha stuff. Don't let a lot of people who blow subs and amps and speakers left and right, then go with Adire, or ED or RE cause everybody and their idiot friend is doing it. One of the reasons they prob. havent smoked that stuff is due to how over-built it is, which is a good thing for all the people who can't seem to not cook "normal" gear. Again, hope you make your decision based on what you know, or can maybe check out at a local shop.
Also, no one flame me for the ED, Re segment, if you read it carefully i wasn't putting them down, i even stated they were "over-built", so keep your post count, i agree they are good brands........(whew!)