I have the AP30001D which is basically two AP15001D put together in one case. They're pretty sweet, does their rated power and doesn't sound bad at all. It looks like it belongs in StarTrek back in the 80s so I'm not too hot on its looks but they do perform. I have no idea why they decided to pick such a generic name like Audiopipe, should have named it "Covenant Technologies" or something cool.
Everyone says the Audiopipe is for noobs and are crap but most of them either don't have one or have a big budget. Well if you have money then good for you, if you're just trollin then FUUUUUU
I'll probably end up selling my AP30001D eventually though, because I want some American Bass VFLs...