Reply to "quality question about AA amps"

Unfortunately you aren't going to get much better then Crown and QSC. Crown is considered the top amp manufacturer in the world, biggest reason being the 6 year warranty in which you can literally throw them into an ocean and Crown will fix or replace them. You also can have it repaired under warranty at a Crown certified shop.

QSC has come a long way as well. They have matched Crown's warranty, which should say something. Lab Gruppen is another big player.

Now, the above do make cheap lines, LPS and XTS come to mind. But still has the warranty behind them, they just don't sound as good or hit nearly as hard. To answer your question about AA amps, I have no experience with them unfortunately. But chances are if you are using Crown and QSC currently, I would stick to them. Maybe someone else can offer better insight into AA amps. Just my opinion, so take it with some salt .