I am looking at the Bavarian soundwerks stage 1 package for my BMW x5 non DSP. I was wondering is there a stage 2? or a stage 0? i see a stage 1 but i dont see anything else. How good are these speakers? have anyone gotten them? I just ordered a JL500w/1 amp with a Infinity Kappa Perfect 12 sub, was thinking of ordering the stage 1 speaker package also.
Any comments are welcomed thanks

P.S- When i drive my BMW sometimes the music turns down by itself and turns back up again, its really annoying. Like when i'm driving 40mph and all of a sudden you can notice the music get turned down, but after 15-20 seconds the comes back up. Is this normal?

Thanks