Okay, so I have an Orange terror bass 500, which is 500 watts rms (call me an idiot, but could this vary with impedance?). I run it through a 600 watt behringer cab (and the cabs actually better than you'd expect for behringer haha)
Cutting to the chase, i want to buy my friends Ampeg svt 806 HE cab, but I have a bit of a pickle

. On the cab, it says the watts in two things about programs (i can't remember off the top of my head) link:
Ampeg SVT-806HE :: SVT-806HE_01.jpg picture by bassplayer4003 - Photobucket
**I Know it isn't clear, it's the best i could find**
Something about 400 watts and 800 watts. I have no idea
So if you can just tell me whether my head and this cab are compatible, because it sounds amazing! The guy let me try it out before i realised that there may be a problem.
All help is good help, and sorry if I'm being a dumb noob!
Thanks!