How is the usual 500W Markbass power rating? Powerful and loud enough for most gigs? I read some people describe their power amp as "anemic" sounding and that there's not enough power for transients. What does that mean exactly? Do you hit the limiter too soon? I'm wondering if their 500W is enough to power my 412 cab. GK 700RB II with its 480W was loud enough, so I take it MB should be loud enough too?