So a spot opened up in my buddy's band for a bassist and, as of a week and a half ago, I became one. I've never tried bass before so everything is new. So i got an Ampeg PF-500 since it is so popular and reasonably priced. i messed up though and got cabinets that are too big for the amp (4 ohms each). Its ok though, the band figured out a decent workaround and I couldn't believe how those cabs were booming. What we did is route the PF-500 through a 2 ohm power amp from the pre-amp out on the PF-500 and then hook the cabs to the power amp. The power amp took all the heat. The PF-500 was totally cold. I was able to get my 4x10 and my 1x15 sub to work great and I was able to blend in between two elite guitarists with full stacks. It's kinda fun when it all works out. The only thing that sucks is that there is no way to rack mount the PF. I might actually have to custom make a set of rack ears for it to work.