My bass teacher saw my EQ pedal in my case at my last lesson, and we started talking about tone a little bit. He said if I wanted great tone, Aguilar makes an outboard preamp that basically makes passive basses sound really good. I did some research and it's gotten good reviews. Here's the page for it on the Aguilar site: http://www.aguilaramp.com/products_preamps_db924.htm. It retails for $180. I just missed one on eBay that went for $100, but that was the only auction up for one of these.

My question is, does anyone have one of these, or experience with a similar product? By the way, I have a Geddy Lee Jazz Bass and a Behringer BX1200 amp (yeah... Behringer), although when I play with my band I play through my friend's G-K head and 15" cab.
You're right, I didn't want to hear that, but it makes sense and that's probably what I'll do.

And I'll spare you the question of "What's a good amp..." and do a search.
that gk stack wouldnt happen to be the "brat pack" would it? in which case i wouldnt put it in any higher respect than your behringer.
Actually, it is. It sounds better than the Behringer, but not much. It's really muddy.

The problem that I've encountered now is that good amps with enough volume to actually use don't come cheap, and that I don't have a lot of money.