dbx 160VU (2)vintage opto compressors which sound good on bass and not much else. did I say good? I meant amazing.
2009 update: I now use these on all kinds of things and have since determined my previous statements above concerning these compressors' limited usefulness to be rather short-sighted and untilmately ignorant. I could just edit this whole entry and make it seem like I never said anything stupid, but I'm not into revisionist history. Well, not today, anyway.