Preamps, Whats the difference, Active & Passive ?


Ok, so I'm a bit uninformed when it comes to this.

Is it that an active pre has bass and trebble controlls and a passive does not?

I lurk here in audiogon and read all that I can when I have questions.As a last resort I ask a question.

Is there an encyclopedia of audio terns somewhere on the web that I can access?
tweakster
If a Placette doesn't work then maybe a transformer based (Bent) passive would be a better match.
I have a Bent 102MkII passive that passes signals from my source components to a McCormack amp. I will agree that passives are system dependent (what ain't?). In my system, talk of dynamic loss, thin sound, weak bass, etc. is just that, talk, and what I am glad NOT to be hearing when I spin a disc on the platter.
I am looking a preamp (tubes) for my system since I run directly from CDP (Electrocompaniet EMC1 UP, which has balanced and single ended- I use balanced one)to amp with volume control (Berning ZH-270, which only has RCA). I need help to find any tube preamp that is matched with the Berning. I have also tried CJ-16LS, Emotive Audio Erato and First Sound Deluxe MKII (latest and new version). I appreciate your suggestions. Thanks.