I won't adress any other craziness that was said in this thread, but I'll definetely adress this.
Most real seasoned veteran engineers only use Multiband Compression when they have a stereo track that's too screwed up to fix by any other means, or when they want the sound of an MBC to be present(which is very rarely). There's tons of cleaner ways around situations than Multiband compression. Chaining in EQ and a regular Compressor usually does a much better job. As a producer, you have access to all your sounds tracked out, so the tool is absolutely unnessesary.
MBC's are harsh on audio to say the least. Once brought into the mix incorrectly, they're one of the hardest things to correct(say someone wants to use your beat right then, and all they have is a CD with the track on it).
Professionals rarely use MBC's, but companies who make them will convince consumers they're the industries best kept secret the same way KRK convinces you RP5s are "industry standard monitors".
Again, there are acceptions to every rule. There are a few pros out there that can get amazing sound out of an MBC and include them in their arsenal regularly. But most avoid them whenever possible. If I had to throw out an educated guest, I'd say maybe 1 out of 20 pros who know what they're doing rely on MBCs regularly for mastering, and even less for mixing.
I'm sure there's tons of net stuff on the subject if you can get pass all the B.S. hype. Same B.S. hype they put behing Compressing drums, Paralell compression(mind you we're now in the digital age) and a million other "urban Mixing Myths". If RZA never said he compressed drums, you guys would realize how much vol & pan does matter in a mix. It makes no since to only put compression on a kick. Now if you chain all of your lower sounds thru the same Compressor(Bass, Kick, toms maybe, ect.)you may get some interesting results, but if you wanna talk tweaking, f**k a compressor, at least learn enough to know adjusting/cutting frequencies will take you way further. I rarely do that, but at least that will actually filter out the lows or whatever you want to bring out of your mix.
I'm game tho, somebody post a clearer beat than the ones I posted using your methods?