What exactly are they and what should I look for?

ok ive had preamp and compressor problems in the past
thanks everyone for all the help on that.

ok well i have an Alesis 3630, and its givin me a number of problems
and I'm guessing this a common, easy problem since I'm new to compressors/limiters.

its cuttin off my vocals and giving me that "breathing/huffing" effect.
now thats when i put my output up.

...

Here is a simple track I've been using to get familiar with my Limiter. Do you all think it's too loud? My average RMS is between -11 and -10 dB. To my unexperienced ears, I haven't lost too much of the dynamics, but tell me if this is fatiguing to you.

Here is a screen-shot of one of my bass drum hits (I think it is, at least...)

Hi, I've just installed version 4.1 of the UAD1 plugs on my Digi002 PT 7 LE system and activated the demo of the Multiband Limiter; I've inserted the limiter on the master track of a project and I get this situation: the right channel remains unprocessed while the left channel is processed but delayed! I've already tried to change the playback buffer (latency) settings... any suggestions?

I've been learning about pre-masking and post-masking lately, and I can't figure out how these pyschoacoustic phenominon affect limiting in the mastering chain.

Hi Guys,

I've heard a lot of different limiters used on the master (Manley being my favorite) but I'd like to know if anyone here is using that same limiter or compressor on let's say drum OH's. This does not by any means have to be a Manley, and under $2500 would be preferable.

-Thanks
Jeremy

i've been told i need one of these to bring up my RMS levels, cause they've been too low. Anybody know where i can get these and how much they cost? also, which one would you prefer?

ok, now before I record vocals I adjust the mic volume first to ensure a zero to minimum amount of clipping concidering my position and potential peak volume. After I'm done recording and tweaking any volumes as needed I have a vocal wav with zero clipping.