Compressors
Hi Mukaiya,
Regarding the rackmount compressors, I've used a few of them: Alesis 3630, Focusrite Penta, DBX 166XL and TC Electronics Triple-C. My favourite is definitely the Triple C, because of the multi band compression that I find very useful. Often, I find that my preference is to set higher compression rating for the higher frequencies as compared to the lows (because of my poor technique.. ;-). However, most of these items have been discontinued.
Currently, TC Electronics has one model called the DBMax which is an improvement of the Triple C. It offers a 5 band multiband compression and a much friendlier interface which I think is great!
Drawmer also makes really great compressors, and the most impressive multiband IMHO, is the S3. But it might be rather costly and takes up 3U! A more suitable alternative is the Drawmer DL 251. I like the "enhance" control, where it is able to compensate for the loss of highs during the compression stage.
Hope this helps.
Happy New Year!
2.f.f.