Originally Posted by MooMan
Do I do this before of after siphoning the beer off the trub?
I don't really get this question. Where are siphoning it to? If you mean to go to the bottling bucket, then I would cold crash while it was still in your fermenter. If you are transfering directly to the keg, then I would still cold crash while in the fermenter.
Another reason why I cold crash (at least in the winter) is to save some energy in my kegerator. If I leave the fermenter sit in the garage for a day or two when its cold outside I get the yeast/haze fallout plus the added bonus of my beer already being close to the temperature in the kegerator. This is especially beneficial to me since I use a cold box extension on a mini fridge for my under-counter-rator. The less work I make that compressor go through the longer it will last me.
Brewing beer is the only reason I will ever like winter. The entire process seems so much easier.