Hey everyone! As some of you might know, I will be shortly building my first sub using a Shiva and an Adire AVA250 plate amp. A little useful background: For the first little while, I might have to be running this amp off an amp that does not have a sub pre out, it does however have a few full range preouts that I am not using right now. The quesion: Would it be OK to use the crossover that is built into the sub to let it take care of those nasty high frequencies? Also, while im sort of on topic. I'm hearing a lot about people routing their LFE channel to the mains or the sub, and the benefits / disadvantages of doing it. Could someone please explain exacly what that does, and how would one go about doing it? Thanks a lot, again. This place rules!