I want to biamp my speakers. My pre-amp only has one pair of line output terminals. Can I just use a simple Y-splitter cable to split the signal between the two amps, or will that degrade the signal?

I am on a tight budget buying a house etc. My wife "loves" the look of the Dynaudio Contours S3.4s, and I love the sound. However,that in itself will eat up a majority of my two channel audio budget (listening room 15ft w 12ft d 9ft h). I need descent amplification to last me a year or so until I upgrade.

My choices:
1. I have an old Adcom 5400II amp. What used preamp from Audiogon should I match with it? Or should I chunk it for better sound?

I've got some Paradigm Signature S4s on the way and the J-23 stands. I've always had floor standing speakers in the past so this is my first experience with stands. One of my concerns with fill is moisture, so I wondered if Oil-Dri might be a reasonable material to use. My local Sam's club sells it by the 50 lb. bag, and I happen to have an unopened bag at the moment. I don't believe Oil-Dri is corrosive so I don't think it would hurt the stands, but as I've only used it on epoxy covered concrete that may be an incorrect assumption. Good idea or bad idea?