I'm a newbie to this Home Theater realm, and have read the posts trying to learn as much as I can. To begin my system, I bought the receiver first, the Pioneer Elite VSX-45TX. Now I am trying figure out which speakers to buy for a 5.1 initial set-up. I really like the Vienna Accoutics--Bach's and Waltz for front and surround sound speakers. The only problem is that the Waltz need 4 ohm (spelled correctly??), and from what I can tell my receiver doesn't have a set-up to drive speakers below 6 ohm. Will I hurt reciever or speakers (or both) if I set up 4ohm speakers up to this reciever. Is my only option if I want to drive 4ohm speakers is to buy an amp and use the pre-outs?