[Power to the KG4's]

I dont think i will be running a THX surround system anytime soon. These speakers will be in my dorm room. There isnt that much room to run a nice surround system that will sound ok. Will my Yamaha reciever push these speakers for my dorm room. I dont party at all in my because of my stereo equipment so they wont be abused at all in my room but there will be periods where i like to listen to some loud music. Im thinking that Yamaha will be enough but i want to be sure. Any other sugestions out there for power?

[Replacement parts for KG4's]

Where could i find replacement woofers or tweeters for my pair of KG4's?

[Power to the KG4's]

What type of reciever would you use to drive the KG4's? Does it need to be a pre-amp amp combo or would it be ok to drive them with a plan 'ol home theater reciever? I have heard they are really efficient speakers, but would i need more than 85w/channel? Im looking for the best sound to come out of these speakers. Input of what you have driving your KG4's would be helpful information. Thank you very much!

[KG4s?]

What are the surrounds on the KG-4's made out of? Is it foam, rubber, or maybe cloth? Thank you

[KG4s?]

I have done my homework on these speakers and have come to find out that they are a good buy for me. I was wondering what type of material makes up the surrounds on the speakers? Are they rubber or foam or maybe cloth? If you can help me I would be thankful!