Hello, I have a few questions about setting up my NHT VT-2 speakers. I read that it's best to bi amp them. I understand how to connect them properly to my amp (PTM 6150 ) and they will get about 200 amps per channel. I'm only running the 2 front and a center, so I might as well use 4 of the 6 channels for the front speakers. My question is if the Harmon kardon citation 7.0 pre amp can bet set up correctly for biamping? I currently have my amp connected to my oppo BDP 83 , but they are not biamped. Do I need to get a new pre amp to biamp or what would you recommend? Thanks