Responses from sherod

How can I bi-amp a 5-channel amp to my speakers ?
Sorry for the delayed response.Thank you Sean and Macdonj for your mutual agreement on using an active crossover to properly bi-amp.It seems that it would probably be better to sell my current 5-channel amp( Rotel 985II ) and buy a more powerful 5... 
Any sound difference between DB25 & RCA Connection
Thank you Simancd for your thoughtful suggestions.I will definitely begin pursuing some good quality RCA interconnects.