My current setup includes a Sony STR-DE805G receiver powering two 500 watt Kenwood LS-P9300 tower speakers. I am not satisfied with the sound quality produced buy the receiver so I decided to purchase a Soundcraftsmen a5002 power amplifier. Here is the problem, there is no preamp output for an amplifier on the receiver and the amplifier requires rca inputs. What is the best way to send signal to the power amplifier without having to replace the receiver with another model. I considered an rca switch or a preamplifier but am concerned with sound degradation from sending signal through multiple rca cables. Any help would be greatly appreciated.