Say I wanted to separate amp the channels in my receiver, but I also wanted to use the receiver's own amps as the higher frequency driver amps in a bi-amp situation. Is it possible, using say a splitter on the channel outputs to route the signals to both the outboard amps and the internal amps? Or would the receiver know you were taking the line signals out of the amp path initially and would prevent you from using the power amps? Older receivers used to have provisions for interposing add-ons like Dolby noise reduction devices, etc, then you could route the line signal back to power amplification. Would different impedences of the internal versus the outboard amps interact negatively if a split output was used on the line signals?