I have several pieces of audio gear and am always trying different things,so my question is ,is it alright to split the pre out with Y adapters to run cables to 2 or more amps without hurting the preamp/receiver.One of the ways I have done this is plugging 2 Y adapters into the R/L pre outs of a receiver then sending the signal back into the main in of the same receiver with one set of cables and to another power amp with another set.I don't typically run two sets of speakers at the same time but, if I did could it damage anything.