I plan on getting an H/K 525 for my main HT setup, and using it to feed up to 3 other receivers/amps with the "second zone" outputs to send sound throughout the house. Is this possible without sound degradation ? Is splitting the output into 3 even possible ? or recommended ? how to if so ? I know I could get a specialized amp and speaker selectors, etc. costing big bucks, but I have a good 2 channel amp to drive the upstairs and I can use my current H/K 310 downstairs to run at least 2 sets of speakers and maybe even more if the H/K 310 is stable at 4 ohms (4 sets of 8 ohm speakers) this is my last question ; do you know if the H/H 310 can run safely at 4 ohms ? Thanks.