pre-out splitting

[drmolitor]

Hi. I'm putting together an admittedly makeshift/budget multi-room system and am wondering how many times I can split the pre-out line from a Marantz PM7001. I want to leave the Marantz dedicated to the living room and then run one line to an old receiver for the dining room and kitchen and another to another old reciever in the bedroom. However, I'd also like to run a sub in the living room off the pre-out as well. Is this too many splits? What's the best way to even do this? Y-adapters off the right and left and then another set off each of those?
Thanks