Oh sorry, I did not use a spliter just the one cable. I have never used the expensive cables like monster for this. But I have a pretty nice onkyo reciver and I can not tell any quality loss. thought my sound is delayed for about 200 ms but i think this is just my on board sound being slower.
Any who I have just the one rca dangleing there maybe if one day that one goes bad i can switch. Or maybe just go and buy a nice subwoofer cable. that works too.