Cant beat the price for the quality either. If the splitter truly doesnt affect sound quality when using it on an output port then it stands to reason that there should be no effect when using it on an input port. Id thought they were expensive at the time as I paid around £30 for them but I have to say that I certainly got my moneys worth. No comment. This is his second pair of this type of slipper. The ability to automatically turn off within 15 mins if idle would be a beneficial addition to the next version. Gorgeous shoes! The product is a bit small in the sizing. I ordered two pair of the Isotoner slippers and I can say they are the best slippers EVER! Love!