@Captaindidactic, I wouldn’t be too concerned about the choice of y-adapter. Just get whatever strikes your fancy that appears to be of good quality and is not much longer than necessary.
First, keep in mind that most cable parameters, and therefore presumably the degree of most cable effects, are proportional to length. Second, while there have been more than a few reports here to the effect that "splitters degrade the sound," my belief is that in most of those cases the reported findings result not from the splitter itself, but from some combination of several factors that would not apply in your situation. Namely impedance incompatibilities that can arise when a splitter is used; ground loop effects that can sometimes occur when an output is used to drive two separate components; and increased loading of outputs by cable capacitance, that can result when an output is split and is used to drive two lengthy cables.
Good luck. Regards,
-- Al
First, keep in mind that most cable parameters, and therefore presumably the degree of most cable effects, are proportional to length. Second, while there have been more than a few reports here to the effect that "splitters degrade the sound," my belief is that in most of those cases the reported findings result not from the splitter itself, but from some combination of several factors that would not apply in your situation. Namely impedance incompatibilities that can arise when a splitter is used; ground loop effects that can sometimes occur when an output is used to drive two separate components; and increased loading of outputs by cable capacitance, that can result when an output is split and is used to drive two lengthy cables.
Good luck. Regards,
-- Al