Fixing the sound output over-lapping...
As it has been said below, there is a very easy method of fixing the little problem of both inputs/outputs playing at the same time, and it will literally only take you a second! If you want to listen to one output, simply turn the other one off...it's as simple as that! If you have an iPod on one, and XM on the other, just power-off the iPod to listen to XM or power-off the XM to listen to the iPod. Seriously, it's THAT easy! -Chad