That's a good question, I know it works through a breakout box. The only answer I can give is try and see.
But, another part of me thinks, if you are going to have to run cables through the wall for the USB and will need to extend the HDMI cable anyway, why put it though the AMP?
But, another part of me thinks, if you are going to have to run cables through the wall for the USB and will need to extend the HDMI cable anyway, why put it though the AMP?