If you can, do an experiment with (any) amp or receiver processing the signal from the RCA jacks you plan on using.
I've found some devices such as DirecTV and AT&T U-verse boxes have problem with lip sync if signal is pulled off the RCA jacks.
On my system the HDMI is in sync, others are not. I have not been able to find a stereo amp with HDMI input, so for the moment I've given up on supplementing my TV sound.
I've found some devices such as DirecTV and AT&T U-verse boxes have problem with lip sync if signal is pulled off the RCA jacks.
On my system the HDMI is in sync, others are not. I have not been able to find a stereo amp with HDMI input, so for the moment I've given up on supplementing my TV sound.