In case anyone else besides you and I are reading this, please be aware this is outside the intended realm of this forum, as this is a technology item not related to speakers. As moderator I am going to end this discussion with this post.

Ah, gamer. Different. Input lag is the amount of time it takes for the video to respond to an input from your mouse, controller, joystick, whatever. Sorry, I am not a gamer (although I raised a couple), but I understand this is a big deal (life and death) ... but not an audio thing. Its a hand-eye thing, if you will. Yes, of course, you might want the audio to sync (which is why this feature is in modern receivers and processors), but that's not what we're talking about when you say "input lag".

Now, to put this in a context that pertains to the readers of this forum watching movies. There is no delay time required video processing involved in playback of a 1080p/24fps Blu-Ray through a display that is 1080p and supports 24fps. And beyond that, even playing DVD's at 480i/60fps on a 1080p display will not take enough video processing time to require audio delay (anything under 30ms is considered below our perception threshold).

Hope this clarifies - good luck with the issues you are having on your system.

I just upgraded my screen to a Sharp 70 inch (from a Pioneer 50 inch). Same receiver, same speakers. Suddenly I had a nightmarish lipsync problem, even using return audio on HDMI. I called the Geek Squad at Best Buy (where I bought the TV, and who set it up for me) and the first thing they asked me when I called was - "Is it a Sharp?" Net net, apparently some TVs have a serious lipsync problem compared to all the rest. Because they sell a lot of Sharp, it's their first suspicion. Their recommendation was to do fiber optic or coax return from the TV, and said it always works.

It did. But I am genetically unable to leave well enough alone when I think it should work better in a different way.

A bunch of fiddling around with settings overall (using calibration info from others with similar Sharp screens), and suddenly I had no lipsync problem at all with return HDMI. I suspect that the default shipping settings for TVs aren't just hideous for video (eye-searing white balance and brightness) but also for audio. It seemed to me that the video mode (movie versus whatever) affects sound, as do a dozen other things.

I'm sure it's not your speakers. I had lipsync problems with and without my Triton 2s, and with and without other speakers. I'm convinced that the current state of the art is plug and pray, not plug and play.

Good luck. Kick everything - and I mean EVERYTHING - back to defaults and go from there. Who knows what weird setting is hiding seven menus in.