Any amp that supports HDMI ARC or HDMI CEC as long as TV does, my TV picks up any device plugged in as a Anytime+ (HDMI CEC) device and allows the TV remote to alter the volume on-screen, this is on a Samsung TV. Also works on my Soundbar which is cool.
"The power of ARC
ARC can simplify your home theater system in two important ways. The first, and perhaps most useful feature that ARC brings to the table is the aforementioned organization of CEC for single remote command.
The most common employment of single remote command would be for users who have supplemented the shameful audio of their flat screens with a sound bar, sound platform, HTIB, or other secondary audio device. As long as both devices are equipped with ARC, simply connecting the component to the TV’s ARC HDMI port will allow for control of power, volume, and other features from your TV remote. In most cases, it will also simply transfer your TV audio to the unit automatically, without having to deactivate the TV’s on-board speakers."