I am looking for a 2x100 watt or so power amplifier with auto on/off functionality, just like most subwoofers, and available on the EU market. This is for use in the bedroom. I am currently using a 2x25 watt Ava Maestro 50 amplifier with this functionality, driving a pair of modest Q Acoustics 3010 speakers using a Chromecast Audio as a source. However, we are planning to move into a larger bedroom and are considering using my rather ineffficient Harbeth P3ESRs for much better sound quality. I don't want to spend a fortune. It really baffles me why there are so very few amplifiers with auto on/off. It would seem to be so attractive to have and then put the unit somewhere out of sight for less visual clutter.