I just bought them! I am very very happy with them.
So - to explain again the rationale here - first of all, it is really really bad for tubes to be turned on and off many times (I think this applies to some tubes, not all, but I have the ones that are sensitive to turn on). A tube pre can last for many many years if not switched on or off many times per day. So I try to leave the tube pre on for the day once I turn it on. Maybe I want to catch 10 minutes of news while eating breakfast, do I then have to leave my whole system on all day? I can awkwardly reach around and turn off the Amp at least (the heat sinks sort of scrape your arm up a bit if you try that and aren't a gymnast), as a Class A amp left on all day ends up costing a pretty penny to electricity company, I do have a main system on/off switch, but then the pre goes off, and then on again later in the day.
There has to be a simple way to catch a half hour or 10 minutes of TV without getting a whole massive system involved. I might also come home late and watch 20 minutes of TV before retiring for the night, and again, why put the tubes through and on/off cycle for 20 minutes of TV (not music!).
So, my Harmony remote is programmed to have two AV modes: "Watch TV small", and "Watch TV large" - those becoming the words on graphical buttons. The 'small' routes the sound through the little speakers, changes outputs on my video scaler to accomplish that (perhaps equivalent to AVPre/Pro if you use one), and all is good. Watch TV large on the other hand, turns everything on and routes the AV sound through the main system. Of course there are other settings such as "Listen to CDs", etc.
It is wonderful to, with no additional watts, have simple sound for basic TV. It simplifies the system quite a bit. And on super hot days, one might not turn on a Class A amp until after 5, for example, or until direct sun is off the house, when it is high 90s outside. Lots of use cases for me.
And I don't take the electricity thing lightly. I'm at 355 watts using TV + video scaler + Cable Box (my Plasma is quite old at this point, and a new one should use 1/3 the watts of my current one I think), and at full go with everything its just under 1000 - so big difference.
BTW, off-topic random comment - for system integration I super-highly recommend the Logitech One. The 900 adds RF and the four colored buttons some Cable boxes or simlar require. Many go with the 8 times more expensive square/rectangle other remotes that are super high end, but the Harmony One has come through for me on all accounts. My wife can do anything with the system no problem once I got that configured right - and overall, assuming you have a few Saturday's to play with it, you can program it yourself and don't need the installers to come out for every little change like many do with the expensive square ones.
Anyhow, so far loving the A'Diva ti!
