Preamp with selectable outputs?

If the 2 amps have a 12V trigger switch, that could be way less than $2k, but not really with a remote.

And it would still require flipping a switch which is not much easier than powering the amps up.

I suppose if there are not 2 amp outputs, then you would need a pair of Y-connectors behind the preamp.

My preamp has a couple of amp outputs, but I have to haul myself out of the chair to do that, as the remote does everything but which amp gets the output. 

I would call a pro audio store like Sweetwater and ask if they have a remote controlled out put switcher.

Why is this such a rare/non-existent feature? It seems like it would be useful… unless I’m just looking at it wrong 🤷🏻‍♂️

It is not that common a requirement and adding switches can compromise the sound quality.

I simply use cable splinters on my office system to go to my amp and headphone amp. Then I can use either. There are one piece gold splitters so one cable plugs in directly and another tap sticks out at 90 degrees. They work well. 

I was once told that when connecting two amplifiers to a preamp having two outputs run in paraellel that the imput impedance of both amplifiers have to be considered in reference to the output impedance of the preamp even when using only one amplifier at a time.

If this is true, the amplifier having the lowent input impedance will have the greatest influence on the total impedance seen by the preamp.

Take a look at the Schiit Sys. It does nothing but switch two outputs.