This info referring the Okto DAC being a Headphone Device as well, is very appealing as I am to be in temporary accommodation for a period of time, hence the interest in the devices dimensions.
The main system is to be packed away, and a miniature system is to be used for Headphone Listening in the new abode.
The intention is to then use the miniature system as a second set up, that is easily concealed in a selected space in the renovated home.
I have explained to my wife, we can use ceiling speakers for all over the home supply of sound and have a typical stereo set up, from the non-valve device concealed system.
I will be trying to wean my wife away from Alexia and use this new set up. She is not confident with the Main Systems Valve Devices, she knows my disciplines around them and does not like to have the responsibilities, I make known are best to be followed.