Jonathan, thank you very much for the detailed response - very helpful.
One question about loading on the secondary - to get a 1:10 step up down to 10 Ohm loading one would have to use a 0.5 - 1 KOhm loading on the secondary. Problem is that most 1:10 step-ups aren't really optimized for such a low secondary load. 5-15 Ohm loading seems still pretty low, with an internal impedance of 8 Ohm for the Delos I would have guessed 15-100 Ohm loading with a step-up (without any direct experience).
Thanks again,
Rene
One question about loading on the secondary - to get a 1:10 step up down to 10 Ohm loading one would have to use a 0.5 - 1 KOhm loading on the secondary. Problem is that most 1:10 step-ups aren't really optimized for such a low secondary load. 5-15 Ohm loading seems still pretty low, with an internal impedance of 8 Ohm for the Delos I would have guessed 15-100 Ohm loading with a step-up (without any direct experience).
Thanks again,
Rene