Howdy Michael,
I spent some time picking @tedsmith’s brain at Axpona about the TSS so I can chime in and he can let us know if I miss anything.
First off, the RCA output from the TSS will be the standard 2 vrms instead of the lower 1.5 or so that the DSD and DSJ currently provide.
Also, there will be a couple other quality of life improvements - instead of just one attenuator option, you’ll be able to switch between 10, 20, and 30 dB pads.
So the TSS should be much more friendly to headphone systems.