I am talking about the e.g. XR-55. Just run digital-in - analog-in sucks.
I was told that e.g. running 3 of them in a multichannel setup ( fired by 3 digital outs e.g. RME) were
performing better than the TACTS these guys used to run before.
I had a chance to listen to a full digital chain from Uli Brüggemann. (TACTS and RME card actively phase linear filtererd on the
PC). This I would call agressive.
I never heard better and more "shockingly" transient response before caused by the
linear filters and the PCM2PWM conversion.
With HDMI you need to be careful though, you need to check if it supports Multichannel-PCM properly - Stereo is not an issue.
I am digging into it by myself right now.
I decided to give up on HDMI and multichannel bit-perfect audio. I dont need such high quality for movies
Virtual dolby would work good enough, really.
BTW the newer TDAI is better than all TACT. If they were running the millenium mk2 or mk3, then it's another matter.