What settings are you using? I have a D2 and also going through a preamp, mine are:
Volume Control: Off
Analog Audio Output Level: Low
De-Emphasis for 44.1kHz CD Files: Off
Digital Audio Output: Off
MQA Mode: Analog Output
Ultra-sonic Filter for DSD Playback: Off
Re-Sampling: Off
Just in case one of these is the culprit. I realize it’s not the same as the T2, but bass has been quite good for me. I really haven’t tried toggling these other than setting the output to low gain and turning off volume control otherwise the gain through my preamp cranked the volume to insane levels, as it is I don’t go above 1/3 otherwise neighbors get super grumpy. Anyway hoping it’s just a toggle setting. Oh my use case is 99% stream tidal hifi/master.
Volume Control: Off
Analog Audio Output Level: Low
De-Emphasis for 44.1kHz CD Files: Off
Digital Audio Output: Off
MQA Mode: Analog Output
Ultra-sonic Filter for DSD Playback: Off
Re-Sampling: Off
Just in case one of these is the culprit. I realize it’s not the same as the T2, but bass has been quite good for me. I really haven’t tried toggling these other than setting the output to low gain and turning off volume control otherwise the gain through my preamp cranked the volume to insane levels, as it is I don’t go above 1/3 otherwise neighbors get super grumpy. Anyway hoping it’s just a toggle setting. Oh my use case is 99% stream tidal hifi/master.