The headphone output from the dCS website:
Headphone Outputs
1 stereo balanced pair on 1x 4-way male XLR connector. 1 stereo unbalanced pair on 1x 6.35mm (1/4”) 3-pole jack. Full-scale output levels are 1.4W rms into 33Ω, 0.15W rms into 300Ω. Output levels are 0, -10, -20, -30dB, set in the menu. Minimum headphone impedance is 33Ω.
This is identical output power to Dave - and is presumably in balanced mode against Dave's more transparent single ended. Note also that the minimum headphone impedance is 33Ω, suggesting that it doesn't have much current output (Dave's is 8Ω).
Wow, so many headphones are 32 ohms (like Grados) and are below their minimum threshold...not good.