@amirm, in your "Headphone Amplifier Signal to Noise Ratio at 50 mV" graph, you had shown:
"MassDrop THX AAA 789" achieving 90
and also
"Drop THX AAA 789 Bal" achieving 84
Is the SNR of 90 achieved with single-ended headphone output? If that is the case, does it mean that single-ended...