DT 770 Pro 32 Ω on an Audient EVO 8: the 1/8 rule, finally with numbers on both sides
Loud enough for everyday listening, with little spare for peaks. The EVO 8 reaches about 110.7 dB on the DT 770 Pro 32 Ω. Those are the published figures.
The Audient EVO 8 will play the Beyerdynamic DT 770 Pro 32 Ω loudly enough for most days. What you do not have is a comfortable reserve when the music suddenly gets much louder.
The DT 770 Pro 32 Ω is 32 Ω. Reaching a 110 dB peak — a loud moment in film or classical, not a casual average — takes about 0.90 V from the source. The EVO 8 gets to 110.7 dB on this load.
Separately, the output impedance is 50 Ω into 32 Ω headphones. On a dynamic driver that ratio can lift or dull the bass. It is a note about tone, beside the loudness result, not a replacement for it.
On compressed pop you will not notice. On classical or a film mix the volume control will sit high. Buy a headphone amp if you want those peaks clean. Do not buy one because someone said every 32 Ω headphone is impossible from an interface — that is not what this pair does.