Phono volume low / max level adjustment?

[PetyMety]

Iam sure it is an MM cart
Im afraid i do not have access to another phono to check.

Dou you have any idea, if there is a problem to go above 0db at the devialet?

i will check another place for the phono because it stands on the same lowboard as the speaker and it seems to make problem beside the volume because the speaker freaks out because the frequencies interacting with speaker and phono