How to make volume quieter?

[ai4281]

I use my Diamond with my noise-isolating pair of Shures, and it's way too loud for my taste... even at 1 bar in the volume menu.

I usually end up going into the sound pref, and scroll the volume down to 1%, but even that is kinda loud to listen to music in the library, or in my room.

Does anyone know a fix to this problem? Making the general volume quieter.

Thanks.