Not too loud but enough to stop me getting distracted when writing documents.
Plexamp on MacBook Air with audio captured using Airfoil. Sent to an old Apple TV 2nd Gen with optic to analogue converter. Played out of a Sony mini-system c2004 and old Mission bookshelf speakers. Welcome to my home office, the graveyard of old but working kit*.
I could've done Plexamp from the Mac Mini and used direct optical to the mini-system, but I'm double screening the documents from my work PC. I'm surprised I have time for writing docs when I've these old toys wanting to be played with.