Nice speakers! I'm guessing the model, if correct here are some spins for those interested https://www.erinsaudiocorner.com/loudspeakers/jbl_4329p/
Weird you can't limit digital output. I also listen mostly at low volumes and have the same issue. Part of the reason I chose Sonos is this is built in across all products, alongside an effective loudness toggle. This has been particularly helpful with some little Genelec 8010s I use as desktop speakers plugged into a Sonos Port.
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