First off let me say I’ve personally installed 4 or 5 Arc+Sub Gen 3 systems so I know what it should sound like and am aware what performance to expect from the sub. I’m Just not getting it on my system.
My typical configuration is Arc + Connect: Amp (surrounds) + Sub
Very low output from the sub. Doesn’t matter the source (TV eARC, Airplay, or native music in Sonos app)
To even hear it the slightest it had to be turned up to at least +8
I’ve factory reset everything (Arc, Amp, & Sub) to no avail. So I tried an experiment. I removed the sub and amp from the Arc and made the Connect: Amp it’s own room. I connected the sub to it and WOW! You can feel the bass. It’s the way it should sound. So I go back in and create my surround setup again by connecting the sub back to the Arc and making the Connect: Amp the surrounds. Sub back to its old ways. Very low output. So the sub clearly works. It’s not placement, it’s not poor Wi-Fi. It works correctly with other Sonos products, just not with the Arc.
Best answer by Corry PView original