15.8 firmware

Noticed that the sound on mine had harsh treble again so I turned off truplay and sound went back to normal 

with truplay on I had to turn treble to -5 and turn bass up 

tried on my arc movie only system and my 2 5s both have subs attached 

so if you have truplay turned on turn it off see if the rich bass returns

i think you are wrong the make a big change in the sound profile my sonos rear one are sound different after the update.

Turned off Trueplay and volume has improved, not sure if it's as loud as before yet. 

Sounds much better without Trueplay currently, definitely wasn't the case before so seems like my Trueplay has gone weird with the update (in comparison it's quite treble heavy and harsh). Strange. Don't currently have an Apple device to redo Trueplay.

Yeah, I noticed a big drop in bass on my dual sub setup. Trueplayed and not trueplayed.

i know sonos a lot of year. the 15.8 update is the worst update ever.

connect issue to my tv 

the change the sound profile for worse low bass low volume the rear speaker behave differently and more worse then before.

the right thing is let customers to go back to 15.7 and fix 15.8 frimware. 

I have redone truplay and it went worse also redid it using ios16 on my iPad it is still bad

for now going to leave truplay off it sounds better 

I’m not having any of the issues mentioned, but just to add my Sonos HT rooms have all had Trueplay in situ probably for several Sonos updates now and the Sub (gen3), bonded to the Arc & Surrounds, sounds fine to my ears. I have the Sub volume and Bass EQ set at zero - if I increase the Bass to +2 and the Sub level to +7, then it’s far too much for how I like to listen to music/TV audio - the Treble also seems fine to me at zero. I’ve not noticed any sibilance, for example.

I can’t say I’ve noticed any recent changes at all. I do find it difficult to comment on volume levels because in my own experience, audio sources, music and TV, can vary so much by channel/show/movie/codec/source-device etc; but generally speaking, the TV volume-level in the App usually sits somewhere between 35% and 45% - We do use ‘night mode’ when watching the TV in the evenings so as not to disturb people sleeping, or neighbours, - the drop in Bass is very noticeable when that feature is enabled. I rarely use ‘speech enhancement’ as the Wife & I tend to prefer that feature disabled, the speech audio from our LG TV/Arc seems to be quite natural and clear enough without it, again though this can vary by source, but generally, it’s fine.

I get the sense that there is also a push in lowmids going on. 

It's like they confused teh big sub with the minisub in the soundproflie. 

That’s the big problem with Sonos…they are constantly changing sound or volume. You never know what you’re going to get with these freaking to many updates…

Sonos has, to my knowledge, only changed the sound profile on the Arc a couple of years ago. There’s only a couple of mentions of people noticing a change now, so it is not clearat this moment if there really has been an intended change.

I trust Sonos the updates I receive are necessary, either for computer safety reasons, stability of the service or for adding new features. There have been instances where Sonos has been pushed take away features too, but that’s inherently linked to changing circumstances. So, based on this trust (and my lack of knowledge about Sonos’ processes) I cannot say there are too many updates.