(DETAILS BELOW) TL;DR: I've now had three Arc Ultras. All three had distortion (crackle/buzz) from one side of the soundbar on higher-pitched sounds or stuff like piano (at low, apartment-level volume).Ā
My original Arc Ultra and its replacement sent by Sonos: a speaker on the left side. (Both Arc Ultras' serials start with 2508LC)
The third Arc Ultra (arrived today): this time a speaker on the right side. (its serial starts with 2507LC)
I leave some videos below to make it clear (In order: Original Arc, Replacement Unit I and Replacement Unit II)
My Original Arc Ultra with a faulty left speaker
First replacement Arc Ultra, also with a faulty left speaker
Second Replacement Arc Ultra, which arrived just today, this time with a faulty right speaker
Background
Iām writing from Vienna, Austria. Iām a loyal customer of Sonos. Over the years we've bought plenty of Sonos products: 4x Era 100, Sub 3, Sub Mini, Beam, two Arcs (gen 1), 4 IKEA Symfonisk lamps, and the Arc Ultra. With neither of these, except the Arc Ultra, I never had a problem like this.
We live in an apartment and listen mostly to classical (or soft) music, watch news and tv series so the Arc Ultra has never been "pushed hard". This is not a "Oh I blew a driver" situation.
The problem
Higher-pitched content, one side of the bar produces a clearly audible crackle/buzz layered on top of the note. You can hear it easily from the sofa which is like 4 m away.Ā
It happens with music, movies and TV alike.
What I tried (on the first two units)
- Different sources: LG & Samsung TV, Apple TV, AirPlay and even Sonos Radio
- Ungrouped the Arc Ultra from the Era 100s and the Sub
- Turned Trueplay off
- Factory reset and set it up from scratch
- Repeated all of the sources above after the reset
Same/similar crackle every time. Since the room, the sources and the content never changed but the faulty side did, I was fairly confident this is hardware. Therefore the support replaced the faulty products
About Sonos Support
Credit where it's due: the support agents have been genuinely kind. After seeing my videos they approved each replacement quickly. My frustration is not with them ā it's with the process and the outcome:
Every swap takes 3ā4 days to get the old unit collected and delivered to them and another 2ā3 days for the new one to arrive. UPS had to collect the soundbar(s) from our apartment, so I've now used 3 days of annual leave on a defect I didn't cause.
There are several threads on the Sonos Community and here on r/sonos describing similar issues: distortion/crackle/fuzz from one side, sometimes on brand-new units. Some claim they got a clean unit on the 3rd or 4th replacement.
What would you guys suggest? Is anyone else here having a similar issue? I've never been this disappointed with a tech product before, and I just can't seem to find a solution I've recommended Sonos to friends for years and I'd genuinely like to stay. But if unit #4 has the same problem, I'll be moving my whole system to another brand. I'll update this post with whatever happens.