Direct answer
For the Sonos Move 2 speaker, source balance, mono/accessibility, cable/earbud contact, pairing and driver hardware should be separated. First, swap ears/channels and test another source.
What this covers
- Sonos Move 2 speaker (Move 2)
- Sonos product; Wi-Fi/Ethernet, Bluetooth, voice, home-theater and line-in capabilities vary.
- The specific fault this record addresses: plays from only one side or channel
What it does not cover
- ×The same symptom on a different Sonos product line, which has its own record and its own cited source
- ×An on-screen error code whose meaning has not been checked against this exact model's manual
- ×Live electrical, gas, sealed-system, internal battery-cell or structural repair — a technician boundary, not a self-service step
Differential
What actually causes this, and how to tell them apart
These are ordered by how often each one is the answer, not by how easy it is to try. The point of the middle column is that two causes producing the same headline symptom rarely produce the same detail — that detail is what tells you which one you have before you change anything.
- 1
The balance control has been moved
What separates it One side is quiet on every accessory and every app, not just this one.
How to confirm Both iOS and Android have an audio balance slider in accessibility settings that is easy to move by accident and affects everything. Check it before assuming hardware.
- 2
The two speakers are bonded as a stereo pair and one is not playing
What separates it Two portable speakers used as a left/right pair, and only one is producing sound.
How to confirm A bonded stereo pair splits the channels — one speaker plays the left channel and the other the right — so a mono source or one speaker dropping off the network leaves a single side playing. Check both speakers are grouped and online in the app, and test with a stereo track.
- 3
One driver in a stereo portable is blocked or has failed
What separates it One side of a single unit with left and right drivers is quiet, on every source, with the balance centred.
How to confirm Some portable speakers carry separate left and right drivers in one enclosure. Confirm nothing is covering that side of the grille and the balance is centred; a driver that stays silent on every source once routing is ruled out is a service matter.
Before you touch a setting
Record this first — changing settings destroys the evidence
Every item below stops existing the moment a reset, re-pair or settings change is made. Written down first, they are what separates the causes above; recovered afterwards, they are guesswork.
- Whether the same physical side is always affected, or whether it swaps.
- Whether the problem persists with a different source device and a different app.
- Whether the accessibility balance slider is centred.
- Whether the silent side is completely silent or just quiet and muffled.
Check the audio balance slider in the phone's accessibility settings
ReversibleIt affects every accessory and every app, is easy to move by accident, and is free to rule out.
Test with a different source and a known stereo track
ReversibleSome recordings and some app settings genuinely play to one channel.
Model-specific
What is true of this model and not of its siblings
Generic advice for the product line fails here. Each item below is a property of this specific model family that changes which of the steps above apply to you.
- Model scope
- Move 2. Sonos product; Wi-Fi/Ethernet, Bluetooth, voice, home-theater and line-in capabilities vary.
- Type — portable battery speaker (WiFi + BT)
- A portable, battery-powered speaker that works on WiFi at home (full Sonos app/multiroom) AND Bluetooth away from WiFi. Weatherproof for outdoor use. So it has both battery symptoms (runtime/charging) and Sonos WiFi symptoms.
- WiFi vs Bluetooth modes
- On WiFi it behaves like any Sonos (app control, grouping); switch to Bluetooth for use away from your network. Battery drains faster on WiFi streaming with voice than on Bluetooth. Returns to the charge base/USB-C to charge.
- Charging
- Charges on its ring base or by USB-C; a speaker that starts sessions low is not fully seating on the base — the reason it seems to have short runtime.
- Power path
- Internal or removable battery. Every capability that costs current — night vision, higher stream quality, longer recordings, frequent events — is paid for in runtime, so a change in behaviour after a settings change is usually a power consequence rather than a fault. Cold weather reduces usable capacity sharply.
- Symptom boundary
- This record covers Sonos Move 2 speaker when it plays from only one side or channel. A different symptom on the same hardware, or this symptom on a different Sonos product line, has its own record with its own causes and its own cited source.
Stop boundary
When this stops being a self-service repair
Continuing past any one of these costs more than the repair saves — in safety, in warranty, or in evidence a technician needs.
- !Do not push anything into an earbud's sound outlet to clear it — use the manufacturer's cleaning method, since a punctured mesh cannot be repaired.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Where the manufacturer's article stops. Sonos publishes this as "Low audio from surround speakers when listening to music". Sonos' article on one channel or side playing quietly or not at all in a home-theater set. Probed 2026-08-21: title-verified. What that article does not carry is the model boundary — it is written for a product line, and Move 2 is the scope applied here. Where a control label, terminal, indicator pattern or reset sequence differs on your unit, the manual for that exact model is the authority, not this page and not the article.
Exact questions
Common follow-ups
My Sonos Move 2 battery doesn't last as long as I expected.+
Runtime depends on how you use it: streaming over WiFi with the microphone/voice active draws more than Bluetooth playback at moderate volume, and loud volume drains it fast. The rated figure is for moderate use. Make sure it is returning to a full charge on its base (a Move that does not seat fully starts partly depleted), and use Bluetooth and lower volume to stretch runtime. A big long-term drop means the battery has aged.
I paired two portable speakers for stereo and only one plays.+
When two speakers are bonded as a stereo pair, one takes the left channel and the other the right, so a mono source or one speaker dropping off the network leaves a single side playing. Confirm both are still grouped and showing online in the app, and test with a track you know is in stereo — a genuinely mono source has nothing to send the other side.
Does this answer apply to every Sonos model?+
No. It is scoped to Move 2. Sonos product; Wi-Fi/Ethernet, Bluetooth, voice, home-theater and line-in capabilities vary.
What should I record before troubleshooting one side or one earbud?+
Record the complete model identifier, exact message or indicator, software/firmware where visible, the operating stage and what still works.
Why is a factory reset not the first step?+
A reset can erase accounts, networks, maps, schedules or preferences without distinguishing one side, one earbud. The ordered checks preserve that evidence.
When should I stop and use qualified service?+
Stop for heat, swelling, liquid or exposed wiring.
Answer for the exact device and software version shown above.