5 sourced reports, with what to check before you buy. Each one links to the page it was reported on.
Costly or dangerous
Both earbuds emit painfully loud high-pitched ringing noise after ~4 months
Best Buy customer review (1-star). Owner reports both earbuds intermittently emit a very loud high-pitched ringing noise regardless of volume setting, painful to the ear, appearing after ~4 months — past the return period.
What to check. This is a safety-relevant fault: loud unexpected tones at full amplitude regardless of volume. It appeared after the return window, so the owner was stuck with a defective product. Buyers should be aware that defects may surface after the return period and require warranty claims.
Left earbud emits terrible static sound triggered by walking or bus vibration within 3 months
Amazon SG customer review from Japan (Oct 2024). Owner reports the left earbud produced painful static noise triggered by physical movement (walking, bus vibration) within 3 months of careful use. This is the owner's second Jabra pair to fail within a year.
What to check. The static is triggered by physical motion, suggesting a loose internal connection or defective driver. This failure appeared within 3 months — well inside a typical warranty — so test under movement (walking, public transport) early and claim warranty if it occurs.
Right earbud emits constant black noise in ANC and hear-through modes
Amazon AU verified-purchase review (April 2024). Owner reports persistent static/white noise in the right earbud whenever ANC or hear-through is active, persisting after firmware reinstall. The reviewer notes this appears to be a common issue online.
What to check. If buying, expect that ANC/hear-through modes may produce audible static in one earbud. Test ANC immediately within the return window; firmware reinstall does not fix it per this owner. Jabra customer support reportedly did not resolve it.
Left earbud hisses in ANC mode; suspected firmware problem
Alza.cz verified-purchase review (Czech, Feb 2024). Owner reports the left earbud hisses in ANC mode and notes other reviews attribute it to a firmware problem. Same owner also reports handsfree microphone failure (other party cannot hear) and earbuds falling out during sweaty exercise.
What to check. Corroborates the ANC static/hissing fault reported by other owners. The reviewer also flags a handsfree microphone issue and sweat-related fit failure during exercise — relevant for a product marketed for sports use. Test ANC and call quality within the return window.
Official Jabra support page listing firmware update contents. The update log shows Jabra has shipped fixes for ANC call performance, wind noise reduction in ANC/HearThrough, and microphone noise cancellation — consistent with owner-reported ANC-related noise issues.
What to check. The manufacturer has been patching ANC and noise-related behavior via firmware. Buyers should ensure the latest firmware is installed, but note that owner reports (e.g., the Amazon AU review) indicate firmware reinstall did not resolve the static issue for some.
These reports come from the pages linked under each item: owner forums, repair guides and workshops. They are not a diagnosis of any one unit, and a careful check of the one you are buying still applies.
Text from the Kriko Premium earbuds catalog, version 0.1.1, under the CC-BY-SA-4.0 license.
