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Sennheiser CX 350BT (Black)
Model: CX 350BT Black 508382 · US configuration
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CX 350BT Black 508382 is an earlier, end-of-life sealed-tip Bluetooth neckband with an SBC ten-hour manufacturer maximum. Its SEBT1 manual adds AAC, aptX and aptX Low Latency to the codec list, but that ten-hour figure applies only via SBC.
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Assessment scenario: Earlier sealed SBC neckbands without ANC
An editorial assessment scenario for someone who permits earlier models, wants a sealed in-ear fit, excludes active ANC and selects SBC over Classic Audio. It is not a statement of the visitor’s intent, a fit guarantee or evidence of live availability.
Explore this buying guide ↗Why consider this model?
- The exact SEBT1 manual identifies a neckband cable and ear-canal coupling with XS/S/M/L adapters.
- Its specification table lists SBC/AAC/aptX/aptX Low Latency and up to ten music-playback hours via SBC; this assessment treats the SBC codec plan separately from two-device multipoint.
- Sennheiser’s matching model page describes two simultaneous device connections; that is a connection count, not two concurrent music streams.
Tradeoffs to weigh
- A sealed tip is a design description, not a promise of personal comfort, seal or retention.
- No ANC mode, IP water rating or charging case is documented; the manual says to keep the product dry.
- The ten-hour maximum is SBC-only and is not independently tested; AAC/aptX runtimes and remaining capacity of an older battery are unknown.
- No reviewed source combines codec/runtime with the two-device arrangement.
Check these before ordering
- Match U.S. Black article 508382 and variant 45465058410779; White article 508383 is a separate finish row.
- Ask about battery condition, the USB-C port, included cable/tips, return rights and seller warranty.
- Verify that both ends support the intended codec; aptX Low Latency also needs a compatible host and does not guarantee universal video sync.
- Check that a cable-linked neckband and absence of a stated water rating meet your use case.