JBL Tune 670NC Adaptive Noise Cancelling Wireless On-Ear Headphones (Black) review

The JBL Tune 670NC’s practical distinction is that the manufacturer assigns separate ANC-on maximums to Bluetooth and cable listening: up to 44 hours for Bluetooth and up to 30 hours for AUX. Its higher 70-hour claim is Bluetooth with ANC off. The model is an on-ear wireless headphone, and the exact U.S. Black item assessed here is JBLT670NCBLKAM. JBL does not confirm passive listening after power-off or battery depletion, so the included cable should not be counted as a battery-free fallback.

Exact item and fit evidence

The U.S. product page calls Tune 670NC an adaptive noise-cancelling wireless on-ear headphone and identifies the Black item number. Selected U.S. pages separately identify Blue JBLT670NCBLUAM, White JBLT670NCWHTAM and Purple JBLT670NCPURAM; their exact manufacturer images appear below as finish references, not separate performance tests. The reviewed fact record remains anchored to Black. JBL lists a 32 mm dynamic driver and a weight of 174 g. This is a published comparison point, not a prediction of clamping pressure or comfort. As an on-ear design it rests on the ear rather than enclosing it, and fit depends on the wearer.

JBL describes adaptive ANC plus Ambient Aware and TalkThru, controlled through the JBL Headphones app. These manufacturer feature names establish available modes, not the amount of sound each person will hear or a measured cancellation score. The sources reviewed here contain no independent lab test or hands-on listening evaluation.

Bluetooth connection and runtime

The specification lists Bluetooth 5.3 and JBL says two Bluetooth devices can be connected simultaneously, with switching between a tablet video and a phone call as its example. That supports a two-device connection requirement, but not simultaneous music mixing. Bluetooth LE Audio appears with a qualification that availability is via a future OTA update, so it is not counted as a presently confirmed feature in this assessment.

For Bluetooth music with ANC on, JBL publishes an up-to-44-hour maximum. For Bluetooth with ANC off, the maximum is up to 70 hours. A buyer who sets a minimum for ANC use should compare against 44, not 70. The numbers describe different operating plans and manufacturer test conditions; volume, calls, ambient modes, connection behavior and battery age affect actual duration. JBL lists a two-hour charge time and a five-minute speed-charge claim, which are maker figures rather than measurements from this site.

Wired ANC is supported; passive mode is unknown

The product package includes a detachable audio cable. More importantly, the English specification sheet explicitly rates AUX with ANC on at up to 30 hours. That is a supported wired noise-cancelling plan with its own runtime, lower than the separate 44-hour Bluetooth ANC-on maximum. The comparison is useful only if the source device has a matching analog output or adapter; the product documentation reviewed here does not establish USB audio as an alternative route.

The same cable listing does not establish what happens when the Tune 670NC is switched off or its battery is depleted. The product copy recommends plugging in the cable, but the accessible U.S. page and English sheet do not explicitly promise passive audio in a dead-battery state. Therefore the AUX+ANC plan is a documented match, but an unpowered fallback is unknown. Anyone who needs battery-free audio should check that exact behavior before buying rather than assume every cable-equipped ANC headphone will play passively.

Package and comparisons

JBL’s selected U.S. page lists a USB-C charging cable, detachable audio cable, quick-start guide and warranty/warning sheet; no carrying case is named. Confirm the exact contents of a seller’s offer, especially if its condition differs from a new retail package. The multilingual quick-start guide linked by JBL was too large for the web reader to retrieve, so this review does not rely on it; the U.S. product page and English spec sheet supply the claims above.

Compared with earlier Tune 660NC, Tune 670NC weighs 174 g rather than 166 g, has Bluetooth 5.3 instead of 5.0, and lists 44-hour Bluetooth ANC and 30-hour AUX ANC rather than Tune 660NC’s 44 and 35 hours. Against Live 460NC, its Bluetooth ANC-on ceiling is four hours higher, but it does not have a documented battery-flat listening fallback. These figures are not comparative sound or cancellation tests, and “higher” is not a comfort verdict. The choice turns on the exact connection and power state a buyer needs, plus how an on-ear fit works for that person.

Primary evidence: JBL’s U.S. Tune 670NC Black page and English specification sheet. JBL’s linked multilingual quick-start guide could not be retrieved in this pass because the web reader rejected its size. This is an evidence-based assessment, not a hands-on test.