The JBL Tune 770NC’s sound profile (when EQ is disabled and connected over Bluetooth) sounds relatively neutral, with an additional dose of rumble and a fairly excited top-end. Their bass has a good amount of rumble and boom without overwhelming other frequencies. The high-bass frequencies into the low-mids are very slightly under-emphasized to avoid muddiness. Otherwise, the mids reasonably adhere to a neutral mid-range for natural-sounding lead and melodic instruments, although they’re a bit pushed down by the treble. Most of the treble is over-emphasized for bright and clear articulation of vocals, except for a dip where the low-treble transitions to the mid-treble, dulling details on vocals and impacting presence. Meanwhile, the rest of the top-end comes across as considerably excited, shrill, and piercing on elements like cymbal hits.

They sound virtually identical when you use them over Bluetooth as they do when connected via their analog cable and powered on, but, as you can see here, their bass and treble are more subdued when used passively. Unlike the JBL Tune 760NC Wireless, the manufacturer’s app is compatible with these and provides EQ presets to modify their sound profile somewhat, in addition to a custom equalizer; you can see the preset EQ frequency responses here. If you listen to the headphones in ‘Ambient Aware’ mode or with noise cancelling turned off, they sound the same, but they’re less rumbly than with noise cancelling enabled, as shown here. Lastly, like most Bluetooth headphones, if you’re on a call, their frequency response changes to cut out the lows and dramatically reduce the highs with an overall volume drop, compared to their standard voicing.