Band: opinion spread · Dot: weighted average
Sources split, and the split looks like an EQ setting rather than a disagreement about the hardware. Most reviewers, and SoundGuys' measurement, find the default JLab Signature tuning bass-forward — full and warm, sometimes loose or a little muddy. A lab test and several out-of-the-box impressions find it lean, with the bass only arriving after a trip to the app's EQ or the Bass Boost preset.
Measured
SoundGuys' head-rig measurement shows the bass 2–5 dB above its preference curve from 300 Hz down to 20 Hz, plus a 100 Hz bump that appears when ANC is switched off. eCoustics hears the lift centred near 150 Hz, with roll-off below the mid-30s Hz that its custom EQ couldn't restore. Labo Fnac scores frequency response 6.7/10 and calls the bass neglected.
vs. listeners — The two lab results disagree: SoundGuys measures a bass shelf above target, while Labo Fnac finds the bass under-served. Neither says which EQ preset was active, and the presets differ a lot: JLab Signature is the default, Balanced is brighter and leaner, Bass Boost adds more, and Custom removes the company's EQ altogether. CHIP.pl, How-To Geek and several owners heard it lean at first and changed their minds after adjusting the EQ, so the preset — and how well the small cups seal — is the most likely explanation.
“Here, we can see that the JLab JBuds Lux ANC have some bass emphasis — about 2-5dB over what we like to see — from 300Hz down to 20Hz.”
SoundGuys (Christian Thomas)
“Quant au son, Jlab continue malheureusement de négliger les basses, ce qui ne donne pas beaucoup de dynamique aux morceaux qu’on peut écouter avec ce modèle.”
Labo Fnac (Jean-Charles Frelier) — “As for the sound, JLab unfortunately keeps neglecting the bass, which doesn't give the tracks you listen to on this model much dynamism.”
