JBL LIVE 400BT vs JBL Tune 670NC at a Glance
• JBL LIVE 400BT — biggest strength: Ambient Aware and TalkThru plus a 3.5 mm cable that lets you keep listening when the battery runs out.
• JBL LIVE 400BT — biggest trade-off: No noise cancelling at all. The "noise control: None" field is literal — you get ambient pass-through, not blocking.
• JBL Tune 670NC — biggest strength: Adaptive Noise Cancelling and up to 70 hours of battery life, with a newer Bluetooth 5.3 radio.
• JBL Tune 670NC — biggest trade-off: The headline battery figure is quoted with ANC off, so heavy noise-cancelling use will pull that number down.
• Who each is for: LIVE 400BT suits someone who wants awareness and a cord; Tune 670NC suits someone who wants quiet, endurance and modern wireless.
The LIVE 400BT is an on-ear Bluetooth headphone built around 40 mm dynamic drivers, a 32 ohm impedance rating, 106 dB sensitivity and a 20 Hz–20 kHz frequency range. In plain terms, that's an efficient, easy-to-drive headphone — the kind of tuning JBL describes as its signature sound. It's an adult-oriented, on-ear design in black with faux leather padding and a weight of 185.8 g, which is light enough to forget you're wearing it between tasks.
What it does best is awareness. Ambient Aware raises the sound of your surroundings with a button press, and TalkThru drops the music so you can hold a conversation without taking the headphones off. For a nurse that's genuinely useful — you can hear a call bell, a colleague or a patient without breaking your flow. Battery is rated at up to 24 hours, and a 15-minute top-up buys you roughly 2 extra hours. A full charge takes about 2 hours. There's also 3.5 mm jack support: when the battery is flat, you plug in the included aux cable and keep going. Calls are handled by buttons on the ear cup.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Who should buy it: anyone who prioritises staying aware of their environment, wants a physical cable as a safety net, and doesn't need active noise cancelling. Voice control is handled by tapping the ear cup to reach Google Assistant or Amazon Alexa, with the JBL app used to set your preference.
Who should skip it: if your main goal is to silence a noisy environment, this isn't the tool. There is no noise cancelling here, Bluetooth is version 4, and the 10 m wireless range is standard rather than generous. If you want to disappear into your own audio on a packed commute or a loud ward, look elsewhere.
The Tune 670NC is the more modern of the two, and the spec sheet shows it. It runs Bluetooth 5.3 with LE Audio support, pairs across a 10 m range, and is built on 32 ohm dynamic drivers with 98 dB sensitivity and the same 20 Hz–20 kHz frequency range. JBL calls its tuning Pure Bass Sound. It's an on-ear design too, but lighter at 174 g, with flat padded surfaces, a padded headband and a foldable build — plus a cloth carrying case in the box.
The headline feature is Adaptive Noise Cancelling. This is the real difference: the LIVE 400BT can only let sound in, while the Tune 670NC can actively shut sound out. It also offers Ambient Aware and TalkThru, activated through the JBL Headphones app, so you still get the awareness modes when you want them — you just also get the option to block. The app adds a Smart Audio & Video switch so you can prioritise sound quality or lower-latency video and gaming output.
Battery is the other headline: up to 70 hours, with a 2-hour charge time and a 5-minute quick charge that adds 3 hours. That 70-hour figure is quoted with Bluetooth on and ANC off, so expect less if you lean on noise cancelling all day — but even a heavily discounted version of that number is a lot of shifts between charges. Controls are button-based, with Google Assistant and Siri supported, and there's VoiceAware so you can hear your own voice on calls. You also get a detachable audio cable and a USB-C charging cable, plus a 2-year warranty versus the 1-year coverage on the LIVE 400BT.
Who should buy it: nurses and anyone else who wants to reduce background noise, wants the longest possible runtime, and wants current Bluetooth rather than an older generation. Who should skip it: if you specifically want touch-and-voice control, or you prefer the look and feel of a faux leather on-ear to a plastic, foldable one, the LIVE 400BT may appeal more.
• Best for blocking out a noisy ward → JBL Tune 670NC. Adaptive Noise Cancelling is the single biggest functional gap between these two.
• Best for staying aware of your surroundings → JBL LIVE 400BT. Ambient Aware and TalkThru are core features rather than app-dependent extras.
• Best for battery life → JBL Tune 670NC. Up to 70 hours versus up to 24 hours, though the Tune figure assumes ANC is off.
• Best for never being caught with a dead battery → JBL LIVE 400BT. The 3.5 mm jack and included aux cable mean you can keep listening wired.
• Best for modern wireless → JBL Tune 670NC. Bluetooth 5.3 with LE Audio beats Bluetooth 4 on longevity and future-proofing.
• Best for lighter wear → JBL Tune 670NC. 174 g against 185.8 g, with a padded headband and soft cushions for long sessions.
• Best for quick top-ups → JBL Tune 670NC. A 5-minute charge adds about 3 hours versus roughly 2 hours on the LIVE 400BT's 15-minute charge.
• Best for control style → JBL LIVE 400BT. Touch and voice control on the ear cup versus button controls on the Tune 670NC.
In my opinion, the JBL Tune 670NC is the better buy for most people, and it's the one I'd choose for a nurse working long shifts. Adaptive Noise Cancelling, Bluetooth 5.3, a much longer battery rating and a lighter, foldable build are the features that actually change how a twelve-hour day feels. The LIVE 400BT still earns its place if awareness and a wired fallback matter more to you than silence — that's a legitimate preference, not a compromise. But if you want one pair to do the heavy lifting, I'd go with the Tune 670NC.
For noise cancelling, battery life and Bluetooth version, yes — the Tune 670NC wins on all three. The LIVE 400BT counters with touch controls, a wired 3.5 mm fallback and a faux leather finish. Which is "better" depends on whether you value quiet or awareness more.
No. Its spec sheet lists noise control as "None." What it does have is Ambient Aware, which increases surrounding sound, and TalkThru, which lowers the music so you can talk without removing the headphones. That's the opposite of noise cancelling.
How long does the JBL Tune 670NC battery last?
Up to 70 hours with Bluetooth on and ANC off, per JBL's stated figure. With Adaptive Noise Cancelling active you should expect less. A full charge takes about 2 hours, and a 5-minute quick charge adds roughly 3 hours of music.
Both are on-ear headphones — neither is an in-ear or open-ear design. If you were specifically shopping for the best in ear earbuds for nurses or the best open ear earbuds for nurses, these aren't that category. On-ear models like these sit against the ear rather than inside it, which many people find easier to wear for a full shift.
I don't quote prices here, since they change constantly. Use the "Check latest price on Amazon" button on this page to see the current figure for whichever model you're leaning toward.
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