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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-27 · 7 min read · Independent comparison
• H HIFIHEAR KZ EDX PRO — biggest strength: a 10mm dual magnetic circuit dynamic driver tuned for powerful low end, plus a detachable 2-pin cable and a 3.5mm plug that works with almost anything.
• H HIFIHEAR KZ EDX PRO — biggest trade-off: it is a sealed in-ear design, so it physically blocks outside noise. That is great for music, less great if you need to hear a car or a colleague.
• Middle Rabbit S6 — biggest strength: an open-ear hook design at roughly 7g that leaves your ear canal completely free, backed by an extended boom microphone built for voice calls.
• Middle Rabbit S6 — biggest trade-off: open-ear means almost no passive noise isolation, and with no noise control at all, loud environments will bleed into whatever you are listening to.
• Who each is for: pick the KZ EDX PRO if music and bass come first; pick the Middle Rabbit S6 if awareness and call clarity come first.
The KZ EDX PRO is the upgrade model in this comparison, and the headline change is the driver. It uses a 10mm dual magnetic circuit dynamic unit, and that extra magnetic control is exactly what shapes its personality: a fuller, more natural low-frequency response with bass that hits harder, plus mids and highs that stay vivid rather than muddy. If you have used cheap earbuds where the bass is just a dull thud, the spec sheet here points to something more textured. The 24 ohm impedance and 112 dB sensitivity also tell a practical story — this is an easy load to drive, so a phone, a laptop or a handheld console should push it to a usable volume without a separate amplifier.
Build and fit matter just as much. Each earbud weighs about 32g, which is heavier than the featherweight open-ear option, but that weight comes with a rounded-tip housing designed to sit properly in your ear and physically reduce outside noise. The result is sound isolation you get for free, without any electronics. You also get an oxygen-free copper flat 2-pin detachable cable, which matters if a cable ever wears out — you replace the cable, not the whole headphone. The multifunctional button handles media and calls, though volume adjustment is not supported, so you will still reach for your phone. A 1-year warranty, three pairs of tips in S/M/L and a choice of black, white or green round out the package.
Middle Rabbit S6: Who It's For
The S6 takes the opposite philosophy. Instead of sealing your ear, it hooks over it. The housing is silicone, the shape is a hook, and the whole thing is described as roughly 7g — light enough that the brand's "floats on your ear contours" language is at least directionally fair. This is what the AirFlow open-ear approach buys you: 360° ambient awareness. Traffic alerts, gym instructions, a colleague tapping your shoulder, a passenger announcement — all of it stays audible while your audio plays alongside it. For runners, cyclists and anyone working in an open office, that is not a small feature; it is the entire reason to choose this design.
The second half of the pitch is the microphone. The S6 uses an extended boom mic that reaches toward your mouth rather than hiding inside the earpiece, and the whole product is aimed at office professionals, remote workers and people stuck on long meetings. A boom mic positioned near your mouth is a genuinely different tool from an inline mic on a cable, and for voice calls that positional advantage is the point. The 16.2mm dynamic driver is larger than the KZ's on paper, but with 98 dB sensitivity and 20 ohm impedance, the tuning emphasis is clearly on speech intelligibility and everyday listening rather than thumping bass. Controls are button-based, and noise control is listed as none — an honest spec, and worth reading literally.
Who should buy it: remote workers and office commuters on calls, runners and cyclists who refuse to be deaf to their surroundings, and anyone who finds sealed earbuds uncomfortable after an hour. Who should skip it: bass lovers, frequent flyers, and anyone who wants to block out a noisy train — with no isolation and no noise control, the S6 lets the world in on purpose.
• Best for bass and music enjoyment → H HIFIHEAR KZ EDX PRO. The 10mm dual magnetic circuit driver is tuned specifically for a powerful low end.
• Best for staying aware of your surroundings → Middle Rabbit S6. Open-ear hooks leave your canal free for traffic, announcements and conversation.
• Best for voice calls and meetings → Middle Rabbit S6. The extended boom mic is designed to sit close to your mouth.
• Best for noise isolation → H HIFIHEAR KZ EDX PRO. The sealed in-ear fit physically reduces outside sound; the S6 has no noise control at all.
• Best for all-day comfort at minimum weight → Middle Rabbit S6. Around 7g per side versus roughly 32g for the KZ.
• Best for durability and repairability → H HIFIHEAR KZ EDX PRO. The 2-pin detachable oxygen-free copper cable can be swapped instead of replacing the headphone.
• Best for plugging into anything → a tie. Both use a standard 3.5mm wired jack, so phones, laptops, tablets and consoles are all fair game.
• Best for running, cycling and gym work → Middle Rabbit S6. Awareness plus a light hook fit is the safer combination for movement outdoors.
If I were buying for myself and music was the priority, I would take the H HIFIHEAR KZ EDX PRO. The 10mm dual magnetic driver, the sealed ergonomic housing and the detachable 2-pin cable make it the more capable music tool, and the isolation is a real benefit on a commute or a flight. But I would not pretend that is the right answer for everyone. If your day is built around calls and you want your ears open while you run, ride or work, the Middle Rabbit S6 is the one I would recommend — its boom mic and open-ear design solve a problem the KZ simply does not address. Two different jobs, two different picks.
The KZ EDX PRO is the bass-forward option. Its 10mm dual magnetic circuit dynamic driver is explicitly tuned for a more natural low-frequency response and powerful bass, while the S6's open-ear design and 98 dB sensitivity point toward speech and ambient listening rather than low-end weight.
Is the Middle Rabbit S6 good for running and cycling?
Yes, that is squarely what it is built for. The roughly 7g hook design and open-ear fit keep your ear canal clear so you can still hear traffic and surroundings, which matters more than bass when you are on a road or a trail.
Both can handle calls, but they do it differently. The KZ EDX PRO uses a multifunctional button and inline media control without volume adjustment, while the S6 uses an extended boom microphone positioned for clearer voice pickup — the better choice if calls are a big part of your day.
Both terminate in a standard 3.5mm jack and both are low-impedance, high-sensitivity designs (24 ohm / 112 dB for the KZ, 20 ohm / 98 dB for the S6), so phones and laptops should drive them fine. Some newer phones without a headphone jack will need an adapter, which is not included with either. Check the current price on Amazon before deciding.
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