We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-23 · 7 min read · Independent comparison
If you want a truly wireless, sweat-proof everyday earbud with a battery case and a display you can read at a glance, choose Jxrev Earbuds; if you need a wired, open-back on-ear headphone built for serious listening at a desk, choose Moondrop Old Fashioned 40mm.
• Jxrev Earbuds — biggest strength: Bluetooth 5.4 with auto-reconnect, up to 40 hours of total playback with the case, and an IP7 waterproof nano-coating that shrugs off sweat and drizzle.
• Jxrev Earbuds — biggest trade-off: It's a semi-in-ear, stick-style bud with a plastic build and no wired option, so it can't match an open-back headphone for pure soundstage, and it depends on charging.
• Moondrop Old Fashioned 40mm — biggest strength: A 40mm dynamic driver with a three-layer rigid-flex composite diaphragm and open-back tuning, plus a detachable 0.78mm 2-pin cable and a modular headband.
• Moondrop Old Fashioned 40mm — biggest trade-off: It's wired only, has no noise cancelling of any kind, and its open-back design leaks sound both ways — it's a stay-put headphone, not a commuter one.
• Who Jxrev is for: Runners, gym-goers, commuters and anyone who wants one pair for calls, music and workouts with nothing to plug in.
• Who Moondrop is for: Listeners who sit down to listen, work from a desk, or want a headphone they can re-cable and repair rather than replace.
The Jxrev Earbuds are built around convenience first. Bluetooth 5.4 handles the connection, and the pairing routine is genuinely simple: open the lid of the charging case and they auto-reconnect to a phone, tablet, laptop or TV. Each bud weighs about 3 grams, so the semi-in-ear shape rests against the ear rather than plugging the canal — the sort of fit people reach for when rubber tips start to ache after an hour.
Battery is the headline number here. You get up to 8 hours on a single charge, and the case adds roughly four more recharges for about 40 hours total, with a one-hour charge time for the buds and the case. The LED display on the case shows the remaining power for each bud and the case separately, which is a small thing that saves a lot of guessing before a workout. Around the audio side, 13mm dynamic drivers push the bass and high notes, while four ENC microphones cut environmental noise by up to 35dB on calls — useful when you're taking a meeting on a noisy street.
The other half of the pitch is durability and control. IP7 waterproofing is applied as an internal nano-coating on the components, so sweat during a run or light rain on a walk isn't a problem. Touch controls on each bud handle volume, playback, calls and voice assistant without pulling out your phone, and the buds work independently, so you can hand one to someone else to share a video. There's a 1-year warranty and a standard package with the case, cable, manual and both buds.
Buy it if you want one pair for the gym, the commute and calls, and you'd rather not deal with a cable.
Skip it if your priority is critical listening, open soundstage or a repairable, upgradeable design — that's not what this product is.
The Moondrop Old Fashioned 40mm goes the opposite direction entirely. This is a wired on-ear headphone with an open-back design, a circular silver earcup, and a retro silhouette that Moondrop leans into deliberately. The core is a 40mm large dynamic driver paired with a high-damping-coefficient, three-layer rigid-flex composite diaphragm, tuned for an open-back soundstage rather than isolation. The frequency response runs 20Hz–32kHz, with an effective range of 20Hz–20kHz, 32 ohm impedance, 109dB/Vrms sensitivity and THD of 0.2% or lower at 94dB and 1kHz — all numbers that point to something easy to drive from a phone or a small dongle, not a headphone that demands a desktop amplifier.
Comfort and fit are clearly thought through. The headband is telescopic, the hinges swivel on multiple axes, and the whole thing is designed to adapt to different head shapes rather than clamp down in one fixed position. The earcups and headband are also detachable — a modular design that matters if you ever want to replace a part instead of the whole headphone.
Then there's the cable. The Old Fashioned uses a 0.78mm 2-pin interchangeable connection, and the package includes a 3.5mm stereo plug, so you can swap cables for a different termination or a longer run without touching the drivers. That's the kind of feature you normally associate with in-ear monitors, and it's unusual and welcome on an on-ear headphone. The trade-off is honest: there is no noise cancelling at all, and an open-back headphone both lets sound in and lets it out. In a quiet room it sounds spacious; on a bus it's the wrong tool entirely.
Buy it if you listen at a desk, in a quiet room, or you want a headphone you can re-cable and disassemble over time.
Skip it if you need wireless freedom, noise isolation, or something you can wear while running or in the rain.
• Best for workouts and sweaty sessions → Jxrev Earbuds. IP7 waterproofing and a 3g-per-bud fit are made for movement; the Moondrop has no water rating at all.
• Best for commuting and noisy environments → Jxrev Earbuds. Four ENC mics and active noise cancellation in the buds versus zero noise control on the Moondrop.
• Best for calls and meetings → Jxrev Earbuds. ENC noise reduction up to 35dB and touch controls on each bud make it the practical pick for voice.
• Best for pure listening at a desk → Moondrop Old Fashioned 40mm. The 40mm driver and open-back tuning are aimed at soundstage and tone, not isolation.
• Best for battery-free, always-ready listening → Moondrop Old Fashioned 40mm. It's wired, so there's nothing to charge and nothing to run flat mid-album.
• Best for longevity and repairability → Moondrop Old Fashioned 40mm. Detachable earcups and headband plus a 0.78mm 2-pin interchangeable cable mean parts can be swapped.
• Best for sharing audio with someone nearby → Jxrev Earbuds. Each bud works alone, so one can go to a friend while the other stays with you.
• Best for long wear without ear-canal pressure → split decision. Jxrev's semi-in-ear shape avoids rubber tips; Moondrop's telescopic band and multi-axis hinges spread the load over the head instead.
If I had to pick one, I'd buy the Jxrev Earbuds — not because they sound better, but because they fit more of my actual day. Wireless with 40 hours of case-backed playback, IP7 protection and readable battery indicators covers workouts, walks, calls and travel without a second thought. The Moondrop Old Fashioned 40mm is the better headphone for sitting still and listening properly, and its detachable cable and modular build make it a smarter long-term object. But it's a specialist, and it needs a quiet room to earn its keep. In my opinion, most people shopping between these two want the earbuds; pick the Moondrop only if wired, open-back listening is exactly the point.
The Jxrev Earbuds, clearly. They're wireless, weigh about 3g per bud, and carry IP7 waterproofing that protects against sweat and light rain. The Moondrop is a wired on-ear headphone with no water rating, so it isn't built for exercise.
No. Their noise control field is listed as none, and the open-back design deliberately lets outside sound in while leaking your music out. If you need quiet on a plane or train, the Jxrev Earbuds with active noise cancellation and ENC mics are the right choice.
Yes. It uses a 0.78mm 2-pin interchangeable connection and ships with a 3.5mm stereo plug, so you can swap cables. The earcups and headband are also detachable, which makes the headphone more serviceable over time than a sealed wireless design.
Both are sold on Amazon, and prices move around, so check the current price on Amazon before deciding — that comparison matters more than any spec here. If price is close, buy based on use: Jxrev for wireless, waterproof and portable, Moondrop for wired, open-back listening.
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