How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want to repair a pair of premium headphones you already own, choose SOULWIT 40mm; if you need a complete wireless daily-driver with a huge battery, choose URBAN SWING URBANSWING B1. That's the whole decision in one line. One product is a pair of replacement drivers you solder into an existing headset. The other is a finished pair of Bluetooth headphones you unbox and wear. They only look like competitors because a search box put them side by side.
• SOULWIT 40mm — biggest strength: 32Ω dynamic drivers that restore headphones you already love, across a huge compatibility list (QC35/QC45/QC25/QC15/QC2/QC3/AE2/OE2, Studio/2/3/Pro, Solo/2/3/4, Kraken 7.1, K55, Major2 and more).
• SOULWIT 40mm — biggest trade-off: installation requires soldering. If you don't own an iron and have steady hands, this part is not for you, and SOULWIT says so plainly.
• URBAN SWING URBANSWING B1 — biggest strength: up to 120 hours of playtime per charge, four EQ modes, and a 40mm dynamic driver in a foldable over-ear frame.
• URBAN SWING URBANSWING B1 — biggest trade-off: no active noise cancellation, no water-resistance rating, and URBAN SWING itself says it isn't aimed at audiophiles chasing studio-monitor accuracy.
• Who SOULWIT 40mm is for: tinkerers and owners of broken-but-beloved headphones who'd rather fix than replace.
• Who URBAN SWING URBANSWING B1 is for: commuters, students, flyers and remote workers who want one pair that just works out of the box.
SOULWIT 40mm is a repair part, not a headphone. You get one pair of 32Ω dynamic drivers in a circular over-ear form factor, made to drop into a long list of well-known models. The pitch is simple: a dead driver turns a good headset into e-waste, and this part gives it a second life instead. SOULWIT describes the sound as OEM-like — clear, balanced, distortion-free, in the same ballpark as the originals.
So who should buy it? Someone with a specific headset on that compatibility list that still fits well and still feels premium, but has gone silent or crackly on one side. Also the person who simply likes keeping things running. Who should skip it? Anyone without a soldering iron, anyone whose headset is falling apart everywhere (new pads, broken hinges, dead battery — at that point you're rebuilding, not repairing), and anyone who wants to listen today. Note too that the warranty description is listed as "No," so the risk sits with your own hands. In my opinion, SOULWIT 40mm is the right call only when the rest of your headphone is genuinely worth saving.
URBAN SWING URBANSWING B1: Who It's For
URBAN SWING URBANSWING B1 is the opposite kind of purchase: a finished, wireless, over-ear headphone in black, weighing 7.36 ounces, with oval earcups and a foldable frame. The headline number is battery life — up to 120 hours per charge. For commuters, frequent flyers and remote workers, that's the whole argument. You charge it rarely and stop thinking about it.
Sound-wise you get a 40mm dynamic driver, 32Ω impedance, 20Hz frequency response and 108dB sensitivity, plus four EQ modes you switch between on the fly: Default, Balanced, Bass Boost and Vocal. That's a genuinely useful feature set for mixed listening — Bass Boost for the gym or a movie, Vocal for podcasts and lectures, Balanced for general music. Connectivity is Bluetooth with a 33 ft (10 m) range, and there's a 3.5mm jack as well, so wired listening is still on the table. A built-in mic and button controls handle calls, volume and voice-assistant triggers. The cushions are memory foam with faux leather, the closed-back design gives passive noise isolation, and the package includes a velvet pouch plus a carrying case measuring 11.81 × 7.87 inches.
URBAN SWING is refreshingly specific about who this is not for: anyone under 16, anyone who needs active noise cancellation, audiophiles wanting studio-monitor accuracy, and high-intensity athletes needing an IPX water rating. Take those four exclusions seriously and you'll be happy. Ignore them and you'll be disappointed. For a student, a train commuter, or someone taking calls all day, it fits well. The 1-year manufacturer warranty is a point in its favor for a wireless product, where the battery is the part most likely to age.
• Best for reviving a broken premium headset → SOULWIT 40mm. The compatibility list is the entire value proposition.
• Best for battery life → URBAN SWING URBANSWING B1. Up to 120 hours per charge is the standout spec here.
• Best for hands-on repairers → SOULWIT 40mm. If soldering is a skill you already have, this is a satisfying fix.
• Best for plug-and-play buyers → URBAN SWING URBANSWING B1. Bluetooth, mic, button controls, pouch — nothing else to buy.
• Best for sound tweaking on the fly → URBAN SWING URBANSWING B1. Four EQ modes versus a fixed OEM-style tuning.
• Best for quiet focus in loud places → neither, strictly. URBAN SWING offers passive isolation only and no ANC; SOULWIT's result depends entirely on the headset you install it into.
• Best for a gift → URBAN SWING URBANSWING B1. A finished product with a warranty and a case beats a soldering project for most people.
• Best for someone with no tools and no patience → URBAN SWING URBANSWING B1. SOULWIT requires equipment and experience.
• Best for long-term ownership of a specific favorite model → SOULWIT 40mm. Keeping one headset alive for years can beat replacing it.
For most readers, I'd buy the URBAN SWING URBANSWING B1. It arrives ready to use, runs for up to 120 hours per charge, gives you four EQ modes, a mic, a 3.5mm option and a one-year manufacturer warranty. I'd only choose the SOULWIT 40mm if I already owned a compatible headset I loved and could solder confidently, because that's the one scenario where it wins outright. Different problems, different answers — but if you're starting from zero, the B1 is the safer, more useful purchase in my opinion.
FAQ
No. URBAN SWING lists ANC as something this model is not recommended for. It relies on passive noise isolation from the closed-back design and memory foam cushions.
That depends on what you already own. If you have a compatible headset that's failed, SOULWIT 40mm turns a repair into a working headphone again. If you have nothing to repair, the B1 gives you a full wireless setup with a case, pouch and warranty. Check the current price on Amazon for both before deciding.
Yes. It has a 3.5mm jack alongside Bluetooth, so you can go corded when you want to. SOULWIT 40mm, by contrast, isn't a listening device on its own at all.
Up to 120 hours of playtime per charge, per URBAN SWING. Real-world results vary with volume and EQ mode, but that's the figure the design targets.
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