We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-05 · 6 min read · Independent comparison
If you want one pair of wireless headphones that handles noise cancellation, calls and Nintendo Switch sessions without extra gear, choose Maxell ANC Headphones; if you need to bring a dead pair of wired headphones back to life, choose SOULWIT 40mm. These are two completely different products that happen to share one number — a 40mm driver — and that number is exactly why shoppers keep landing on both pages at once.
So let's be clear about the setup. One is a finished Bluetooth headphone with active noise cancellation, a detachable boom mic and a 40mm high-fidelity driver. The other is a pair of raw 40mm replacement speaker drivers you solder into a headset you already own. If you're hunting for the best headphone for Switch, the answer is the Maxell. If you dropped your wired cans and the left cup went silent, the answer is the SOULWIT pair. Same size, opposite jobs.
• Maxell ANC Headphones — biggest strength: a complete wireless package with active noise cancellation, a detachable boom mic and a built-in mic, all running on a 40mm high-fidelity driver.
• Maxell ANC Headphones — biggest trade-off: battery life is modest at 10 hours with ANC on (15 hours with it off), and there's no headphone jack, so it's Bluetooth-only.
• SOULWIT 40mm — biggest strength: a 32Ω dynamic driver that restores clear, balanced sound to a long list of popular wired headphones instead of replacing them.
• SOULWIT 40mm — biggest trade-off: installation requires soldering, and SOULWIT states plainly that this can be challenging for beginners — no warranty is listed either.
• Pick Maxell if you want to listen, talk and travel with one finished product.
• Pick SOULWIT if you're repairing or modding an existing headset and you're comfortable with a soldering iron.
Maxell's ANC headphone is a self-contained listening tool. It connects over Bluetooth 5 with a range of about 10 meters, so you can leave your phone on the couch and walk to the kitchen without the audio dropping. Turn on active noise cancellation and it reduces roughly 20dB of outside noise — enough to take the edge off a noisy room, a bus engine or a shared office. The 40mm dynamic driver covers 20 Hz to 20,000 Hz, which is the standard full-range span, and 40mm is a genuinely useful size in a headphone: it moves enough air to give music some body without making the cups bulky.
The feature that separates it from most wireless headphones at this level is the detachable boom mic. For virtual meetings, that boom gets your voice much closer to the mic element than a built-in mic ever can, and you can pull it off when you're just listening. There's also a built-in microphone for hands-free calls when the boom isn't attached. Add touch media controls on the earcup, a two-hour charge time and a protective case in the box, and you've got a headphone built for office, school and home use.
Who should buy it: anyone who wants one wireless pair for music, calls and gaming — including Switch players who want a wireless over-ear option with a mic they can actually talk into. Who should skip it: audiophiles chasing wired fidelity, people who need all-day battery, and anyone whose devices only do analog audio, since there's no 3.5mm jack here. If you're pairing it with a Switch in docked mode, check how your console handles Bluetooth audio before you commit.
SOULWIT's 40mm driver is a repair part, not a product you listen to out of the box. It's a 32Ω dynamic driver sold as a matched pair, and the impedance figure matters: 32Ω is the common load for portable-friendly headphones, so these drivers are designed to behave like the originals they replace rather than demand a dedicated amplifier. SOULWIT describes the resulting sound as OEM-like — clear, balanced and distortion-free — which is exactly what you want from a replacement: not a "better" sound, but the sound you already had.
The compatibility list is the real selling point. SOULWIT lists QC35, QC45, QC25, QC15, QC2, QC3, AE2, OE2, Studio, Studio 2, Studio 3, Studio Pro, Solo, Solo 2, Solo 3, Solo 4, Razer Kraken 7.1, AKG K55 and Marshall Major II. That covers a huge slice of the wired headphones people actually own and still love. The earpiece shape is listed as circle and the ear placement as over-ear, so the physical format is a standard round 40mm cup driver.
The honest trade-off is the install. SOULWIT states directly that installation involves soldering and can be challenging for beginners, and asks buyers to make sure they have the tools and experience first. There's no warranty listed. So this is for tinkerers, repair-shop regulars and anyone who'd rather spend an evening with a soldering iron than retire a favorite pair of headphones. If you've never soldered, this is not a good first project.
• Best for Switch gaming with voice chat → Maxell ANC Headphones. Wireless Bluetooth audio plus a detachable boom mic covers game sound and party chat in one device.
• Best for noise cancellation → Maxell ANC Headphones. ~20dB of active noise reduction is something the SOULWIT drivers simply don't offer.
• Best for reviving old wired headphones → SOULWIT 40mm. That's the entire purpose of the product.
• Best for hands-free calling → Maxell ANC Headphones. Detachable boom mic plus a built-in mic, all wireless.
• Best for tinkerers and DIY repairs → SOULWIT 40mm. Soldering required, but the payoff is a working headset again.
• Best for plug-and-play simplicity → Maxell ANC Headphones. No tools, no soldering, no disassembly.
• Best for long listening sessions → neither, strictly speaking. Maxell tops out at 10 hours with ANC on and 15 with it off; SOULWIT depends entirely on the host headphone, since the drivers don't carry their own power.
• Best for travel → Maxell ANC Headphones. Bluetooth 5, a 10-meter range and a protective case in the box.
If you're shopping for headphones to actually use — and especially if you want a wireless over-ear setup for Switch with a mic you can talk through — I'd buy the Maxell ANC Headphones. In my opinion the combination of ~20dB active noise cancellation, a 40mm full-range driver, a detachable boom mic and Bluetooth 5 is a coherent package that works for music, meetings and gaming without a dongle or a cable. I'd only choose the SOULWIT 40mm if my goal were repairing or modding an existing wired headphone and I already knew my way around a soldering iron. Different products, different buyers, no real overlap beyond the driver size.
what is 40mm driver in headphones
A 40mm driver is the speaker element inside a headphone cup, measured across its diameter. It's the part that converts the audio signal into sound, and 40mm is a middle-of-the-road size that suits over-ear headphones like the Maxell model here.
what are 40mm drivers in headphones
They're dynamic drivers — a diaphragm, voice coil and magnet — sized at 40mm across. The Maxell ANC Headphones use a 40mm high-fidelity dynamic driver covering 20 Hz to 20,000 Hz, while the SOULWIT part is a 40mm dynamic driver rated at 32Ω for replacing worn drivers.
which driver is best for headphones
There's no single best size; what matters is the match between the driver and the headphone's design. A 40mm driver is a solid all-rounder for over-ear models, and in the SOULWIT case the 32Ω impedance is chosen so the replacement behaves like the original in portable headphones.
is 40mm driver good for headphones
Yes — 40mm is a common, capable size for over-ear headphones and can deliver full-range sound when paired with a decent enclosure. The Maxell ANC Headphones rely on exactly that: a 40mm driver handling music, calls and gaming audio in one wireless package.
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