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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want deep, immersive bass from an over-ear design with hybrid noise cancelling and marathon battery life, choose FOFUN NC95; if you need a waterproof open-ear set you can wear swimming with phone-free MP3 playback, choose PSIER Bone Conduction Swimming. They are not really rivals — they solve different problems. One is built for listening indoors or on a commute; the other is built to survive the pool.
• FOFUN NC95 — biggest strength: a 40 mm planar magnetic driver paired with hybrid active noise cancelling and a 120-hour playtime claim, so it's about rich, detailed sound and long, uninterrupted sessions.
• FOFUN NC95 — biggest trade-off: it's a full over-ear headphone with a plastic/stainless-steel build weighing 0.58 kg, and it is not waterproof — I would not take it near a pool.
• PSIER Bone Conduction Swimming — biggest strength: IPX8 sealing and a built-in 32GB memory mode that holds roughly 8,000 songs, so it works entirely without a phone, even underwater.
• PSIER Bone Conduction Swimming — biggest trade-off: battery life is 8 hours with a 2-hour charge, and the open-ear fit means it won't isolate you from noise the way an ANC headphone does.
• Who each pick is for: pick FOFUN NC95 if bass depth, noise cancelling and battery life matter most to you; pick PSIER if you swim, run or train and want your ears open to the world.
The FOFUN NC95 leans hard into the "listen properly" side of the market. The headline spec is the driver: a 40 mm planar magnetic unit with a 20Hz–20kHz frequency range, 32 ohm impedance and 105 dB sensitivity. Planar magnetic drivers are usually associated with tighter, more controlled low-end than a typical dynamic driver, and the 20Hz floor is where the sub-bass lives. If your reason for shopping is "I want headphones with deep bass," that combination is the most interesting thing on this spec sheet.
Around that driver sits a genuinely practical feature set. Hybrid noise cancellation handles constant low-frequency noise, and a transparency mode lets you keep your ears open for conversation or traffic without pulling the headphones off. There are four microphones for call clarity. Bluetooth 6.0 with a 15-meter range is generous — you can leave a phone on a desk and move around a room. There's also a 3.5 mm jack, which matters more than people think: on a long flight you can plug into the seatback screen instead of burning battery.
The battery claim is 120 hours of playtime in the product naming, with an average battery life figure of 65 hours listed in the details. Even the more conservative number is measured in days, not hours, for most people's commute. Charging is over USB-C, and the box includes a PU carry bag.
Who should buy it: commuters, frequent flyers, students and anyone working in a noisy shared space who wants deep low-end and doesn't want to think about charging. The knob-style button control plus app control covers most tastes — some people love a physical dial, some want everything in an app.
PSIER Bone Conduction Swimming: Who It's For
The PSIER X34-C is a specialist, and it's worth being clear about that. It's an open-ear design, so nothing goes inside your ear canal. Instead it uses a hybrid driver setup — bone conduction plus air conduction working together. PSIER's own claim is that this dual-driver arrangement delivers 30% more bass than a standard single-driver bone conduction headphone. That claim is worth reading carefully, because it's a comparison against other bone conduction designs, not against an over-ear headphone. Open-ear bass is inherently a different experience: you feel the low end as much as you hear it, and there's no seal to trap it.
The reason to buy this set is water. It carries an IPX8 rating, meaning it can be submerged to about two meters for one hour. That opens up swimming, and the 32GB of built-in memory is the enabler — you load up to roughly 8,000 songs and switch to MP3 mode so you don't need a phone or a Bluetooth connection at all. PSIER is explicit that Bluetooth cannot connect underwater, so MP3 mode isn't a bonus feature; it's the whole workflow for pool use.
The fit is designed around that. A liquid silicone coating keeps it light and stable, and the open-ear shape is meant to sit alongside swim caps, goggles, sunglasses and bike helmets without fighting them. Battery is 8 hours with a 2-hour magnetic charge. Controls are touch-based, and there's a companion app with AI-driven sound personalization so you can tune the profile to your own taste.
Who should buy it: swimmers, triathletes, runners who want to leave the phone at home, and anyone who needs to stay aware of traffic or training partners while listening.
Who should skip it: anyone whose priority is bass depth or noise isolation. If you're comparing this to the FOFUN purely on low-end response, you're comparing a sealed planar magnetic over-ear to an open bone conduction set — the FOFUN wins that contest by design, and no amount of driver engineering changes the physics.
• Best for deep bass and detailed low-end → FOFUN NC95. A 40 mm planar magnetic driver with a 20Hz response floor is the stronger foundation for bass.
• Best for swimming and water use → PSIER Bone Conduction Swimming. IPX8, submersible to two meters for an hour, with MP3 mode for underwater playback.
• Best for battery life → FOFUN NC95. 120 hours claimed, 65 hours listed as average life, versus 8 hours on the PSIER.
• Best for phone-free listening → PSIER Bone Conduction Swimming. 32GB of onboard storage for roughly 8,000 songs, no connection required.
• Best for flights, offices and commuting → FOFUN NC95. Hybrid noise cancelling, transparency mode and a 3.5 mm jack for in-flight entertainment.
• Best for running and cycling → PSIER Bone Conduction Swimming. Open-ear awareness plus a fit that plays nicely with helmets and sunglasses.
• Best for wired flexibility → FOFUN NC95. It's the only one of the two with a 3.5 mm jack; the PSIER is wireless-only.
• Best for sound personalization → PSIER Bone Conduction Swimming. The Boean app tailors audio profiles to your preferences, while the FOFUN offers app control over its settings.
If I had to pick one, I'd buy the FOFUN NC95 — but only because my listening is mostly commutes, flights and desk work, and that's exactly what it's built for. The planar magnetic driver, hybrid ANC and the sheer battery headroom are the right answer to "what headphones have deep bass" for most people reading this.
That said, if you swim, the PSIER isn't a compromise — it's the only one of the two that can do the job at all. An IPX8 over-ear headphone doesn't exist in this comparison, and a bone conduction set with no ANC won't satisfy a bass-first listener. Buy the FOFUN for the low end and the quiet, the PSIER for the water. Check the current price on Amazon before you commit, since both sit in very different budget brackets.
FAQ
what headphones have deep bass
In this comparison, the FOFUN NC95 is the bass-oriented pick. Its 40 mm planar magnetic driver covers a 20Hz–20kHz range, and 20Hz is the bottom of the audible sub-bass region. The PSIER's hybrid bone-and-air driver system is tuned for enhanced bass relative to other bone conduction sets, but an open-ear design can't match a sealed over-ear for low-end weight. If deep bass is your only criterion, go with the FOFUN.
what is bass in headphones
Bass is the low-frequency part of the audio spectrum, roughly from 20Hz up to about 250Hz. In headphones it's produced by the driver moving air, and how well it does that depends on driver type, the seal around your ear and the tuning. A sealed over-ear design like the FOFUN NC95 traps that air, which is why it produces more perceived low-end than an open-ear design like the PSIER.
what are earbuds with good bass
If you specifically want earbuds rather than over-ears, the PSIER Bone Conduction Swimming is the earbud-style option here — it's an open-ear earbud with a hybrid driver that PSIER claims delivers 30% more bass than standard single-driver bone conduction headphones. Just set expectations: it's tuned for bass within the open-ear category, not against sealed headphones. For maximum bass, the FOFUN remains the stronger pick.
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