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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-01 · 6 min read · Independent comparison
• Wentronic Y04 — biggest strength: Over-ear active noise cancelling with multiple microphones and up to 48 hours of playtime on a single charge, which is a genuinely long stretch between charges.
• Wentronic Y04 — biggest trade-off: It's the bulkier option at 0.6 kg, and it relies on physical button controls rather than touch.
• BLXSounds A9 — biggest strength: A hybrid package — Bluetooth 5.3 true wireless earbuds with a charging case plus two USB-C wired in-ear pairs, so you get three ways to listen in one box.
• BLXSounds A9 — biggest trade-off: Earbud battery life is much shorter per charge (roughly 6–8 hours, extended to about 40 hours with the case), and the noise cancelling is aimed at calls rather than immersive music isolation.
• Who each pick is for: Wentronic Y04 suits travelers, commuters and remote workers who want one comfortable over-ear pair; BLXSounds A9 suits people who want earbuds for the gym plus a wired backup for laptops and older devices.
The Wentronic Y04 is built around one clear idea: block out the world and stay comfortable while you do it. It uses active noise cancelling with multiple microphones, which is the kind of setup meant to take the edge off engine drone, subway rumble and street noise. Pair that with over-ear cups and the picture is obvious — this is a headphone for the commute, the flight, and the long work block where you need the outside to fade.
Comfort looks like the other half of the story. The ear cushions are memory foam wrapped in protein leather, and the whole thing folds down for packing into a backpack or suitcase. Battery life is rated at up to 48 hours of continuous playtime, which is the standout number here. If you charge on Sunday, you may not think about the cable again for most of the week. Sound comes from large dynamic drivers covering a 20 Hz to 20,000 Hz range, tuned to keep bass strong without burying vocals — a sensible everyday balance rather than a specialist signature.
BLXSounds A9: Who It's For
The BLXSounds A9 plays a different game entirely. Instead of one pair of headphones, it's a small ecosystem: A9 Pro true wireless earbuds with a charging case, plus a two-pack of USB-C wired in-ear headphones in the same box. The wireless side runs Bluetooth 5.3 with one-step automatic pairing, which is the current mainstream standard and should connect cleanly to most Bluetooth devices you own.
The spec sheet tells you exactly what each part is for. The earbuds offer roughly 6–8 hours per charge and about 40 hours total with the case, with an LED display showing the case's remaining power — a small feature that removes the guessing game before you leave the house. There's a microphone with ENC noise cancelling, which is about making your voice clearer on calls rather than sealing you off from a noisy room, plus smart touch controls for music and calls. The wired USB-C pairs are the practical insurance policy: lightweight, ergonomically shaped for smaller ears, with inline remote and mic so you can take calls without touching your phone.
Who should buy it: people who split their listening between a phone and a laptop, anyone who wants a wired option for devices that don't do Bluetooth well, and listeners with smaller ears who find big over-ears heavy. The wired pairs are also handy for gaming and music streaming at a desk. Who should skip it: travelers who want serious noise isolation on a plane, and anyone who dislikes in-ear tips entirely — every part of this kit goes inside your ear. If you want one premium-feeling over-ear headphone, this isn't that.
Side-by-Side: Which Should You Choose?
• Best for noise cancelling on a plane or subway → Wentronic Y04. Its multi-microphone ANC is designed for blocking background noise, while the A9's ENC is focused on call clarity.
• Best for portability → BLXSounds A9. Earbuds plus a case disappear into a pocket; the Y04 is a 0.6 kg over-ear that folds but still takes up real space.
• Best for wired flexibility → BLXSounds A9. It includes two USB-C wired pairs, while the Y04 offers a single 3.5 mm jack.
• Best for all-day comfort over long sessions → Wentronic Y04. Memory foam and protein leather over-ear cushions spread pressure across your head rather than inside your ear canal.
• Best for small ears → BLXSounds A9. Its wired pairs are specifically shaped for smaller ears and long, pain-free wear.
• Best for calls in noisy places → BLXSounds A9. ENC on the mic targets your voice quality during conversations.
• Best if you hate charging → Wentronic Y04. Fewer charging cycles, fewer cables, less thinking.
In my opinion, I'd buy the Wentronic Y04 if I were choosing for myself. Here's my reasoning: active noise cancelling, over-ear comfort and up to 48 hours of playtime cover the three things that actually annoy me about headphones — noise, pressure and charging. The foldable frame and 3.5 mm jack make it flexible enough for travel and desk work. That said, if your life revolves around the gym, a laptop bag and switching between devices, the BLXSounds A9's three-pairs-in-one approach is the smarter buy. Match the form factor to your routine first; everything else follows.
They're designed for different kinds of noise. The Y04 uses active noise cancelling with multiple microphones to reduce background sound around you. The A9's ENC is aimed at making your voice clearer on calls. For blocking a plane cabin, the over-ear Y04 is the more suitable design.
Wentronic Y04 is rated for up to 48 hours of continuous playtime on one charge. The BLXSounds A9 gives roughly 6–8 hours per earbud charge and about 40 hours total with the charging case. The case also has an LED display so you can see remaining power.
The BLXSounds A9's wired USB-C pairs are ergonomically shaped for smaller ears and built for extended, pain-free wear. The Wentronic Y04 solves comfort differently — memory foam cushions wrapped in protein leather, which suits people who dislike anything sitting inside the ear canal.
Yes, but differently. The Wentronic Y04 has a 3.5 mm jack for wired listening. The BLXSounds A9 includes two USB-C wired in-ear headphones, which work with USB-C laptops and phones. If your device only has a 3.5 mm port, the Y04 is the simpler fit.
Yes — these are two different product categories, so the value question depends on what you're getting in the box. Check the current price on Amazon for both before you commit.
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