We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-18 · 8 min read · Independent comparison
If you want a do-everything over-ear headphone with class-leading 60-hour battery life and true active noise cancellation, choose RORSOU C6; if you need lightweight clip-on open-ear buds that keep you aware of traffic, gym noise and conversations while you listen, choose Monster Earbuds Open AC601. That one sentence is the whole article compressed. Everything below is the reasoning, spec by spec, so you can sanity-check it against your own use.
• RORSOU C6 — biggest strength: Active Noise Cancellation plus a 60-hour battery, a wired 3.5 mm fallback and Bluetooth 5.4, all in an over-ear package weighing about 0.23 kg.
• RORSOU C6 — biggest trade-off: It's a full over-ear headphone, so it's more to carry, more to store, and it seals you off from the world instead of letting sound in.
• Monster Earbuds Open AC601 — biggest strength: The open-ear clip-on format. Nothing plugs your ear canal, so you hear your surroundings while music, calls and podcasts keep playing.
• Monster Earbuds Open AC601 — biggest trade-off: Open-ear design means you don't get Active Noise Cancellation, and the battery story is different: 32 hours total with the charging case rather than 60 hours on a single headphone charge.
• Pick RORSOU C6 if you want to disappear into your own audio — flights, open-plan offices, study sessions, long trips where you don't want to think about charging.
• Pick Monster Earbuds Open AC601 if you want audio that coexists with the real world — running, cycling, gym floors, warehouse shifts, walking the dog.
The C6 is built around one clear idea: shut the world out and keep playing. Inside are 40 mm dynamic drivers with a 20 Hz–20 kHz frequency range and 32 ohm impedance — a sensible, easy-to-drive spec that any phone, tablet or laptop can push without help. The headline feature is Active Noise Cancellation, which is the part of this design that actually changes how you use it. On a plane, in a noisy café or across a shared office, ANC is the difference between turning the volume up and simply hearing less. Because the earcups are over-ear and oval, they sit around the ear rather than pressing on it, which is also why the fit equation works better for longer sessions.
Around that core, RORSOU has added practical flexibility. Bluetooth 5.4 gives you a modern wireless link with roughly 10 meters of range, and there's a 3.5 mm jack as a wired fallback — genuinely useful if a battery dies mid-flight, if you're plugging into a seat-back screen or a desktop PC, or if you're on a device that simply doesn't do wireless. Controls are physical push buttons rather than touch, which I personally prefer on cold days or in gloves, because you can feel the click instead of guessing. The 60-hour average battery life with a 2-hour charge time is the other big number: for most people that's a charge every week or two, not every day. It folds, ships with a protective case and cable, and it's finished in Silver with an ABS/metal/PC build that reads as sturdy rather than precious. There's a 1-year manufacturer warranty.
Who should buy it: commuters, frequent flyers, students, remote workers and anyone whose listening happens in one fixed-ish place where blocking noise matters more than staying aware. Who should skip it: runners, cyclists and anyone who needs to hear cars, colleagues or announcements — ANC plus a sealed over-ear fit is the opposite of what you want there. Also skip it if you want buds that vanish into a pocket.
The AC601 goes the other way entirely. It's an open-ear clip-on — the bud hooks over the ear and fires sound toward your canal without blocking it. That single design decision drives everything else. You keep ambient awareness: the bike lane, the treadmill next to you, the kid calling your name, the announcement over the tannoy. For a lot of people, that's not a compromise, it's the reason to buy. It's also why this product leans on Environmental Noise Cancellation for calls rather than Active Noise Cancellation for listening. ENC cleans up your voice on the microphone side so callers hear you, not the traffic behind you. It doesn't silence the world for you — that's not what open-ear is for.
Sound comes from 13 mm PVK composite sound film drivers, which is a larger-than-typical driver for this category and is the sort of thing that tends to show up as fuller bass and clearer highs in an open design, where you're not relying on a seal to generate low end. Bluetooth 5.4 is on board here too, with the low-latency, audio-video-synced connection you want for gaming and calls. The IPX5 rating means rain and sweat are fine — not swimming, but a downpour on a run or a heavy gym session won't kill them. Battery is 32 hours total including the charging case, so plan around topping the case up; this isn't a once-a-week charge like the C6, it's a put-them-back-in-the-case habit. Controls are touch-based, the clip-on fit is designed to stay put through vigorous movement, and the finish is Purple.
Who should buy it: runners, cyclists, gym-goers, delivery riders, warehouse and workshop staff, people who take a lot of calls on the move, and anyone who finds in-ear tips uncomfortable or prone to falling out. Who should skip it: anyone who needs real noise cancellation, or who wants maximum uninterrupted battery from a single charge. If your priority is silence, this is the wrong tool.
• Best for blocking out noise → RORSOU C6. It has Active Noise Cancellation; the AC601 has Environmental Noise Cancellation for calls only, not listening.
• Best for hearing your surroundings → Monster Earbuds Open AC601. Open-ear clip-on design is the entire point here.
• Best for battery per charge → RORSOU C6. 60 hours average life versus 32 hours total including the AC601's charging case.
• Best for running, cycling and the gym → Monster Earbuds Open AC601. IPX5 sweat-and-rain resistance, a secure clip-on fit, and no sealed canal to trap moisture.
• Best for long-haul travel and study → RORSOU C6. ANC, over-ear oval cups, folding design, protective case.
• Best for calls in noisy places → Monster Earbuds Open AC601. ENC targets your voice on the mic, which is exactly the problem it's meant to solve.
• Best for wired flexibility → RORSOU C6. A 3.5 mm jack plus Bluetooth 5.4 means it works with almost anything, including non-wireless gear.
• Best for comfort if you hate in-ear tips → Monster Earbuds Open AC601. Nothing goes inside your ear canal.
• Best for touch vs. button controls → depends on taste. The AC601 uses touch; the C6 uses push buttons. I lean toward buttons for reliability, touch for convenience.
If I had to buy one for myself, I'd take the RORSOU C6. My reasoning is purely about how I listen: mostly at a desk, on planes and in noisy rooms, where Active Noise Cancellation and a 60-hour battery are worth more to me than staying aware of my surroundings. The wired 3.5 mm option and physical buttons seal it for me — fewer things to go wrong, more devices it works with. That said, if your audio happens while you're moving through the world — running, riding, lifting, taking calls on a busy street — I'd point you straight at the Monster Earbuds Open AC601, because its open-ear clip-on design solves a problem the C6 doesn't even try to solve. Different jobs, different tools. Check the current price on Amazon for whichever one matches your routine.
Yes, by design. The C6 has Active Noise Cancellation, which reduces what you hear around you. The AC601 has Environmental Noise Cancellation, which is about making your voice clearer on calls — it doesn't block outside sound for you. If quiet is the goal, the C6 is the one.
They're rated IPX5, which covers sweat and rain splashes, so a run in bad weather is within what the spec supports. They're not built for swimming or full submersion. The clip-on fit is designed to stay put during vigorous activity.
The RORSOU C6 lists 60 hours of average battery life per charge, with a 2-hour charge time. The Monster AC601 lists 32 hours total, and that figure includes the charging case, so the buds themselves hold less than that between case top-ups.
Yes. The C6 has both Bluetooth 5.4 and a 3.5 mm jack, so you can use it wirelessly or plug in — handy for plane seat-back screens, desktops and older devices. The AC601 is wireless only.
It depends on what bothers you. The C6 is over-ear with oval cups, which spreads pressure around the ear instead of inside it. The AC601 never enters your ear canal at all, which suits people who dislike ear tips. Neither spec sheet promises a universal winner — match it to what usually annoys you.
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