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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-28 · 6 min read · Independent comparison
• Monster Open Ear AC322 — biggest strength: an open-ear hook design that never plugs your ear canal, so traffic, teammates and announcements stay audible while you listen.
• Monster Open Ear AC322 — biggest trade-off: no noise cancellation at all, and the open fit means bass and isolation are limited compared with sealed in-ear buds.
• Bucephalus Earbuds — biggest strength: a touchscreen charging case that controls tracks, volume, calls and EQ without touching your phone, plus ANC and a claimed 48 hours of total playtime.
• Bucephalus Earbuds — biggest trade-off: these are in-ear buds, so they physically block your ear canal — the opposite of the awareness an open-ear design gives you.
• Pick the Monster Open Ear AC322 if you want one pair for running, cycling, gym sessions and all-day wear with nothing stuffed into your ears.
• Pick the Bucephalus Earbuds if you want noise cancellation, deeper bass and case-based controls for commuting, office work and focused listening.
The AC322 is built around one idea: keep your ears open. The hook rests over your ear instead of sealing the canal, so ambient sound comes through while audio plays. For runners, cyclists and anyone training near traffic, that's the whole point. Monster pairs the open design with an adjustable ear hook, so you can tweak the angle to fit different ear sizes — useful if you've had buds slip out mid-workout before. The housing mixes plastic and silicone, which keeps the weight down, and Monster lists the set at 0.19 kg.
Battery is the other headline. Monster rates the AC322 at 36 hours of average battery life, which is enough to get most people through several days of workouts and commutes between charges. Bluetooth 5.4 handles the wireless connection, and Monster claims fast, stable pairing with ultra-low latency — relevant if you watch video or game on the move. The IPX5 rating means sweat and rain are covered, though it's a splash and spray rating rather than something you'd submerge.
The audio side is a dynamic driver covering 20 Hz to 20,000 Hz, tuned for what Monster calls Pure Monster Sound. Controls are touch-based, and there's no headphone jack — it's wireless only. Notably, noise control is listed as None. That's not a flaw so much as the design philosophy: you're supposed to hear the world.
Bucephalus Earbuds: Who It's For
The Bucephalus Earbuds take the opposite approach and pile on features. The standout is the smart touchscreen charging case: a small LED screen on the case itself lets you skip tracks, change volume, handle calls, trigger a remote camera shutter and even locate the buds — all without pulling out your phone or opening an app. It's a genuinely different way to control earbuds, and it's the reason to look at this pair.
Sound is handled by dynamic drivers with 5 EQ modes — Bass, Rock, Pop and others — switchable right on the case. The sheet lists a 10 mm driver size, 32 ohm impedance and 98 dB sensitivity, with 60 ms of stated audio latency. That's a low-latency figure aimed at keeping audio and video in sync. Active Noise Cancellation is on board, along with ENC for call clarity, and Bucephalus says you can switch between four noise-cancelling modes from the case screen.
Battery is rated at 48 hours total with the case, and 6 hours per charge in the buds. Charge time is listed at 2 hours. The buds themselves weigh just 5.67 g, which Bucephalus frames as a "zero-pressure" fit — light enough to forget you're wearing them. Bluetooth 5.4 gives a stated 33 ft range, and the connection type is USB Type-C for charging. The set ships as three items, including ear cushions and eartips.
Buy it if you want noise cancellation, deeper bass, case-based control and long total playtime for commuting, studying or office work. Skip it if you need to stay aware of your surroundings, or if you dislike anything sitting inside your ear canal — the in-ear fit is the opposite of open-ear.
Side-by-Side: Which Should You Choose?
• Best for situational awareness → Monster Open Ear AC322. The open-ear hook keeps you tuned into traffic and surroundings; the Bucephalus buds seal you off from them.
• Best for total battery life → Bucephalus Earbuds. 48 hours with the case beats the Monster's 36-hour rating, though the Bucephalus figure depends on the case, while the Monster figure is for the headset itself.
• Best for workouts and sweaty sessions → Monster Open Ear AC322. IPX5 sweat and rain resistance plus a hook that won't fall out, versus a sealed in-ear fit that can loosen with movement.
• Best for deep bass and EQ tweaking → Bucephalus Earbuds. 5 EQ modes and a bass-forward tuning, adjustable straight from the case.
• Best for calls in loud places → Bucephalus Earbuds. ENC call reduction and ANC are designed to isolate your voice; the Monster prioritizes hearing your environment instead.
• Best for all-day comfort with nothing in your ear canal → Monster Open Ear AC322. Ultralight open design versus in-ear buds, even very light ones.
• Best for phone-free control → Bucephalus Earbuds. The touchscreen case handles tracks, volume, calls, photos and bud location without an app.
• Best for long-range, low-latency wireless on both → a tie. Both use Bluetooth 5.4; the Bucephalus sheet specifies a 33 ft range and 60 ms latency.
In my opinion, these two barely compete — they solve different problems. If your listening happens on the move and you value hearing the world around you, I'd buy the Monster Open Ear AC322 for its open design, adjustable hook and IPX5 durability. If you want to block the world out, I'd buy the Bucephalus Earbuds for ANC, the touchscreen case and the longer total playtime. Neither is universally better; the deciding question is whether you want your ears open or sealed. Check the current price on Amazon before you commit, since value depends on what each one costs when you buy.
FAQ
Yes, the data sheet lists Active Noise Cancellation plus ENC call reduction, with four noise-cancelling modes switchable on the case. The Monster Open Ear AC322 lists noise control as None by design, since open-ear listening depends on letting outside sound in.
The Bucephalus Earbuds are rated at 48 hours total with the smart case and 6 hours per charge in the buds. The Monster Open Ear AC322 is rated at 36 hours of battery life. Bucephalus wins on total, but note the Monster figure is for the headset rather than a case-assisted total.
Yes. The touchscreen case lets you change tracks, volume, calls, EQ modes and noise-cancelling settings, take remote photos and locate the buds without opening an app. The Monster relies on touch controls on the headset itself.
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