We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-02 · 7 min read · Independent comparison
If you want to add high-resolution LDAC streaming to a home stereo or powered speakers you already own, choose 1Mii B06Ultra; if you need open-ear earbuds for running, commuting, and all-day wear with total water protection, choose Anker Soundcore AeroFit. These two products only look like rivals because both sit in the Bluetooth audio aisle. In practice they solve completely different problems, and the "LDAC headphones" search that pulled you here deserves a straight answer about which one actually gives you the codec.
• 1Mii B06Ultra — biggest strength: true LDAC Hi-Res wireless streaming up to 24bit/96kHz and 990kbps, plus an ES9018K2M audiophile DAC, feeding the stereo system you already love.
• 1Mii B06Ultra — biggest trade-off: it is a corded desktop-style receiver, not something you wear. No battery freedom, no portability, and it needs a power outlet plus a cable run to your amp or speakers.
• Anker Soundcore AeroFit — biggest strength: open-ear comfort with awareness of your surroundings, 42H playtime, IPX7 waterproofing with SweatGuard, and 4 mics with AI noise reduction for calls.
• Anker Soundcore AeroFit — biggest trade-off: no LDAC, no wired jack, and no active noise cancellation. It is a listening-while-aware product, not a hi-res codec machine.
• Who each pick is for: 1Mii B06Ultra for the home listener chasing LDAC and a better-sounding living room; AeroFit for the runner, cyclist, or commuter who wants earbuds that stay put and let the world in.
The B06Ultra is a Bluetooth receiver, which means it takes the wireless signal from your phone or tablet and hands it to hardware you already own: a stereo receiver, an AV receiver, powered speakers, or an amplifier. That single idea is the whole product. You are not buying new speakers. You are buying a better wireless front door for the speakers sitting in your living room right now.
The headline feature is LDAC. 1Mii rates the B06Ultra for up to 24bit/96kHz transmission at a 990kbps bitrate, and it also handles aptX HD, aptX Low Latency, AAC, and SBC so older phones and tablets still connect without drama. The ES9018K2M DAC chip is the second half of that story — it does the decoding inside the box, which is why this reads as an audiophile-oriented adapter rather than a cheap dongle.
Who should buy it: anyone with a good passive or powered speaker setup who wants LDAC-grade streaming without replacing the system, and anyone who wants one box that handles optical and analog inputs alike. Who should skip it: you want earbuds for the gym, you need noise cancellation, or you refuse to run a power cable and an audio cable to a shelf. This is a stationary product and it behaves like one.
Anker Soundcore AeroFit: Who It's For
The AeroFit is the opposite philosophy. It is an open-ear earbud with an ergonomic ear hook, built around a lightweight, compact design that sits outside your ear canal instead of plugging it. That one design choice drives everything else: you stay aware of transit announcements, traffic, and the people around you, and your ears stay breathable through long sessions. Soundcore says the fit gradually conforms to your ears, so comfort tends to improve with wear rather than degrade.
Sound comes from dynamic drivers with composite diaphragms and titanium-coated domes, tuned for balanced output — symphonic mids, a wide stage, clear highs — rather than a bass-heavy thump. There is no active noise cancellation here, and that is intentional: this is a "hear the world" product. For calls, four microphones pair with an AI noise reduction algorithm to clean up your voice on the other end of the line.
The practical numbers are strong for the category. Anker rates 42H of playtime with a 1-hour charge time, Bluetooth 5.3, and IPX7 waterproofing backed by SweatGuard nano-coating and a sealed chamber design. Touch controls handle playback, and the Soundcore app adds EQ and control customization. The build is ABS, polycarbonate, and TPE, and the whole package weighs about 5.12 ounces.
Who should buy it: runners, cyclists, gym-goers, and commuters who need to hear traffic; anyone who finds in-ear tips uncomfortable or prone to falling out; people who take a lot of calls outdoors. Who should skip it: you want LDAC hi-res transmission, you want isolation from a noisy train or plane, or you want a wired option. There is no headphone jack on the AeroFit.
Side-by-Side: Which Should You Choose?
• Best for upgrading an existing stereo → 1Mii B06Ultra. Optical, coaxial, RCA, and 3.5mm outputs mean it plugs into gear you already own.
• Best for battery life → Anker Soundcore AeroFit. 42H rated playtime on a 1-hour charge versus a corded receiver that needs wall power.
• Best for workouts and rain → Anker Soundcore AeroFit. IPX7 with SweatGuard is a genuine advantage over a shelf-bound receiver.
• Best for staying aware outdoors → Anker Soundcore AeroFit. Open-ear design keeps traffic and announcements audible.
• Best for long-range freedom at home → 1Mii B06Ultra. Bluetooth 5.3, dual antennas, and Class 1 are rated for about 100ft open space and 50ft indoors.
• Best for calls → Anker Soundcore AeroFit. Four mics plus AI noise reduction are built specifically for voice.
• Best for a quiet, focused listen → 1Mii B06Ultra. The ES9018K2M DAC and 3D surround mode are aimed at sitting down and listening properly, not multitasking.
If your goal is literally what you searched for — LDAC headphones or LDAC-grade wireless audio — I would buy the 1Mii B06Ultra. In my opinion it is the only one of these two that actually delivers LDAC, and it does so with a real DAC chip and enough inputs to revive almost any stereo you already own. The AeroFit is a genuinely good open-ear earbud, but it is not a hi-res codec product, and buying it hoping for LDAC will end in disappointment. Pick the AeroFit only if awareness, comfort, and IPX7 waterproofing matter more to you than codec quality — and for a lot of runners, they honestly do.
what is ldac headphones
LDAC is a Bluetooth audio codec that allows much more data to travel wirelessly than standard SBC, which is why it is associated with hi-res listening. "LDAC headphones" is shoppers' shorthand for headphones or receivers that support that codec. In this comparison, the 1Mii B06Ultra supports LDAC; the Anker Soundcore AeroFit does not list it.
what is ldac support in headphones
LDAC support means a device can receive or transmit audio using Sony's LDAC codec, typically up to 24bit/96kHz at a 990kbps bitrate. Both the source (your phone) and the sink (your headphones or receiver) need to support it for the benefit to apply. The B06Ultra also covers aptX HD, aptX Low Latency, AAC, and SBC for devices that lack LDAC.
what is ldac codec in headphones
The LDAC codec is the compression method itself — the rulebook for how audio is packed and sent over Bluetooth. Higher bitrate codecs like LDAC preserve more musical detail than SBC, which is the whole appeal for critical listening. In the B06Ultra, LDAC feeds an ES9018K2M DAC chip, so the decoding happens in dedicated hardware rather than in your speakers.
what is ldac sony headphones
LDAC was developed by Sony, so "LDAC Sony headphones" usually refers to Sony models that carry the codec natively. The important takeaway for a buyer is that LDAC is not exclusive to Sony hardware — 1Mii implements it in the B06Ultra receiver. If your phone supports LDAC, the B06Ultra can take advantage of it regardless of which brand made your headphones or speakers.
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