ROSESELSA Openfree Review – Open Ear Wireless Earphones with LDAC/LHDC
ROSESELSA OpenFree is an open-ear style wireless earbud designed for users who want to enjoy music while being fully aware of their surroundings. The pair supports the latest Bluetooth V5.4 connectivity with advanced protocols including LDAC, LHDC, LC3, etc. ROSESELSA has designed the pair with equal-loudness contour technology, which enables the pair to produce a 360° spatial sound field, offering a stereo experience to the listeners.
The pair is equipped with an independent audio module featuring Cadence HiFi DSP chipset. It delivers a silky smooth sound with impactful bass and melodious treble. ROSESELSA has tuned the pair with air audio compensation algorithms that enable a strong bass response, overcoming the traditional low-bass issue faced by open-ear design earbuds.
Unique Open-Ear Layout
ROSESELSA OpenFree brings you complete wire freedom with its unique open-ear layout. The pair rests outside your ear canal, allowing you to hear ambient sounds and communicate with your surroundings easily. It is suitable for outdoor activities or situations where awareness is important, while keeping you entertained with your music.
Powerful Sound Performance
ROSESELSA has designed the OpenFree earbuds with multiple technologies that enable the pair to produce a captivating and immersive sound response. The pair has equal-loudness contour tuning technology that is more in line with auditory characteristics. They faithfully reproduce minute audio details and captivate the listener with an immersive sound profile.
Complete Privacy Protection With Acoustic Beamforming 3.0 Technology
ROSESELSA OpenFree earbuds are equipped with Acoustic Beamforming 3.0 technology. It isolates the front and back of the diaphragm into independent chambers and outputs sound through the directional transmission panel; audio is produced at a calculated specific angle. It greatly reduces sound leakage by over 99%, allowing the listeners to enjoy their music freely.
3D Ergonomic Design
ROSESELSA OpenFree earbuds feature a comfortable 3D ergonomic design. The design is crafted with a stable balance point with hyperbolic surfaces. It doesn’t put unnecessary strain on the ears and provides a comfortable wearing experience for the users.
The earbuds are made up of soft, antibacterial silicone material. Its design is optimized so that people can also wear sunglasses. They are equipped with an OpenHealth hearing protection algorithm that effectively reduces hearing fatigue and ensures a comfortable music listening experience.
Crystal Clear Voice With AI Call Noise Reduction Technology
ROSESELSA OpenFree earbuds feature an AI Call Noise Reduction Algorithm. It automatically cuts down on the surrounding noise and provides crystal clear voice transmission for voice calls, business calls, and other scenarios.
IPX4 Water Resistant Design
ROSESELSA OpenFree earbuds feature an IPX4 waterproof rating. It is sweat and splash resistant, making the earbuds an ideal choice for outdoor activities like Cycling, Jogging, etc.
Stable Bluetooth V5.4 Connectivity with High-Resolution Codec Support
ROSESELSA OpenFree earbuds support stable Bluetooth V5.4 connectivity. The earbuds support advanced high-resolution codecs such as LDAC, LHDC, etc. Users can enjoy high-definition music quality with the OpenFree earbuds. The earbuds also support low-latency gaming mode with LC3 wireless codec support.
Outstanding Battery Life
ROSESELSA OpenFree earbuds have an amazing battery life of up to 52 hours. The earbuds offer up to 10 hours of playback per charge, with the charging case, this is increased to 52 hours. Enjoy seamless music without worrying about the battery running out.
Features
- Fully Open-Ear Design.
- Equal-Loudness Contour Technology.
- 10mm Topological Dynamic Driver.
- Composite Dynamic Diaphragm Dynamic Driver.
- Independent Audio Module with DSP Functionality.
- Bluetooth V5.4 Connectivity.
- Cadence HiFi DSP Chipset.
- Acoustic Beamforming 3.0 Technology.
- No Audio Leakage with Isolated Design.
- 3D Ergonomic Shape for Comfortable Wearing.
- IPX4 Waterproof Rating.
- Outstanding Battery Life(Up to 52 Hours).
- AI Call Noise Reduction Algorithm.
- Supports Hi-Res Codecs(LDAC, LHDC, etc.)
- Gaming Mode with Low-Latency LC3 Connectivity.
- Concise & Ad-Free Dual-Device Connectivity.
- Three Color Options.
Specs
- Vocal System: Dual Channel
- Wireless Version: 5.4
- Connection Range: ≤10m
- Waterproof Level: IPX4
- Frequency Response: 20-20kHz Range
- Earphone Battery Capacity: 45mAh
- Impedance: 32 Ω
- Charging Compartment Battery Capacity: 500mAh
- Driver Unit: 10mm Topological Dynamic Diaphragm
- Encoding Format: LDAC/LHDC/SBC/AAC/LC3
- Price: $45.99
Disclaimer: The Openfree was kindly provided by rosetechnics.com for review.
Roselink App
The ROSESELSA Openfree comes with the AAC/SBC codec by default. But you can change it to LDAC, LHDC, or LC3 in the Roselink App. You can also enable Game mode for a latency of 20ms.
You can also change the EQ profile from Balance to Bass. And you can also change the default touch controls.
Sound
The open-air design of the ROSESELSA Openfree means they offer a remarkably spacious and wide soundstage, which you wouldn’t normally get from in-ear style headphones.
There are a few downsides to the open drivers, though. For one thing, they let in a lot of environmental sounds, which is exactly what these headphones are designed to do – and that means all the detail you’re getting from your music can be muddied by the chatter of people talking nearby, the rumble of cars driving by, and other ambient sounds.
The fact that the headphones don’t create a seal against your ear canal also means the bass response isn’t robust, and as such, you don’t get that highly emotive, chest-thumping experience from tracks that have a powerful low end.
Those are the tradeoffs you’re making for a pair of headphones that can be worn all day long and used for any situation, whether that’s taking calls, listening to podcasts, working out, or casually listening to music while working. The sound leakage you’d expect to irritate anyone in your immediate vicinity isn’t nearly as bad as we thought it would be, either.
Lows
The bass is okay, but it could be a lot richer and deeper. That’s to be expected from a pair of headphones with this open design, as earbuds that close off the ear canal completely elicit a more powerful bass response. If you’re listening to hip-hop, electronica, or anything with a big bassline, you may be disappointed by the sound of the ROSESELSA Openfree.
Even so, the excellent balance offered by the Openfree means that the trebles and mids don’t sound overpowering in comparison to the bass.
You’ll get good clarity from the bass, but not much volume from it. With the right tracks, the bass can come out and show some organization, but you won’t get much weight from it. The bass profile doesn’t make too much of a difference either, no matter how much you boost. At best, you can achieve a just noticeable difference in tone, but not much else.
Mids
The vocals sound clear and detailed as the instruments descend into the chorus, each playing to its rhythm. As the different rhythms become more complex and more instruments and voices enter the mix, the Openfree has the accuracy to ensure they sound distinct, without sounding disharmonious.
Everything mostly falls into the right place in the midrange. Instruments and other sound elements appear full in the mix, but there is some notable fogginess. It’s not always the most elegant response, but the presentation is lively enough to give the mids an edge.
Instruments are done justice by the Openfree’s roominess, making their appearance in the mix easy to identify. Aside from some instances of precision, the Openfree doesn’t paint much detail beyond the surface of the tone. The actual timbre of the notes being hit is quite smooth, though, as the Openfree does the best it can to express things naturally.
Highs
The Openfree doesn’t have the most vibrant treble, but the texture of it is very enjoyable. It’s a smooth response that isn’t too bright or relaxed, but rather somewhere in the middle. Using EQ develops the timbre into an airier feel, which complements the openness of the sound signature overall.
Technicalities
ROSESELSA Openfree offers plenty of detail, excellent rhythmic accuracy, and a well-balanced soundstage that allows every instrument in your favorite songs to come through with clarity.
In terms of the soundstage, the open part of the Openfree name should clue you in on what these headphones feel like. I’m struggling not to compare this to the feeling you get from open-back headphones, but it’s closer than you might think.
Everything about the Openfree’s soundstage appears to me like the sound is coming from the open air rather than from the drivers. Its spatial imaging gives you some surprising precision, with some impressive layering that adds dimension and separation to its sonic environment. You won’t get more outside headspace on any wireless headphones in this price range.
Sum-Up
The audio quality is very good for an open design like this, with a remarkably wide soundstage that gives every instrument in your favorite songs the room they need to shine. Detail, clarity, and rhythmic accuracy are also very good.
The open fit does come with some drawbacks, though; the bass response isn’t particularly powerful, and being able to hear your environment means the detail you get from the Openfree can be obscured by whatever’s going on in the background.
Still, those are the things you sacrifice for an open-air design. If you want chest-thumping bass and the sensation of pure isolation when you listen to music, look for a pair of noise-canceling earbuds instead. But if you’re on the hunt for something a little different, the ROSESELSA Openfree is worth taking a chance on for just $46, supporting LDAC, LHDC, and LC3 codecs.