TAS Commitment
Description
HiBy R8 II – Your Personal Concert Hall in the Palm of Your Hand
Engineered for audiophiles who demand nothing but the best, the HiBy R8 II redefines portable Hi-Res listening with cutting-edge technology and premium craftsmanship. Powered by HiBy’s exclusive Darwin-MPA Architecture, this digital audio player delivers unprecedented sonic accuracy and musicality that emulates the grandeur of a live concert hall.
At its heart is a 16-way current-mode DAC with Multiphase PWM Array (MPA) technology, enabling exceptional soundstage, clarity, and energy efficiency. With dual independent Class A/AB headphone amplification circuits driven by ADA4625-2 op-amps and 16 customized transistors, the R8 II achieves zero crossover distortion, ultra-fast transient response, and finely controlled dynamics.
Whether you’re powering sensitive IEMs or demanding full-sized headphones, Turbo Mode unleashes a 25% power boost for even more headroom and authority. Select between Class A mode for richer tone and depth, or Class AB mode for longer battery life.
Encased in a high-gloss stainless steel chassis and wrapped with a luxurious Alcantara back panel, the R8 II is a statement piece as much as it is a technical marvel. Inside, it features independent power rails for digital, DAC, preamp, and amp stages, ensuring ultra-low interference and maximum fidelity. The massive 12000mAh battery, encased in a pure copper frame, offers extended playback—up to 21 hours in SE mode—while remaining cool under pressure.
Running open Android 12 OS on a Qualcomm 665 SoC with 8GB RAM and 256GB storage, the R8 II supports systemwide bit-perfect playback, HiByCast remote control, and 16x MQA unfolding, along with native DSD, PCM, and USB Audio output. Whether used as a reference-grade DAP or as a centerpiece in your home setup, the HiBy R8 II is built to perform at the highest level.
Key Features:
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🎶 Darwin-MPA Architecture with 16-way current mode DAC
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🔊 Dual Class A/AB Headphone Amplification with Turbo Mode
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⚙️ Dual ADA4625-2 OPAMPs + 16 Custom Transistors
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🧠 Qualcomm Snapdragon 665 | 8GB RAM | 256GB Storage
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🔋 Massive 12000mAh Battery with up to 21h playback
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🎧 Dual Headphone Outputs – 3.5mm SE + 4.4mm Balanced
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📱 Android 12 OS with Systemwide Bit-Perfect Playback
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📡 HiByCast Systemwide Remote Control Support
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📦 High-Gloss Stainless Steel Chassis + Alcantara Back
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🌀 Pure Copper Battery Case for Heat Dissipation
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🎼 16x MQA, DSD Native, PCM Decoding
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⚡ USB Type-C 3.2 Gen2 + 20W PD2.0 Fast Charging
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The product has a sturdy build and the ring light adds a clean, aesthetic touch that enhances its overall look. Using it with my KZ Castor Harmon Edition feels like listening to my favorite song for the very first time, with sound quality that is clear and immersive. It works smoothly with both Samsung devices and Windows, and the customization options on Windows make it highly versatile. The quick delivery in just one day was the icing on the cake, making this a well-rounded purchase that combines design, performance, and convenience.
Pairing this Harman Target Version with a Samsung A17 playing Apple Music and FLAC files and Fiio X1 DAP as a secondary source with FLAC files. When tuned to give preference to Mids as i prefer to hear the voices more than anything else, this comes out as a sweet sounding combination and tracks like Racy Chapmans Fast Car and Massive Attacks Teardrop shine beautifully. The Castor Pros are best listened at about 40% volume and and infact they do actually sound amazing at a high volume for bass heavy tracks such as EDM but for Trance and Rock the cymbals and snare drums sound better at 40%. This pair of iems and the combo sounds like money well spent so far and next i want to try analytical IEMs like the 7Hz. Thanks to the Audio Store for the rushed delivery.
Great purchase... excellent product
Good Product as expected
Worth every penny! This is not for bassheads as it lacks just a bit on the bass department, but the separation is awesome and the sound stage is also huge. Awesome for gaming as well! (Apex Legends, Arc Raiders, PUBG)
This is the replacement for my purchase of moon drop dsp chu2 which I bought in aug 2025 i don't know how it got damaged from last it stopped working on left side buds and after a few days mic also stopped working and i forgot to claim the warranty for it . So find this spare cable very helpful since I love these IEMS for real Tq AUDIO STORETEAM FOR THE smooth delivery
Great job on packing of the product. As a gamer I can say that, for fps games like PUBG , CS2 etc., Castor Pro is the best in under ₹2000
I recently bought this and am incredibly impressed with it. The build quality feels solid and premium right out of the box.
When it comes to performance, the amplification is fantastic—it delivers a clear, noticeable boost to the audio power and volume without sacrificing clarity. It is also incredibly easy to use; completely plug-and-play with zero hassle.
An awesome bonus is the inclusion of the Type-A to Type-C dongle/adapter. It makes it incredibly versatile to connect to different devices right away without needing to buy extra accessories.
Overall, it's a great purchase and definitely worth the money. If you are on the fence, just get it!
As an all rounder it fits my taste quite well,the only problem it really has is the male vocals being a bit recessed (not terribly recessed if you use vocal eartips),they are a tad bit overpriced seemingly,divine planar might be better,but for people looking for a fun entry into iem's,it's worth the price (some people say it's included DAC isn't enough,it works well enough as a temporary solution,yet to test if a dac makes a big difference or not).
Unsure if this is how most iem's are but the cable felt a tad bit short.
I had never used an IEM before, so this was my very first experience and I was genuinely impressed. As someone who loves music, I can confidently say this is one of the best investments you can make for audio quality. The sound is exceptional and absolutely worth the price.
To get the best possible audio experience, I would also recommend pairing it with a good-quality DAC, as it significantly enhances the overall output. ....
This is the most balanced sounding IEM I've used in this price. I am using the Type C variant, and I haven't experienced any issue regarding the playback whatsoever. It is equipped with the DAC chip CX31993, which is found on the dedicated DACs around the price of 1K. The cable is also a 4-core silver plated copper one, with really nice build quality. These are also really responsive to EQ Settings, tweaking the audio balance using a 10 or 31 band EQ makes the experience even more versatile.
The only cons I have noticed are regarding the in-box ear tips, I didn't find them to be very comfortable, so I had switch them with some other ear tips. Although, the metal built of the IEMs give them a really premium feeling, the glossy surface is extremely prone to scratches and they still get scratched even after using cautiously.
It is best in budget dac.
Save money get this dac-amp
It is good but could be a bit sharp sometimes may be balanced by EQ. But one problem in my type C unit, after 3 days it stop sound out of nowhere, while listening music, or watching movie/yt. Have to plug out plug in to get the audio back.
This is a magical DAC, I don’t believe ki isne mere headphones main jaan daal di ho
Really the quality of aurora ultra is out of the box , literally if you never use an iem and experience first time you feel actual music. Aurora ultra give life best experience.
This is only possible because of the audio that my first experience and the audio store surve there best to just create my best experience thanks a lot for protective, timely delivery and
Again thanks for giving that service and seamless experience to the team
