R3 II has a hard limit of, IIRC, 50,000 tracks in the database. You can browse the file system as a workaround, but not all people are okay with that. The R4, being an Android based DAP, does not have that limitation. edit: I know, not an answer about sound quality. Just an important thing to consider. Answer from user_none on reddit.com
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Reddit
reddit.com › r/digitalaudioplayer › hiby r3 ii or hiby r4?
r/DigitalAudioPlayer on Reddit: Hiby R3 II or Hiby R4?
April 26, 2024 -

I recently bought the R3 II (it has some features that I don't really like but it works perfectly fine), and i recently saw the R4 and I fell in love with the design, however I don't want to buy it and leave my R3 to find it's not much of an upgrade so what are the advantages over the R3 (sonically speaking) apart from Android system, is it worth the upgrade?

Rn I'm using the R3 with the Fiio JH5, JH3 and the EPZ Q5, not much of a high end of headphones but they get the job done.

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Mobileaudiophile
mobileaudiophile.com › home › daps
Hiby R3 Pro II Review : Small Size, Serious Performance!!
August 24, 2025 - Especially within the last year or so as we’ve seen devices like the Tempotec V3 Blaze, the Fiio JM21, Shanling M1 Plus among others. Shoot, even the Hiby R4 ($249) is close to that price point. In my opinion (I have yet to hear the Blaze), I find the R3 Pro II to be the best audio quality dap in the range.
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Headfonia
headfonia.com › source › portable source › hiby r3 ii review
HIBY R3 II Review - Headfonia
November 2, 2023 - The previous R3 Pro Saber 2022 DAP was commendable, but the latest version surpasses it in terms of enhanced usability, a simplified UI, and superior design. However, some may question the worthiness of an upgrade.
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Headfonia
headfonia.com › source › portable source › hiby r3 pro ii review
Hiby R3 Pro II Review - Headfonia
November 29, 2025 - So, it comes down to two things: a smooth, more musical, dynamic sound (R3 Pro II) versus a flat, neutral one (R4), and a much smaller footprint and a much more compact solution (R3 Pro II) versus a full-size, big-screen DAP (R4).
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Reddit
reddit.com › r/digitalaudioplayer › 1 week in with hiby r3pro ii pros and cons
r/DigitalAudioPlayer on Reddit: 1 week in with hiby r3pro ii pros and cons
1 month ago - HIby R3 Pro ii · r/DigitalAudioPlayer • · 2 · upvotes · · comments · Rate my bootleg android dap · r/DigitalAudioPlayer • · upvotes · · comments · New Hiby R4, what apps do I need? r/DigitalAudioPlayer • · upvotes · · comments · Hiby R3 II or Hiby R4?
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Headfonia
headfonia.com › source › portable source › hiby r4 review
HIBY R4 Review - Headfonia
May 2, 2024 - Against the R6 III, the R4 has an identical size but its chassis feels more premium with full aluminium casing. It doesn’t have a volume wheel if that’s important for you. The R6 III has more RAM and onboard storage, but I don’t believe ...
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Head-Fi.org
head-fi.org › home › forums › equipment forums › portable source gear
HiBy R4 | Page 9 | Headphone Reviews and Discussion - Head-Fi.org
March 29, 2024 - Looking at pricing you have the R3 II at $179 the R4 at $249 and the R5 II at $349 currently. Not much of price difference between them. My assumption was the R4 is replacing the R5 II since they both have a Class A amp and the R5 II is 2 years old.
Find elsewhere
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Reddit
reddit.com › r/digitalaudioplayer › hiby r3 pro saber vs 2022 version
r/DigitalAudioPlayer on Reddit: Hiby R3 Pro Saber vs 2022 version
November 20, 2022 -

Hi everyone, I bought a Hiby R3 Pro Saber a few days ago and just noticed that the 2022 version does exist and cost about $30 more than the one I got.

Is it worth it to return them and get the new model? What about if I'm not using it with powerful headphones or balanced cables? Is there a difference in soundstage, imaging or instruments separation between the two? Please let me know 🙏

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HiBy
store.hiby.com › home › hiby r3 pro saber 2022 specifications
HiBy R3 Pro Saber 2022 Specifications
Audio specifications Table header 0 3.5mm PO 2.5mm BAL Test conditions 32 ohms loaded 32 ohms loaded Output power 101mW 340mW Maximum output voltage 1.8Vrms 3.3Vrms Rated output voltage 1.5Vrms 2.6Vrms THD+Noise 0.00002 0.00002 Residual noise ≤2.5uV ≤3uV Signal to noise ratio (SNR) 118dB ...
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HiBy
store.hiby.com › home › hiby r3 ii 2025 - hifi music player with hibyos
HiBy R3 II DAP - HiFi Music Player with HiByOS | HiBy
R3 II 2025 : A tiny music treasure chest All-new X1600E SoC|All-new intuitive UI|340mW@32Ω High output power|Dual ES9219C|3.2” touchscreen|Self-powered USB audio dongle|Dual independent audio frequency oscillators|Native DSD256 ...
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HiBy
store.hiby.com › home › r3 ii review › r3 ii review
HiBy R3 II (GEN II) Review: Compact DAP with Dual DAC, Touch Screen
March 1, 2024 - Moreover, HiBy is also a highly experienced company in development of Software’s such like the HiBy Music application for Android & iOS devices and of course HiBy OS that is a widely used professional Portable Audio Operating Systems (OS). The R3 II (GEN II) that I will now review for you is HiBy’s recently released Ultra Portable “Digital Audio Player” (DAP), which is the latest member of the R3 Series.
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Reddit
reddit.com › r/digitalaudioplayer › hiby r3 pro ii review
r/DigitalAudioPlayer on Reddit: HiBy R3 Pro II Review
July 5, 2025 -

I've been using the HiBy R3 Pro II for a few weeks now, and I wanted to share my thoughts on this DAP so far.

TL;DR: The HiBy R3 Pro II is a fantastic DAP with excellent build quality, outstanding audio performance, and comprehensive connectivity options. While the UI has room for improvement, it's a solid device overall.

I'll cover what I feel most important, however, if I skip something you're interested in, I'm more than happy to expand.

So let's get started then:

Build Quality

The R3 Pro II is exceptionally well-built. It feels solid in hand with a satisfying weight that conveys quality. The Ultrasuede back was the primary reason I chose the R3 Pro II over other HiBy OS DAPs—it feels absolutely wonderful to hold, provides excellent grip, and is a refreshing change from the usual textureless backs found on most devices.

The buttons have a nice tactile feel, though the layout takes some getting used to initially. The status light on the power button is a nice touch (though it can be disabled in settings if you prefer).

Audio Performance

Simply put, it's perfect. Out of the box, the R3 Pro II has a conservative volume limit, but you can adjust this through developer options. On high gain, it easily drives my HD650s without breaking a sweat, while low gain provides more than enough power for any IEM.

A standout feature is MSEB, a HiBy OS exclusive that lets you fine-tune the sound to your preferences. Unlike traditional EQ, you're adjusting the overall sound signature rather than specific frequency responses, which feels more natural and musical.

User Interface

This is where the R3 Pro II has the most room for improvement.

The overall UI is attractive, mostly responsive, and intuitive to navigate. Settings are easily accessible, and most functions work as expected.

However, the library views—where it matters most—are problematic. The "Artists" view lists featured artists and collaborators as separate entries (similar to the iPod Classic), which becomes annoying with larger libraries and could be a dealbreaker for some users. The "Album Artist" view is similarly clunky. While it lists artists cleanly, it doesn't allow browsing by albums, instead displaying all tracks in a single list, making it nearly useless for my needs.

If HiBy implemented the filtering and sorting options from the Artists view into the Album Artist view, it would dramatically improve the experience for users with extensive libraries.

Other library views work as expected without issues.

Wired Connectivity

The R3 Pro II offers excellent connectivity options with 3.5mm, 4.4mm balanced, and USB-C connections.

The balanced 4.4mm output on high gain is impressively powerful—I could drive my HD650s comfortably at 60-70% volume, well above my usual listening levels.

The USB-C port is remarkably versatile, supporting both input and output DAC functionality. USB DAC mode worked flawlessly with my MacBook Pro, handling everything up to 32-bit/384kHz. I was even able to connect a USB-C dongle DAC (CB1200AU), which was detected and worked perfectly.

Wireless Connectivity

Bluetooth connections proved stable with excellent range, though there's noticeable latency (200ms-1s at worst in my testing).

I tested with TRN BT20 Pros and Sony WH-1000XM3s using both AAC and LDAC codecs—both worked flawlessly. While I don't have aptX devices to test, I expect they would perform equally well.

Connecting my iPhone 16 Pro Max via Bluetooth was seamless with rock-solid stability. The practical utility of this feature is debatable, but it works well when needed.

WiFi performance is solid despite only supporting 2.4GHz. The connection remained stable throughout testing, and I could stream Qobuz and Tidal up to MQA without issues. Both streaming service interfaces work well, allowing easy access to your library, playlists, new releases, and recommendations.

HiBy Link worked adequately—I could connect my phone to browse music and control the R3 Pro II remotely. However, it didn't perform as well as expected and only worked over WiFi in my testing, though it's supposed to work over Bluetooth as well. This isn't a concern for me since it's not a feature I'd use regularly.

The Import Music via WiFi feature worked well. The web interface is minimal but functional, allowing you to browse the SD card and upload/download files at reasonable speeds.

I didn't test the DLNA functionality.

Battery Life

Battery performance is excellent. I achieved around 15 hours of mixed use (Bluetooth and wired listening, frequent screen use, WiFi enabled, lots of tinkering). With more conservative usage, 20+ hours should be easily achievable. Standby time is outstanding—I never noticed battery drain when the device wasn't in use.

Conclusion

The HiBy R3 Pro II is an outstanding DAP that excels in build quality, audio performance, and connectivity options. While the user interface has some shortcomings, particularly in library management, the overall experience is very positive.

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Headfonics
headfonics.com › home › dap › hiby r4 review
HiBy R4 Review — Headfonics
February 13, 2025 - Since I have the M300 and R3 Pro, both will be compared and after reading much on forums I would argue that the R4 is not only in its own HiBy niche but is a complimentary option to the R3 II.
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Head-Fi.org
head-fi.org › home › head gear › head gear › portable source components › digital audio (flac/mp3/etc) players (daps)
HiBy R3Pro II - Reviews | Headphone Reviews and Discussion - Head-Fi.org
Especially within the last year or so as we’ve seen devices like the Tempotec V3 Blaze, the Fiio JM21, Shanling M1 Plus among others. Shoot, even the Hiby R4 ($249) is close to that price point. In my opinion (I have yet to hear the Blaze), I find the R3 Pro II to be the best audio quality ...
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HiBy
store.hiby.com › home › r3 ii review › r3 ii review
Some Information Before the Release of HiBy R3 II - HiBy | Make Music
August 16, 2023 - The R3 series carries HiBy's aspirations and hard work. Over these five years, HiBy continuously swapped out DAC chips, introducing models like the R3 Pro (dual DAC), R3Pro Saber (dual ESS DAC), and the latest R3Pro Saber 2022 with a brand-new DAC chip. Each product upgrade aimed to better fulfill user needs.
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HiBy
store.hiby.com › home › r3 ii review › r3 ii review
HiBy R3 II Review - Pocket-Sized DAP with Dual DACs & Balanced Output
March 1, 2024 - We review the HiBy R3 II, which is a 2nd-generation pocket-sized HiBy OS digital audio player offering up to DSD256 and 380mW of output power. It is priced at $179 MSRP. Disclaimer: This sample was sent to us in exchange for our honest opinion. Headfonics is an independent website with no affiliate ...
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Head-Fi.org
head-fi.org › home › head gear › head gear › portable source components › digital audio (flac/mp3/etc) players (daps)
HiBy R3 II - Reviews | Headphone Reviews and Discussion - Head-Fi.org
And now what I have here is HiBy's latest entry-level DAP, The HiBy R3 II. This device is a successor model of both R3 Pro Saber 2022 and R3 Pro Saber regular but this set has some improvement and substantial upgraded features that differentiate itself from its predecessors.
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HiBy
store.hiby.com › home › r3 ii review › r3 ii review
HiBy R3 II Review: Affordable DAP with Dual DAC & Touch Screen
March 1, 2024 - Discover the HiBy R3 II Digital Music Player review. Affordable at $179, featuring dual ES9219C DACs, 3.2" touch screen. Perfect for audiophiles on the go.
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Head-Fi.org
head-fi.org › home › forums › equipment forums › portable source gear
NEW HIBY R3PRO II - Dual DAC - Longer Battery Life | Page 5 | Headphone Reviews and Discussion - Head-Fi.org
May 28, 2025 - r3 pro ii use quality 1622 and this opamp sound analytic ,with same dac chip , i hope opa1622 opamp will give more technical sound then r1.there is no review but andy will make review on his yotube channel soon, i am waiting his r3 pro ii review .thanks · Click to expand... Forgive me, but unfortunately I don't have such a trained ear. I like setups that sound good, but I'm not an expert at all. In my case, I have to admit I don't hear any differences between the DAPs I've tried—they all sound good to me, I don't notice any difference. I'm talking about the Hiby R4, Fiio JM21, Tempotec V3 Blaze, and R3 Pro II.