HiBy FC4

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  • HiBy FC4
  • HiBy FC4
  • HiBy FC4
  • HiBy FC4
  • HiBy FC4
  • HiBy FC4

HiBy FC4

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The HiBy FC4 is a portable USB DAC/headphone amp, with high driving power and MQA support.  Can be connected to smartphones / computers etc. for use as audio out!  High driving power, detailed and energetic sound make the FC4 stand out from the crowd.

Android Lossless Digital Music Player

Dual ES9038Q2M, Snapdragon 660 SoC, 5.0'' 1080P large hi-res display, Open Android 9, MQA 16x unfolding, DSD512, 4GB RAM + 64GB storage

Sound of Harmony

Delivers a balanced yet inspiring audio performance in bold, muscular visual fashion, while providing a silky smooth and snappy user interface.

A classic revamped

The R6 redesigned with the new R series design language—bold, muscular straight lines.

Japanese Alps rotary encoder

Japanese Alps rotary encoder for smooth volume adjustments.

Fast and mature SoC

Utilizing an upgraded Snapdragon 660 SoC, the R6 has speed and stability in spades, as can be expected when combined with the mature Android HiBy OS.
4nm LPP process; class-leading 8-core Kryo 260 architecture; speeds up to 2.2GHz; Adreno 512 GPU. 4GB RAM + 64GB storage + up to 2TB storage expansion via micro SD card.

Dual ES9038Q2M

Upgraded to dual ES9038Q2M with native support for DSD512, 32bit / 768kHz, both DACs in operation for both SE and balanced output! Utilizes current-mode output for even better noise rejection—for the cleanest backgrounds to your pure listening enjoyment.

Dual crystal oscillators

High-accuracy, low-phase-noise crystal oscillators dedicated to 45.1584and 49.152MHz, for flawless low-jitter performance for music at any sample rate.

All new power supply circuit design

Line and amplification stages driven by two independent isolated power supplies for cleaner, more powerful dynamics.

Audio circuit design

OPA 1612 as the line stages, coupled with low-ESR Panasonic POSCAPs and pro-audio grade Elna caps for a balanced yet inspiring audio performance that easily handles all music genres.

Multiple audio outputs

Both 3.5mm SE and 4.4mm balanced ports can act both as line out and headphone outputs. Drive headphones directly, drive a headphone amp, drive an outboard DAC… the sky's the limit.

1080p large hi-res display

A graphical performance as finely detailed and colour-accurate as the audio! 5.0” Corning Gorilla glass; 1920x1080 resolution; 443ppi; 16:9; oleophobic-coated. Supports advanced user-friendly operations such as tap-to-wake, triple-finger-downswipe to screencap.

HiBy OS updated to Android 9

HiBy OS is HiBy’s in-house developed rebuild of the Android system architecture, optimized for bit-perfect audio, unlike stock Android. Now updated to Android 9, supports the R6 in all desired audio I/O roles such as USB audio in / out, Bluetooth audio in / out simultaneously for unlimited flexibility.

Systemwide Direct Transport Audio Architecture

Bypasses Android's sample rate conversions at the system level for bit-perfect audio output.

MQA (Master Quality Authenticated) rendering to 16x

HiBy R6 includes MQA technology, which enables you to play back MQA audio files and streams, delivering the sound of the original master recording. MQA’ or ‘MQA Studio’ indicates that the product is decoding and playing an MQA stream or file, and denotes provenance to ensure that the sound is identical to that of the source material. ‘MQA Studio’ indicates it is playing an MQA Studio file, which has either been approved in the studio by the artist/producer or has been verified by the copyright owner.


Install the HiByMusic app on your Android or iOS smartphone and you can control the R6 from afar using WiFi or Bluetooth, for browsing, playing, skipping tracks, adjusting volume, etc.

MSEB Systemwide MSEB tuning

The MageSound Eight-Ball (MSEB) is HiBy's in-house researched sound tuning algorithm for adjusting desired audio qualities such as warmth, note thickness, vocal positioning, etc. directly instead of splitting the audio up into numbered frequencies. On the R6 it is available as a systemwide module for effecting all audio played on the device.*

*other than MQA, which MQA prohibits from modifying. 

Hi-res Bluetooth codecs

Sporting Bluetooth 5.0, the HiBy R6 supports Bluetooth audio in both input and output directions, with advanced codecs such as UAT, LDAC, aptX, aptX HD, AAC, SBC, etc.

Effortless connectivity

Strong 2.4GHz and 5GHz signals for fast, stable connection online to get your favourite music.

Wireless control

Supports DLNA and AirPlay* remote playback and music file transfer via WiFi.

* Install a third-party Airplay receiver app that can receive Airplay from iDevices.

Playtime for all time

Up to 8.5 hours (balanced ) or 10 hours (SE) continuous play time. Up to 25 days standby time.

USB3.1 / Type-C

Faster data transfer, QC3.0 fast charging, supports coaxial digital output.

Look at me


ModelNew HiBy R6
Operating systemAndroid 9.0
SoCSnapdragon 660
CPU architecture8x Kryo 260 cores
CPU speed2.2 GHz
GPUAdreno 512
DACES9038Q2M x 2
WiFiSupports 2.4GHz, 5GHz
BluetoothBluetooth 5.0
Display size4.97 inches
Display colour16.8 million colours True Colour
Display architectureIPS
Density443 PPI
Internal storage64GB
External storageUp tp 2TB + via 1 micro SD card
Colour choicesSilver / black
Body materialAluminium alloy
Dimensions130*73*15 mm
Power source5V⎓0.5A / 9V⎓2A
Battery size4500mAh
Charging timeAbout 3 hours
Firmware upgradesOTA (over-the-air) online updates
Font sizeAdjustable
APP third party applicationsUnlimited installation


ModelR6R6 Pro
DACES9028Q2M x 2ES9028Q2M x 2
Operating systemAndroid 6.0/8.1Android 6.0/8.1
SoCSnapdragon 425Snapdragon 425
Crystal oscillators22.579MHz, 24.576MHz45.158MHz, 49.152MHz
Op ampOPA1612 x 3MUSE8920 x 4
Headphone ampTPA6120A2 x 2SSM6322 x 2
PMC & DSD supportPCM384kHz/32Bit, DSD256PCM384kHz/32Bit, DSD256
Output power (32Ω)3.5mm PO: 120mW
2.5mm BAL: 300mW
3.5mm PO: 245mW
4.4mm BAL: 750mW
Output modeVoltage-mode outputCurrent-mode output
Output ports3.5mm PO, 2.5mm BAL, 3.5mm LO/COAX (share)3.5mm PO, 4.4mm BAL, 3.5mm LO/COAX (share)
Display4.2'' 768p4.2'' 768p
Bluetooth codecsSupports two-way Bluetooth
Bluetooth input: SBC, AAC, LDAC, UAT  
Bluetooth output: SBC, AAC, aptX, aptX HD, LDAC, UAT
Supports two-way Bluetooth
Bluetooth input: SBC, AAC, LDAC, UAT  
Bluetooth output: SBC, AAC, aptX, aptX HD, LDAC, UAT
WiFiSupports 2.4GHz, 5GHz
Supports 2.4GHz, 5GHz
AntennaInternal FPCInternal FPC
Playtime12 hours (SE) or 7 hours (BAL)12 hours (SE) or 8 hours (BAL)
WeightAluminum alloy: 198g
Stainless steel: 275g
Aluminum alloy: 198g
Stainless steel: 280g
Quick chargeQC3.0QC3.0

That sweet but powerful voice

Professional audio architecture, 340mW high driving power, 3.5mm SE and 4.4mm balanced output ports, dual DAC, MQA 16X, PCM768/DSD256 native decoding


"The HiBy FC4 has a very good power output to power usage ratio... If you plan on using full-sized headphones at times, the best choice would then be the FC4 due to its higher power output capability."

Full Review

Audiophile Heaven

"If you’re looking for a high quality DAC/AMP with good build quality, powerful output, a clean, clear and crisp sound, with good dynamics, HiBy FC4 should be a delightful experience."

Full Review


"What really surprised me was its sounds character and overall performance in this area, which is stands out with a mature, versatile and balanced tuning that shows pretty good synergy with almost any earphone that I have listen with this device."

Full Review

Featured In


"The HiBy RS6 is a deeply engaging and well-thought-out initial foray into the world of portable R2R Android DAPs... The ground-up conceptualization of Darwin and what it means to the portable audio user is probably the most salient aspect of all its features with that blazingly fast OS workflow already a staple of previous HiBy product releases. "

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Twister 6

"When I started testing RS6, I didn’t appreciate at first the power of Darwin architecture until fw 1.20 update and addition of new IEM presets... I realized how effectively and naturally this DAP could be finetuned without a need of EQ or MSEB effects... Also, RS6 is one of the fastest DAPs I have tested to date."

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"Hiby’s RS6 borrows a lot of technology from said D/A converters, choosing a higher engagement factor, flow and natural textures above anything else. If there’s a DAP that tries to elevate your mood and cover your body with goose bumps, then Hiby’s RS6 is definitely that one."

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@gLer - Headphoneus Supremus

"A great DAP is the sum of all its parts – features, performance, stability, design, UX and sound quality. In my experience, few other DAPs comes close to the RS6’s combination of features, flexibility and sound quality, and no other DAP offers all of that plus R2R in one sweet and shiny copper package. Highly recommended."

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"The HiBy RS6 is a wonderfully designed, elegant player that provides many features in a complete package. You have streaming, advanced DSP settings, DTA, Hi-Res Bluetooth, micro SD support, a very fast CPU with a clean UI, 4.4mm BAL and 3.5mm SE outputs in a very rigid copper chassis. This is a dream DAP when it comes to online music streaming. I appreciate HiBy’s first effort on their new, in-house “Darwin” R2R Architecture. I’m sure they can build upon this and reach greater heights. "

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Portable USB DAC/headphone amp

Computer sound card, HiRes certified, low power consumption, all-metal body, Bauhaus design, hardware volume control, RGB indicator light

Why use a USB dongle?

Recover a headphone port for your modern smartphone, giving voice to the large online library of lossless music available; higher detail compared to Bluetooth audio, hearing more musical details, bringing you back closer to the original music venue in experience.

Professional audio architecture

Containing circuitry on a level with professional full-scale HiBy Digital Audio Players, which is designed solely for high-res lossless music, replaying the original music in every detail, including all its energy and presence.

Independent FPGA-based dual independent crystal oscillator reclocking

Equipped with 45.158MHz and 49.152MHz dual dedicated audio crystal oscillators for effectively lower jitter, providing the whole audio system with a high precision, low jitter clock source.

Efficient USB receiver

Driven by a highly integrated 28nm USB receiver chip of high efficiency, with the 416M dedicated audio DSP onboard to realize the best balance between high performance and long runtime, effectively lowering consumption of smartphone's battery.

My dongle is powerful than yours

340mW+340mW @32Ω is nearly unheard of for a USB dongle but here it is! Easily drive all your HiFi earphones and even some full-size headphones! High driving power is the stuff of miracles! It will let your earphones handle all music styles with more aplomb than ever, a higher sense of energy without sacrificing any fine control or detail!

High performance by the numbers

High SNR, low absolute noise level and low THD all at the forefront of products of this class, making for a faithful rendition of the great music at your fingertips on a black canvas.

MQA 16X unfolding

The HiBy FC4 includes MQA technology*, which enables you to play back MQA audio files and streams by a factor of 16x, delivering the sound of the original master recording.

ES9219's integrated DAC supports MQA full decoding of 16x unfolding.

*The smartphone must be using apps supporting bitperfect and MQA (e.g. HiByMusic, TIDAL), in order for MQA unfolding to occur with the HiBy FC4 connected via USB.

Dual ES9219 DACs

Equipped with 2 of ESS technologies’ renowned ES9219 DAC chips, set to output to each channel independently, their strong decoding power not letting go of a single musical detail.

Hi-res support

Supporting up to PCM768kHz/32bit, DSD256 (native) decoding, edging on professional HiFi in decoding specifications, this will have no problems decoding all your usual lossless streaming formats.

3.5mm SE and 4.4mm balanced brought together

Includes 3.5mm SE and 4.4mm balanced ports--balanced in position too! The attention to detail inspires confidence.

Software integration

Seamlessly integrating with HiByMusic app’s USB exclusive mode, be confident of your smartphone’s bitperfect audio output to the FC4, fully unleashing the FC4’s hardware decoding / amplification power.

The HiByMusic App is a professional app for Hi-Res audio playback on Android and iOS, with over 3 million users worldwide, and its USB exclusive mode coupled with external USB DAC/headphone amps garners widespread praise from HiFi aficionados all around.

All-platform support

Supports use on Android / iOS / Mac / Windows as USB dongle / computer external soundcard. No charging required, driver-free plug-and-play.

Driver-free plug-and-play on Android / iOS / Mac / Windows 10

Hi-Res certified for hi-quality sound

Hi-Res certification your guaranteed ticket to good sound!

All-metal body

All-metal body in Bauhaus design language, black with luxurious gold trim.

Hardware volume buttons / hardware volume

30-step physical hardware volume button controlling hardware volume controller for best adaptability and lossless volume control.

RGB indicator light

Displaying different colours depending on what is being played:

Green: MQA

Blue: MQA Studio

Magenta: MQA Rendering

Yellow: ≤48k

Aqua: 64k-192k

Orange: 352.8k or above

White: DSD Red: Paused

What's in the box

①USB Type A to Type C interconnect 
②FC4 DAC/headphone amp product proper 
③Type-C to Type-C interconnect 
④Product packaging 
 ⑤User manual / warranty / certificate
* MQA Subscription Voucher

Hardware specifications

ModelHiBy FC4
Dimensions65.3*22.1*11.9 mm
Weight21.7 g
ChipsetES9219 * 2
ButtonsVolume up / down
Supported formatsPCM up to 768kHz/32bit, up to DSD256 native
RGB indicator lightStatus indicator
USB portType-C
Headphone out3.5mm TRS and CTIA-spec TRRS headsets
Balanced headphone out4.4mm balanced

Audio specifications

Table header 03.5mm PO4.4mm BAL
Output Level1.9Vrms (32Ω)3.3Vrms (32Ω)
Output Power110mW (32Ω)340mW (32Ω)
THD+N0.0008% (32Ω)0.0006% (32Ω)
Noise1.7μVrms (32Ω)2.2μVrms (32Ω)
SNR120dB (32Ω)123 dB (32Ω)
Dynamic Range120dB (32Ω)123 dB (32Ω)
Crosstalk Rejection72dB (32Ω)98 dB (32Ω)
Frequency response (-3dB)20-90Khz (32Ω)20-90Khz (32Ω)

HiBy R5 series comparison

Table header 0R5 Gen 1R5 Saber
DACDual CS43198Dual CS43198
Operating systemAndroid 8.1Android 8.1
SoC modelSnapdragon 425Snapdragon 425
Crystal oscillatorsDual crystal oscillators
45.158MHz, 49.152MHz
Dual crystal oscillators
45.158MHz, 49.152MHz
OP-AMPOPA1612 x 2OPA1642 x 2
Headphone AMPAD8397 x 2AD8397 x 2
Decoding support (max)PCM384kHz/32bit
Output power @32ΩPO:148mW
Signal to noisePO:120.5dB
Residual noisePO:2.1uV
Channel separationPO:71dB
Frequency response20-80K20-80K
Ports3.5mm SE/LO
4.4mm BAL/LO
3.5mm SE/LO
4.4mm BAL/LO
Battery capacity3500mAh3500mAh
Play timePO 18 hours
BAL 11 hours
PO 18 hours
BAL 11 hours
Display4.0” (540*1080)4.0” (540*1080)
BluetoothBluetooth 4.2Bluetooth 4.2
Bluetooth audio codecTwo-way bluetooth Bluetooth input: SBC, AAC, LDAC
Bluetooth output: SBC, AAC, APTX, APTX HD, LDAC, UAT
Two-way bluetooth Bluetooth input: SBC, AAC, LDAC
Bluetooth output: SBC, AAC, APTX, APTX HD, LDAC, UAT
WiFiDual band 2.4GHz, 5GHzDual band 2.4GHz, 5GHz
Quick chargeQC3.0QC3.0