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HiBy RS8 Hi-Res Flagship Darwin-based R2R Digital Audio Player DAP

HiBy RS8 Hi-Res Flagship Darwin-based R2R Digital Audio Player DAP

Regular price $3,299.00 USD
Regular price $3,299.00 USD Sale price $3,299.00 USD
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The HiBy RS8 is a new HiBy Flagship Darwin-based R2R digital audio player. Based on the Android 12. Utilizing Qualcomm Snapdragon 665, Darwin II audio architecture, R2R DAC, and Class A amplification. Supporting up to DSD1024 PCM1536 DSD1024/PCM1536, MQA 16x unfolding.

HiBy RS8 pre-orders placed from January 5, 2023 will be shipped in mid to late February 2023.


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All our powers combined

The new HiBy Flagship digital audio player

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"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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Pure titanium chassis

Monocoque titanium chassis formed of 6-stage CNC, 17 advanced processes, 19 hours of labour and polishing, yielding a high-quality, tough-wearing exterior with beautiful texture that’s both comfortable and satisfying to hold, befitting a new flagship!

Rotary encoder 

For smooth volume adjustments

Darwin vs Darwin II

The Darwin architecture is HiBy’s in-house developed all new hi-res digital signal processing architecture. In a breakthrough evolution of traditional R2R architecture, the system for the first time includes advanced functions such as linear FIR filter, nonlinear harmonics control, switchable oversampling / NOS, and DSD bypass on portable equipment. The end-to-end flexible architecture is fully configurable, creating endless possibilities for future upgrades and endless evolution.

Evolutionary Darwin audio architecture II

The R2R resistor ladder consists of 12 high speed switches and 184 high precision resistors, double the amount of the last generation, effectively increasing dynamic performance and fidelity at low signal levels. Further addition of a DC offset correction circuit allows for use of a fully DC coupled output stage, further improving impulse response. Sample rates up to 1024x DSD and 1536kHz PCM are supported, surpassing the specifications of many full-size systems in a portable device!

R2R technology

The R2R resistor ladder DAC architecture’s core is the high-precision resistor ladder, consisting of 12 high-speed switches and 184 high-precision resistors. The digital signal is drives, via the high speed electronic switches, the drive voltage to be modulated by the resistor network to obtain an analog voltage waveform corresponding directly to the digital signal, avoiding the high frequency modulation of D-S DACs for a more natural, transparent and emotional presentation.

Resistor ladder linearity compensation

Effectively reduces nonlinearity caused by resistor resistance mismatch in the R2R network; in tandem with the unique harmonics control system of the Darwin architecture, produces a more relaxing, natural listening experience.

NOS/OS mode switch

NOS mode is non-oversampling, responding more immediately and directly to signals, converting the digital signals to analog output directly, bringing a more analog sound signature. It is more suitable for music files / streams of 192kHz sample rate or above.

Oversampling mode easily removes aliasing artifacts via the tried and true combination of oversampling and ultrasonic lowpass filter, yielding superior measured performance; enables all functions of the Darwin architecture, realizes personalized adjustments of sound signature, adapting to different earphones.

Audio dedicated femtosecond crystal oscillators

2x femtosecond precision crystal oscillators, clocked at 45.158MHz and 49.152MHz respectively, dedicated to 44.1x (including DSD) and 48x (including MQA) kHz family of audio format sampling rates, with phase noise as low as 159dBc/Hz @1KHz offset, ensure precision playback of all music formats with zero audible jitter effect.

A new height in parts costs

Handpicked gold-tantalum capacitors utilized to ensure clean power output, higher power supply ripple rejection, lower THD of resulting system; Loaded with 4 Elna SILMIC II silk fibre capacitors for silky highs comparable to tube amplifications! Complete with 47 high capacity tantalum capacitors, 10 Panasonic thin-film POSCAPs, you are getting your money’s worth just in audiophile grade capacitors inside the player!

Class A headphone amplification

Comprised of 2x OPA1652+8x NXP dual bipolar transistors, the class-A amplifier features “zero” zero-crossover distortion and instantaneous transient response; 

Maintaining peak output at all times, the class-A amplifier maintains ideal drive and control characteristics over full-size headphones, high and low impedance IEMs and all sorts of difficult loads and driving easier loads is a snap. The RS8 maintains a composure befitting a modern flagship while playing any complex music passage through any headphone load.

Turbo mode

All in! Full power output! Unleash turbo mode for 25% extra headphone amplifier carrying capacity at the touch of a button! All in for maximum musical performance!

Headphone amplifier voltage supply: default ±6V, Turbo at ±7.5V. By Power = V^2/R, turbo mode yields 56.25% extra power.

*Heat dissipation and battery drain increases significantly when turbo mode is on.

12000mAh power bank

A huge battery, custom designed for the occasion, ensures adequate current supply and battery life for the class A amplifier to come up with the goods for immediate musical transients and last the distance as well: 12 hours through 3.5mm SE and 8 hours through 4.4mm balanced for extended listening!

Independent power supplies

Digital, DAC, preamp, and post-amp circuits are each supplied independently for zero interference.

Headphone amplifier circuit supplied by 2 high-quality DC/DC transformers and 6 high magnetic flux, ultra-low internal resistance, fully shielded high power inductors. The 3.5mm SE and 4.4mm balanced headphone outs are supplied separately.

The ultrasonic lowpass filter is supplied by another DC/DC transformer and 7 LDO regulators, supplying the left and right channels independently.

The R2R ladder is supplied by yet another DC/DC transformer and 2 ultra-low-ripple LDOs supplying each channel independently.

Strong and cool

Pure copper battery case for high heat dissipation efficiency for cool internal temperatures even in the heaviest operation scenarios.

Qualcomm Snapdragon 665

Utilizing an advanced 11nm process, the Snapdragon 665 allows smooth operation of multiple apps at the same time, instant response to music browsing and potential use of any audio DSPs.

8+256 storage configuration

8GB of RAM allows smooth concurrent operation of multiple streaming apps;

256GB of internal storage allows storage of large local music libraries;

Together they allow ready access to any music anywhere!

Open Android 12

Rewritten from the core for simpler operation and more efficient use of the powerful hardware for better responsiveness than ever.

5.5” 1080p display

With Corning Gorilla Glass and oleophobic coating, 1920x1080 resolution, 443ppi, 16:9 aspect ratio.

HiByOS specific functionality

The Direct Transport Architecture (DTA), unique to HiByOS, bypasses sample rate conversion from deep within the system kernel, allowing even 3rd party apps to enjoy bit-perfect output at the original sample rate whether from the headphone outs, line outs, or the USB Audio digital output.

Systemwide remote operation: HiByCast

Breaking all barriers, supporting systemwide operation of all device functionalities from a remote smartphone / tablet, including operation of third party apps!

*HiByCast app required on controlling device. Available on Google Play etc.

MQA 16x unfolding

The strong processing power of the SoC makes an unprecedented 16x unfolding of MQA data possible, reproducing the original master tape from ever smaller source files!

MQA (Master Quality Authenticated) is an award-winning technology that captures and reproduces the sound of the original studio master in a file that’s small enough to stream and download. HiBy is collaborating with MQA to deliver truely original sound quality to listeners.



3.5mm & 4.4mm headphone outs and line outs

3.5mm headphone out and line out, 4.4mm headphone out and line out, all with their own physical ports.

2.4GHz / 5GHz dual band WiFi 

Dual-band WiFi for double the connection speed and stability, supporting ready music streaming.  

Supporting DLNA / AirPlay / WiFi music file transfer.

Bluetooth 5.0

Supporting two-way Bluetooth reception / transmission, supporting all major Bluetooth audio formats such as UAT, LDAC, aptX, aptX HD, AAC, SBC etc.

PD2.0 quick charge

Supporting charge rates of up to 20W for quick battery replenishment.

What’s in the box

Customized suitcase made from full-grain leather*1

HiBy RS8*1 + exclusive titanium nameplate*1

Handwritten letter by CEO*1 + manual/warranty card*1

Type C to RCA coaxial cable*1 + USB Type C to type C cable*1

Full-grain genuine leather case*1

 Drawstring storage bag for customized suitcase*1

Audio specifications

Table header 03.5mm PO(AB)3.5mm PO(A)4.4mm PO(AB)4.4mm PO(A)3.5mm LO4.4mm LO
Maximum output voltage (Vrms)3Vrms3Vrms5Vrms5Vrms2Vrms4Vrms
Maximum output power (mW)280mW280mW780mW780mW//
Output power (THD<1%)280mW280mW780mW780mW//
Nominal THD (%)0.0030.0030.0030.0030.0030.003
Noise floor (uV)5uV5uV8uV8uV3uV6uV
SNR (dB)114dB114dB115dB115dB116dB115dB
Dynamic range (dB)106dB106dB106dB106dB//
Channel separation (dB)75dB75dB93dB93dB101dB104dB
Frequency response (-3dB)20Hz-90KHz20Hz-90KHz20Hz-90KHz20Hz-90KHz20Hz-90KHz20Hz-90KHz


ModelHiBy RS8
Operating systemAndroid 12
SoC modelSnapdragon 665
DAC2nd gen Darwin architecture
WiFi2.4GHz and 5GHz dual-band
BluetoothBluetooth 5.0
Display size5.5 inches
no. of colours16.8 million
LCD technologyIPS
Pixel density400 ppi
Removable Micro SD cardUp to 2TB
Chassis colorSilver
Chassis compositionPure titanium
Dimensions143*82*22 mm
Unit weight584g
Power input12V⎓1.8A or 5V⎓0.5A 
Battery size12000mAh/3.8V
Charge time<5h(0%-100%)
Firmware updatesOver-the-air online updates
Font sizeChangeable
APP Third party appsFully supported

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