HiBy RS2 - HiFi Audio Player Medium-end DAP with Darwin Architecture

Regular price $479.00 Sale price $479.00 Regular price $479.00
Color Black
Version Standard
In stock
PureAudio System + Darwin Architecture, taste the raw emotions of pure music! Dual MicroSD card slots and up to 4TB storage supported, all your music ever in the palm of your hand. Retro design language are melded into the tough bold lines of the R family. 

Best Match : 20$ Discount on RS2 + Lasya

Detailed Parameters

Seek Splendid Sound

PureAudio player with Darwin audio architecture

Hiby RS2 Audio Componentry, Seek Splendid Sound
Hiby RS2 Audio Componentry Seek Splendid Sound 2

Purely audiophile's Music Player

Purely audiophile

Running on the PureAudio HiByOS, the RS2 also enjoys targeted optimization of system level audio processing, providing a clean, pure audio playback pathway, ensuring a purely audiophile music experience.

Old-school audiophile

Retro design language are melded into the tough bold lines of the R family. The volume knob, being the element you most often come in contact with, is a diamond-cut, artisan-grade masterpiece. Functionality is not sacrificed, the touchscreen supports touch controls and double-tap-to-wake

Old-school audiophile's Music Player
Old-school audiophile's Music Player 2

Intuitively audiophile

All-new user interface tailored to the RS2. Simplified menu structure is more intuitive and user-friendly than ever. Green & gold theme--firmly luxurious.

Evolutionary audiophile

The Darwin audio architecture is our in-house developed all new hi-res audio processing architecture; improving greatly upon traditional R2R technology, it incorporates a host of studio-grade functionality such as linearity compensation for the R2R network, adjustable FIR filter, harmonic controller, NOS/OS switch, etc. in a highly portable device. The flexible architecture is fully adjustable in-house, yielding infinite possibilities for evolution of this model and the next.

An output stage designed completely around R2R

An output stage designed completely around R2R

Fully musical, realistic, natural and analogue, highly energetic when called for, fully immersive for the listener.

NOS / OS mode switch

NOS mode is non-oversampling, yielding raw response to signal changes; OS mode is adapted to the various additional functionalities of the Darwin architecture, realizing personalized adjustments to the sound qualities to adapt to different earphones and different tastes.

NOS / OS mode switch
256-tap adjustable FIR filter

256-tap adjustable FIR filter

The Darwin architecture is capable of up to 16x oversampling, with a variety of AA filters suited to various design goals, e.g. phase linearity, high fidelity; also adaptable to the characteristics of different earphones, guaranteeing the suitability of the RS2 to all sorts of earphones.

Precision dual crystal oscillators, FPGA clock regeneration system

Dual precision crystal oscillators at 45.185MHz / 49.152MHz effectively reduce phase noise and jitter to -140dBc/Hz@1kHz offset.

Precision dual crystal oscillators, FPGA clock regeneration system
Luxurious output stage circuitry

Luxurious output stage circuitry

Utilizing current mode amplification, the output stage amplifies current via a OPA1652 and an LPF consisting of 2x OPA1612, offering high and clean input voltage and current to the output stage for exemplary transient and dynamic response. In conjuction with 2x flagship class OPA1622 amplifier chips, 4 independent channels of current mode headphone amplification, and the professional digital volume controller NJW1195A, the circuit guarantees maximal fidelity of the output to the input, and maximal control over the headphone drivers.

MQA 8x unfolding

MQA 8x unfolding offers reproduction of the original performance on par with the master tapes, transporting you to the same room with the artists!

MQA (Master Quality Authenticated) is an award-winning audio technology that enables music fans to stream the original master recording into their home in the highest possible quality. The MQA file is fully authenticated, backward compatible, and small enough to stream, so you can play MQA on any compatible device. Wherever there is audio, MQA delivers the best sound.

MQA 8x unfolding
Format support

Format support

Supporting all the main music encoding formats, supporting PCM up to 384kHz / DSD hardware decoded at up to DSD256.

USB DAC / coaxial digital / Line Out all supported

Inheriting the high configurability of other HiByOS devices, the RS2 may be used as a USB DAC (e.g. playing computer / smartphone audio) but also output to other USB DACs (e.g. outputting audio from the RS2 to other USB DACs), and even output its audio as coaxial digital / line out signals.

USB DAC / coaxial digital / Line Out all supported
Dual card storage

Dual card storage

With slots for *2* micro SD cards, supports storage of up to 4TB and simultaneous usage of the two cards.

Long play time

Up to 10 hours continuous play time. Standby for up to 40 days.

Long play time
Uncharging mode--Independent battery operation as USB DAC

Uncharging mode--Independent battery operation as USB DAC

Press button to toggle charging in USB DAC mode--uncharging mode reduces battery consumption on smartphone and isolates device from external power supply noise.

At a glance

Brushed aluminium alloy outer shell

Brushed aluminium alloy outer shell

Slim and light

Slim and light

Dual IEM headphone ports

Dual headphone ports


Model HiBy RS2
Operating system HiByOS PureAudio version
CPU X1000E
DAC Darwin Architecture
Audio format support PCM384 / DSD256
Display size 2.45”
Touchscreen Yes
Resolution 480*360
Storage - card slot 1 Micro SD card up to 2TB
Storage - card slot 2 Micro SD card up to 2TB
Chassis material Aluminium alloy
Dimensions 90.3 *64.8*18.8 mm
Weight Approx. 158g
Charging 5V⎓1.5A
Battery size 3500mAh
Charging time Approx. 3h (0%-100%)
Audio specifications
HiBy RS2 audio specifications (as tested within the 20Hz-20kHz range)
Output port 3.5mm PO @32Ω 4.4mm PO @32Ω 3.5mm LO @10K 
Frequency response +/-1dB 20Hz-20kHz 20Hz-20kHz 20Hz-20kHz
Output voltage 2Vrms 3.2Vrms 2Vrms
Maximum output power 125mW 320mW /
Rated output power (THD <1%) 125mW 225mW /
Crosstalk rejection 63dB 82dB 82dB
SNR 118dB 117dB 116dB
Dynamic Range 82 82 /
THD+Noise 0.006% 0.006% 0.006%
Output impedance 0.47Ω 0.94Ω 10K

What’s in the box

Package box, Type C to RCA digital coaxial cable, USB Type C cable, Darwin brooch, RS2, RS2 green leather case

What’s in the box