HiBy RS2

Out of stock
Digital Audio Player

PureAudio System + Darwin Architecture, taste the raw emotions of pure music!

  • An output stage designed completely around R2R
  • NOS / OS mode switch
  • Precision dual crystal oscillators, FPGA clock regeneration system
  • MQA 8x unfolding
  • Uncharging mode--Independent battery operation as USB DAC
Pre-order period: In stock and ready to ship.

This is a rough estimation. It may change without prior notice.

Style :
Ships from the United Kingdom

All our products ship from the UK. UK prices include local VAT. International orders will incur the destination's local taxes and duty charges.

Terms & conditions


Elise Audio has a standard 14-day return / exchange policy for electronic products (DAC/DAP):

  • Must be returned in like-new factory condition 
  • Must include all original packaging and accessories

Please note that the return shipping cost is to be paid by the customer.

Returning products that raise hygiene concerns - Products that have contact with the ear, nose or throat can only be returned for a full refund if sent back sealed and in unused condition. This applies all in-ear monitors.

If you are dissatisfied with your product please get in touch with us. We may be able to offer credit for another purchase (subject to inspection of the returned product) or to purchase the product back as used if we can dispose of the item as B stock. Please note the products would need to be inspected before any final offers are made but, as a guidance only, a 20% restocking fee will be applied on most in-ear monitors.

Custom made products - Products that have been custom made to the customer's specification cannot be returned for a refund or credit under this policy.

Read our full Returns, Warranty & Terms of service by clicking here


We offer a range of delivery options to suit your purchasing needs. The options are presented to you at the checkout, in an easy to understand way.

Most orders for In-Stock items are shipped within 1 to 3 business days (Monday to Friday, except bank holidays), subject to stock availability and security checks. Please ensure you provide a valid phone number for us to contact you should verification of your identity be required.

For More information about our Shipping Policy please click here

  • Royal Mail Tracked 24 and 48

    Providing a fully tracked service within the UK, with online tracking and customer and delivery notifications, this is the new normal in standard services.

  • Royal Mail Special Delivery - Next Business Day

Products purchased from Elise Audio are supplied with a manufacturer warranty that is specified on the product page on our website. Most products come with a 1Y manufacturer warranty (or 3 months for B-grade, open box, refurbished, ex-demo and second hand items).

The manufacturer's warranties are limited to physical defects in the materials, parts and workmanship used in making the product. Abnormal conditions, deliberate abuse and damage due to accidents, operator's error, or unauthorized service attempts are excluded from any warranty claims.

Faulty goods returned under the manufacturers warranty are to be returned to Elise Audio at the cost of the customer. Elise Audio will cover the cost of shipping the repaired or replacement product back to the customer.


An output stage designed completely around R2R

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.

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

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.

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.

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.

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.

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.

Format support

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

technical specifications
90.3 *64.8*18.8 mm
Approx. 158g
2.45” 480*360
Operating System
HiByOS PureAudio version
Darwin Architecture
Dual Micro SD card up to 2TB
USB 2.0
Audio format support
PCM384 / DSD256
Chassis material
Aluminium alloy
Crosstalk rejection
118dB using 3.5mm PO @32Ω, 117dB using 4.4mm PO @32Ω
Output impedance
0.47Ω using 3.5mm PO @32Ω, 0.94Ω using 4.4mm PO @32Ω
Output voltage
2Vrms using 3.5mm PO @32Ω, 3.2Vrms using 4.4mm PO @32Ω
Output Power
125mW using 3.5mm PO @32Ω, 320mW using 4.4mm PO @32Ω
Charging time
Approx. 3h (0%-100%)
Customer Reviews
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