The Darwin audio architecture is HiBy’s 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.
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.
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, and high fidelity; also adaptable to the characteristics of different earphones, guaranteeing the suitability of the RS2 to all sorts of earphones.
Dual precision crystal oscillators at 45.185MHz / 49.152MHz effectively reduce phase noise and jitter to -140dBc/Hz@1kHz offset.
Utilizing current mode amplification, the output stage amplifies current via an 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 conjunction 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.
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.
With slots for 2 micro SD cards, supports storage of up to 4TB and simultaneous usage of the two cards.
Up to 10 hours of continuous playtime. Standby for up to 40 days.
|Operating system||HiByOS PureAudio version|
|Audio format support||PCM384 / DSD256|
|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|
|Charging time||Approx. 3h (0%-100%)|
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|
|Maximum output power||125mW||320mW||/|
|Rated output power (THD <1%)||125mW||225mW||/|