
HiBy R6 Pro II
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The HiBy R6 Pro II is a mid-tier Android digital audio player built around AKM's flagship DAC pair, the AK4191EQ plus dual AK4499EX, run in current-output mode with digital conversion and analog rendering kept separate. Its four-section independent power supply feeds the digital, decoding, preamp and output stages from their own rails. Against rivals in its class it leans on the dual-DAC architecture and a large screen rather than on exotic output hardware. It suits listeners who want a standalone streaming player with wired IEMs or easy-to-drive headphones, not power-hungry planar cans.
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The HiBy R6 Pro II is a digital audio player and the second generation of the HiBy R6 Pro. It has a larger screen, a new look and longer battery life than the original. It uses a dual AKM DAC design with four independent power supply sections, for the digital, decoding, preamp and output stages.
It has two amplification circuits that can be switched on the touch screen. Class A is driven by 2 OPA1652 chips and 8 NXP bipolar transistors. It is meant for full-size headphones and complex loads such as multi-hybrid IEMs. Class AB gives longer play time and lower heat, and is sufficient for most IEMs. Two femtosecond-precision NDK crystal oscillators, at 45.1584 MHz and 49.152 MHz, keep phase noise and jitter low.
The player runs HiByOS, which is based on Android 12. It offers fine volume control, system-wide bit-perfect audio, including for third-party apps, and removal of unwanted sound effects. HiByCast lets a smartphone or tablet remotely control all of the player's functions, including opening and browsing third-party apps.




