HiBy R6 Pro II Digital Audio Player

The R6 Pro II sits between the R6 III and R6 Pro Max, and the 2025 refresh changes its DAC section entirely rather than just tweaking the tuning. HiBy dropped the original AK4191EQ/AK4499EX pairing for dual Cirrus Logic CS4308P chips, giving this generation a noticeably different, more contrasted character than the DAP it replaces.

Type and Technology

• Dual Cirrus Logic CS4308P flagship DAC chips (replacing the previous generation's AK4191EQ/dual AK4499EX)
• Qualcomm Snapdragon 665 SOC, open Android 12 with global SRC bypass
• Switchable Class A / AB amplification, up to 632mW balanced output
• Discrete power supplies for the DAC, I/V stage, low-pass filter, and amplification sections
• Dual NDK femtosecond crystal oscillators (45.1584MHz, 49.152MHz) positioned near the DACs for jitter control
• 6GB RAM, 128GB internal storage
• Native DSD512, PCM 32bit/768kHz, MQA 16x unfolding

Sound Character

Reviewers describe the 2025 DAC swap as a real shift from the original R6 Pro II: more contrast, a more vivid presentation, and improved resolution and technical performance over the AKM based predecessor. It's positioned as an alternative sound profile rather than a straight upgrade, so if you specifically liked the old AK4499EX tuning, this is a different flavor, not just more of the same.

Build and Comfort

• Distinctive wave pattern back panel with embossed detailing, carried over from the Pro II design language
• 147.45 x 75.2 x 15mm
• Black only; the Blue colorway from an earlier run has been discontinued

Best For

• Listeners who want flagship-adjacent DAC hardware in a sub-$1,000 player
• Anyone upgrading from the original R6 Pro II who wants a different tonal balance, not just more power
• High end IEM owners who prioritize control and resolution over sheer output

What's in the Box

R6 Pro II player, PD-compatible USB-C cable, wall charger, pleather case, and documentation.

Specifications