HiBy FC4 USB DAC Amp — DSD512 PCM768 MQA, 3.5mm & 4.4mm

Designed to lift mobile and desktop audio beyond standard device outputs, the FC4 packs dual high-performance DAC chips, low-jitter clocking, and onboard equalization into a lightweight housing. It delivers studio-grade file support and flexible outputs so headphones, earphones, or line-level systems can sound clearer, more dynamic, and better timed than they do through typical phone or laptop jacks.

How does the FC4 improve sound quality for high-resolution files?

The FC4 uses two dedicated DAC chips in a differential layout and femtosecond-class clock references to reduce jitter and preserve transient detail. This combination increases dynamic range and refines instrument separation, revealing nuance in high-resolution tracks.

• Dual CS43131 DAC architecture for accurate stereo decoding
• Two low-phase-noise oscillators (45.1584 & 49.152MHz) for stable timing
• Native support for DSD512 and PCM up to 768kHz/32-bit
• MQA 8x unfolding for studio-origin playback

What playback options and outputs are available for headphones and systems?

The unit provides both a 3.5mm single-ended jack and a 4.4mm balanced output to drive a wide range of headphones with improved headroom and lower noise. It also works as a line-out to feed desktop amplifiers, car audio front-ends, or powered speakers when needed.

• 3.5mm SE for common headphones and earphones
• 4.4mm balanced for higher-power, lower-noise operation
• UAC 1.0/2.0 compatibility for consoles and older hosts
• Operates with phones, tablets, PCs, and gaming systems

How customizable is the FC4’s sound and user interface?

HiBy equips the FC4 with eight factory EQ presets tuned for multiple genres plus a parametric EQ mode for precise user adjustments. The compact color OLED shows playback and device status at a glance while simple menus let you switch modes quickly.

• Eight HiBy-crafted preset EQ curves for common genres
• Full parametric EQ (PEQ) for tailored frequency shaping
• 1.1-inch color OLED displays sample rate, format, and settings
• Minimalist menu design for fast on-device control

Will the FC4 work with my console, phone, or computer?

The FC4 supports UAC 1.0 and 2.0, ensuring broad compatibility with modern computers, mobile devices (with appropriate adapters), and gaming consoles such as PS4/PS5 and the Nintendo Switch. Legacy hosts that require UAC 1.0 are supported too, making the dongle a versatile companion for many sources.

• UAC 1.0/2.0 ensures compatibility across platforms
• Works with modern phones via OTG/adapters and with PCs natively
• Console-ready for PS4/PS5 and Switch audio upgrades
• Lightweight 21 g design aids portability and travel use

Who is this for? The HiBy FC4 suits listeners who want true hi-res decoding from mobile or desktop sources without carrying a full-size rig. Audiophiles who value MQA and DSD playback, gamers seeking cleaner headphone output, and commuters who want a compact, feature-rich DAC/amp with customizable EQ will benefit most from this pocket-sized device.