HiBy FC4 Portable USB DAC Amp MQA DSD512 4.4mm

The HiBy FC4 is a featherweight portable USB DAC and headphone amplifier that delivers studio-level decoding (DSD512, PCM768, MQA) with a 1.1" OLED and dual balanced outputs for detailed, low-jitter listening anywhere.

The HiBy FC4 combines advanced DAC hardware with compact, travel-ready design to upgrade phone, laptop, or console audio. Built around dual CS43131 DAC chips and femtosecond-grade audio clocks, the FC4 focuses on accurate timing and low noise to reveal clearer dynamics and finer micro detail. Its small footprint, color OLED, and multiple output options make it a flexible solution for audiophiles who want high-resolution playback without a bulky rig.

How does the FC4 improve sound quality from phones and computers?

The FC4 replaces lower-quality onboard DACs with high-performance differential decoding and precision clocking to reduce jitter and noise. That results in cleaner transients, wider dynamic range, and improved stereo imaging so recordings sound more natural and textured.

• Dual CS43131 DACs for precise differential decoding
• Femtosecond-grade oscillators to minimize timing errors
• Supports DSD512 and PCM 768kHz/32-bit for ultra-high resolution playback
• MQA 8x unfolding for near-studio presentation of compatible files

Which headphones and devices will work with the FC4?

The FC4 supports standard USB audio classes (UAC 1.0/2.0), making it compatible with most smartphones, Windows/Mac computers, and gaming consoles like PS4/PS5 and Nintendo Switch. It offers both 3.5mm single-ended and 4.4mm balanced outputs to match a wide range of headphones and line-input needs.

• 3.5mm SE output for compact headphones and earphones
• 4.4mm balanced output for higher-power and balanced headphones
• UAC 1.0/2.0 compatibility for legacy and modern devices
• Line-out capable for connecting to home or car audio systems

What playback and tuning options does the FC4 provide?

Out of the box, the FC4 supports high-resolution formats including DSD512 and PCM up to 768kHz, plus MQA unfolding. For tonal control, it includes eight HiBy-tuned EQ presets and a fully parametric EQ (PEQ) so you can match sound to headphones or music genres precisely.

• Native DSD512 and PCM 768kHz/32-bit decoding
• MQA 8x unfolding for studio-quality streamed files
• Eight factory EQ presets covering rock, pop, classical and more
• Full user PEQ for detailed frequency shaping and compensation

How portable and user-friendly is the FC4 for everyday use?

The FC4 weighs just 21 grams and blends aluminum alloy with translucent PC for a futuristic, durable look. A 1.1-inch color OLED shows playback and settings at a glance while a minimal menu keeps operation straightforward for quick adjustments on the go.

• Ultra-light 21 g chassis for pocketable portability
• 1.1" color OLED displays status and settings clearly
• Minimal menu design for fast, intuitive control
• Aluminum and translucent PC housing for a modern, durable finish

Who is this for: The HiBy FC4 targets listeners who want a noticeable step up from built-in audio—mobile audiophiles, gamers using consoles or handhelds, and desktop listeners seeking a compact DAC/Amp that supports the highest-resolution files. If you value accurate timing, flexible outputs, and tunable sound in a pocket-sized unit, the FC4 is built to deliver.