The HiBy FC4 is the firm's super compact portable amplifier/DAC, with an output power of 340mW and dual DAC. It is ideal to use with your smartphone and obtain maximum detail in your favorite subjects.

In addition, the professional audio architecture, 3.5mm SE and 4.4mm balanced output ports, 16X MQA, native PCM768/DSD256 decoding complete the perfect listening experience. 

The HiBy FC4s contain circuitry on par with full-scale professional HiBy digital audio players, designed solely for high-resolution lossless music, reproducing the original music in every detail, including all of its energy and presence.

Equipped with dual 45.158 MHz and 49.152 MHz dedicated audio crystal oscillators, to effectively reduce jitter, providing the entire audio system with a high-precision, low-jitter clock source.

Powered by a highly integrated high-efficiency 28nm USB receiver chip, with the built-in 416M dedicated audio DSPto achieve the best balance between high performance and long runtime, effectively reducing the battery consumption of the smartphone.

The figures of340mW+340mW at @32Ωare almost unheard of for a USB dongle with the characteristics of the HiBy FC4. It is capable of driving high impedance headphones that require maximum demands.

At the same time, the FC4 stands out for its high SNR, low absolute noise level and low THD, all at the forefront of products in this class, making it a faithful interpretation of great music at your fingertips.

The HiBy FC4 includes MQA technology, allowing you to play MQA audio files and streams by a factor of 16x, delivering the sound of the original master recording.

Equipped with2 of ESS Technologies' renowned ES9219 DAC chips, configured to output to each channel independently, its strong decoding power does not miss a single musical detail.

It also supports decoding up to PCM768kHz/32bit, DSD256 (native), bordering professional HiFi in decoding specifications and supporting all lossless streaming formats.

The HiBy FC4 includes balanced 3.5mm SE and 4.4mm ports to ensure compatibility with all possible headphones.

By seamlessly integrating with the HiBy Music app's USB exclusive mode, you rely on your smartphone's bitperfect audio output to the FC4, fully unleashing the hardware decoding/amplification power of the FC4. 

Meanwhile, the HiBy Music app is a professional app for high-resolution audio playback on Android and iOS, with over 3 million users worldwide, and its exclusive USB mode coupled with external USB DAC/headphone amplifiers receives widespread praise from hi-fi fans.

The HiBy FC4 supports use on Android/iOS/Mac/Windows as a USB dongle/PC external sound card. In addition, it is certified with Hi-Res Audio. 

The aesthetics of the FC4 are elegant. It is constructed with an all-metal body in Bauhaus design language, finished in black with luxurious gold trim.

The 30-step physical hardware volume button controls the hardware volume controller for better adaptability and lossless volume control.

• USB Type A to Type C Cable
• Type C to Type C Cable
• Product packaging
• User manual/warranty/certificate

• Model: FC4
• Dimensions: 65.3 x 22.1 x 11.9mm
• Weight: 21.7 grams
• Chipset: ES9219 * 2
• Buttons: Volume up/down
• Supported formats: PCM up to 768kHz/32bit, up to native DSD256
• RGB indicator light: Status indicator
• USB port: Type-C
• Headphone output: TRRS headphones with CTIA specifications and 3.5mm TRS
• Balanced headphone output: 4.4mm balanced

• Output level: 1.9 Vrms (32 Ω)
• Output power: 110mW (32Ω)
• THD+N: 0.0008% (32Ω)
• Noise: 1.7 μVrms (32 Ω)
• SNR: 120dB (32Ω)
• Dynamic range: 120dB (32Ω)
• Crosstalk rejection: 72dB (32Ω)
• Frequency response (-3dB): 20-90Khz (32Ω)

• Output level: 3.3 Vrms (32 Ω)
• Output power: 340mW (32Ω)
• THD+N: 0.0006% (32Ω)
• Noise: 2.2 μVrms (32 Ω)
• SNR: 123dB (32Ω)
• Dynamic range: 123dB (32Ω)
• Crosstalk rejection: 98dB (32Ω)
• Frequency response: 20-90Khz (32Ω)
• Frequency response (-3dB): 20-90Khz (32Ω)