1. はじめに
The HiBy FC4 is a portable USB DAC (Digital-to-Analog Converter) and headphone amplifier designed to enhance your audio experience across various devices. It features dual DAC chips, independent crystal oscillators, and supports high-resolution audio formats including MQA 16X, PCM768K, and DSD256. With both 3.5mm single-ended and 4.4mm balanced headphone outputs, it offers versatility for different headphone types.

Image: The HiBy FC4 device shown alongside its product packaging.
2.セットアップガイド
Follow these steps to set up your HiBy FC4 with your preferred device.
2.1 デバイスへの接続
The FC4 is designed for plug-and-play operation with most modern operating systems.
- Android/iOS: Connect the FC4 to your smartphone or tablet using the appropriate USB-C to USB-C cable (for Android) or a Lightning to Type-C OTG cable (for iOS, sold separately). No drivers are typically required.
- Mac/Windows 10 and up: Connect the FC4 to your computer's USB port using the provided USB-C to USB-C cable. The device will be recognized automatically, and no additional drivers are needed.
- Windows (below 10): For Windows versions older than Windows 10, you may need to download and install specific drivers from the official HiBy website. Refer to the support section of the HiBy webドライバーダウンロードのサイト。

Image: The HiBy FC4 demonstrating connectivity with various platforms including Android, iOS, and Mac/Windows devices.
2.2最初の使用
- Connect your headphones to either the 3.5mm single-ended or 4.4mm balanced output port on the FC4.
- Connect the FC4 to your source device (smartphone, tablet, or computer).
- Ensure your source device's volume is set to a low level before playing audio.
- Begin playing audio from your source device. Adjust the volume using the FC4's physical volume buttons.
Video: An official product video demonstrating the features and usage of the HiBy FC4 Portable DAC Amplifier。
3. 操作
Understanding the features and controls of your HiBy FC4 will help you maximize its performance.
3.1 ヘッドフォン出力
The FC4 provides two headphone output options:
- 3.5mmシングルエンド(SE): Standard headphone jack for most common headphones.
- 4.4mmバランス: Offers improved sound separation and power for compatible balanced headphones.

画像: 詳細な view of the HiBy FC4's top, highlighting the 3.5mm single-ended and 4.4mm balanced headphone output jacks.
3.2 ボリュームコントロール
The FC4 features a 30-step physical hardware volume control for precise audio level adjustments. Use the '+' and '-' buttons on the side of the device to increase or decrease the volume.

Image: The side of the HiBy FC4, illustrating the physical volume control buttons.
3.3 RGB Indicator Light
The FC4 includes an RGB indicator light that displays different colors to indicate the current audio sample rate being processed:
- 青: Standard Definition (SD) audio.
- 緑: High-Resolution (Hi-Res) audio (e.g., PCM up to 48kHz).
- 黄: High-Resolution (Hi-Res) audio (e.g., PCM above 48kHz).
- 赤紫色: MQA audio.

Image: The HiBy FC4 connected to a smartphone, with its RGB indicator light illuminated, signifying the current audio sampルレート。
3.4 MQA 16X Unfolding
The HiBy FC4 supports MQA (Master Quality Authenticated) full decoding technology, allowing it to unfold MQA audio files and streams up to 16 times, delivering the full quality of the original master recording.

Image: The HiBy FC4 highlighting its MQA 16X unfolding capability.
3.5 Hi-Res Audio Support
The FC4 is capable of decoding high-resolution audio formats, including PCM up to 768kHz/32bit and native DSD256, ensuring a detailed and accurate sound reproduction.

Image: The HiBy FC4 displaying its Hi-Res Audio certification and support for PCM768K and DSD256.
4. メンテナンス
Proper care and maintenance will ensure the longevity and optimal performance of your HiBy FC4.
4.1 クリーニング
- 柔らかく、乾いた、糸くずの出ない布でデバイスを拭いてください。
- 液体クリーナー、エアゾール、溶剤は、仕上げや内部コンポーネントを損傷する恐れがあるため、使用しないでください。
- Keep the ports free of dust and debris. Use a soft brush or compressed air if necessary, ensuring the device is powered off.
4.2 ストレージ
- Store the FC4 in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid storing in environments with high humidity or excessive dust.
- When not in use, disconnect the FC4 from all devices and store it safely to prevent physical damage.
5。 トラブルシューティング
If you encounter issues with your HiBy FC4, refer to the following common problems and solutions.
- サウンド出力なし:
- Ensure the FC4 is securely connected to both the source device and headphones.
- Check the volume levels on both the FC4 and your source device.
- Verify that the correct audio output device (HiBy FC4) is selected in your source device's sound settings.
- Test with different headphones and cables to rule out faulty accessories.
- デバイスが認識されません:
- Ensure the USB cable is fully inserted and not damaged.
- Try connecting to a different USB port on your computer or a different source device.
- For Windows versions below 10, confirm that the necessary drivers are installed from the HiBy webサイト。
- ソースデバイスを再起動します。
- 断続的な音声/歪み:
- 接続が緩んでいないか確認してください。
- オーディオを確保する file or streaming quality is not corrupted.
- Avoid using excessively long or low-quality USB cables.
- 高レベルで歪みが発生する場合は、音量を下げてください。
- Rapid Battery Drain on Source Device:
- The FC4 draws power from the connected device. High-power headphones or continuous high-volume playback may increase power consumption.
- This is normal operation for a bus-powered DAC/amp.
これらの解決策を試しても問題が解決しない場合は、HiBy カスタマー サポートに連絡してサポートを受けてください。
6. 仕様
Key technical specifications for the HiBy FC4 Portable DAC Headphone Amplifier:
| 特徴 | 仕様 |
|---|---|
| モデル番号 | FC4 |
| DACチップ | 2 x ES9219 |
| PCMサポート | 最大768kHz/32ビット |
| DSDサポート | Up to DSD256 (Native) |
| MQA サポート | MQA 16X Unfolding |
| ヘッドフォン出力 | 3.5mmシングルエンド、4.4mmバランス |
| Driving Power (32Ω) | 340mW+340mW |
| 信号対雑音比(SNR) | >123デシベル |
| 全高調波歪み+ノイズ(THD + N) | <0.0006% |
| ハードウェアインターフェイス | USB-C |
| 対応デバイス | Smartphone, Tablet, Personal Computer, Laptop |
| サポートされているプラットフォーム | Android, iOS, Mac, Windows 10 and up |
| 製品寸法 | 2.57 x 0.87 x 0.47 インチ (6.53 x 2.21 x 1.19 cm) |
| アイテム重量 | 2.82オンス(80グラム) |

Image: The HiBy FC4 highlighting its impressive audio performance metrics, including SNR and THD+N.
7.保証とサポート
HiBy products are manufactured to high quality standards. For warranty information, please refer to the warranty card included with your product or visit the official HiBy webサイトでご確認ください。保証請求に備えて購入証明書を保管してください。
7.1 カスタマーサポート
If you have any questions, require technical assistance, or need to report an issue, please contact HiBy customer support through their official webサイトまたは製品パッケージに記載されている連絡先情報を参照してください。
正式 Webサイト: www.hiby.com