FiiO K5 Pro デスクトップ DAC とヘッドフォン Amplifierユーザーマニュアル

1. はじめに

The FiiO K5 Pro is a high-performance desktop Digital-to-Analog Converter (DAC) and headphone amplifier designed to elevate your audio experience. It features advanced decoding capabilities and a robust ampリフィケーションtage, making it suitable for a wide range of headphones and audio setups. This manual provides detailed instructions for setting up, operating, and maintaining your K5 Pro.

Figure 1: FiiO K5 Pro Desktop DAC and Headphone Ampリファイアー

2 製品の特徴

• High-Performance DAC & USB Decoding: Equipped with an ES9038PRO DAC chip for 32-bit processing and an XUF208 USB decoding chip, supporting up to 768kHz and DSD512 inputs.
• 多彩な入力: Supports Coaxial, Optical, and RCA line-in inputs. Optical and Coaxial inputs support up to 192kHz.
• 複数の出力: Features a 6.35mm (1/4 inch) headphone output and RCA line-out outputs. The RCA line-out signal is adjustable up to 2Vrms, allowing connection to active speakers or external amplifiers。
• パワフルなヘッドフォン Amplification： Delivers up to 1.5W of total power output into a 32Ω load, and up to 20Vpp at 300Ω, capable of driving both low and high impedance headphones.
• 正確なボリュームコントロール: ADC volume adjustment ensures smooth, fine-increment volume changes without undesirable noise or channel imbalances, accommodating various headphone sensitivities.

3. セットアップ手順

3.1開梱と配置

Carefully remove the FiiO K5 Pro from its packaging. Place the unit on a stable, flat surface away from direct sunlight, heat sources, and excessive moisture. Ensure adequate ventilation around the device.

3.2 電源の接続

1. Connect the provided power adapter to the 'POWER IN DC 15V' port on the rear panel of the K5 Pro.
2. 電源アダプタを適切な壁のコンセントに差し込みます。

3.3入力接続

The K5 Pro offers multiple input options:

• USB入力： Connect your computer or compatible device using a USB cable to the 'USB IN' port for high-resolution audio playback.
• 同軸： Use a coaxial cable to connect to digital audio sources.
• オプティカルイン： Use an optical (TOSLINK) cable to connect to digital audio sources.
• ライン入力（RCA）： Connect analog audio sources using RCA cables to the 'LINE IN' ports.

Figure 2: Rear panel showing various input and output connections.

3.4出力接続

• Headphone Out (6.35mm): Plug your headphones into the 6.35mm jack on the front panel. A 3.5mm adapter may be used for headphones with smaller plugs.
• ライン出力（RCA）： Connect to active speakers or another ampRCAケーブルを使用したリファイヤ。

4. 操作手順

4.1 電源のオン/オフと音量調節

The large knob on the front panel serves as both the power switch and volume control. Rotate the knob clockwise until it clicks to power on the device. Continue rotating clockwise to increase volume, and counter-clockwise to decrease volume. Rotate counter-clockwise until it clicks to power off.

4.2入力の選択

Use the 'INPUT' toggle switch on the front panel to select your desired audio source. The switch positions correspond to different inputs:

• 'U' (USB): For USB input.
• 'L' (Line In): For RCA Line In.
• 'S' (SPDIF): For Coaxial and Optical inputs.

4.3 ゲイン選択

The 'GAIN' toggle switch allows you to adjust the amplification level to match your headphones' impedance and sensitivity. There are three gain levels:

• 低ゲイン
• 中ゲイン
• 高ゲイン

Select a lower gain for sensitive headphones and a higher gain for demanding, high-impedance headphones.

Figure 3: Front panel showing volume knob, input, and gain switches.

4.4 RGB Light Indicator

The RGB light around the volume knob indicates the current sample rate of the audio being played:

• 青： 48kHz以下
• 緑： 48kHz以上
• 赤： DSDフォーマット

5. メンテナンス

To ensure the longevity and optimal performance of your FiiO K5 Pro, follow these maintenance guidelines:

• 柔らかく乾いた布で拭いて、デバイスを清潔に保ちましょう。刺激の強い化学薬品や研磨剤の使用は避けてください。
• 極端な温度、湿度、直射日光にさらさないでください。
• 過熱を防ぐために適切な換気を確保してください。
• 落としたり、強い衝撃を与えないでください。

6。 トラブルシューティング

If you encounter issues with your FiiO K5 Pro, refer to the following common troubleshooting steps:

• 音が出ない:
  • Check all cable connections (power, input, headphones/speakers).
  • Ensure the K5 Pro is powered on and the volume is not at minimum.
  • Verify the correct input source is selected using the 'INPUT' switch.
  • Confirm that your computer's audio output is set to the FiiO K5 Pro.
• 歪んだ音:
  • Reduce the volume on both the K5 Pro and your source device.
  • Adjust the 'GAIN' switch to a lower setting if your headphones are very sensitive.
  • 音源を確認する file 破損したり品質が低下したりしていないこと。
• 断続的な音声:
  • ケーブル接続が緩んでいないか確認してください。
  • Try a different input cable or port.
  • Ensure no other devices are interfering with the signal (e.g., electromagnetic interference).

If problems persist, consult the FiiO official support resources or contact customer service.

7. 仕様

8. 保証とサポート

The FiiO K5 Pro comes with a standard manufacturer's warranty. For detailed warranty information, please refer to the warranty card included with your product or visit the official FiiO website. For technical support, troubleshooting assistance beyond this manual, or service inquiries, please contact FiiO customer support through their official channels.

Always ensure you are using official FiiO accessories and following recommended guidelines to maintain warranty validity.