1. はじめに
The Douk Audio Nobsound NS-02E is a compact and versatile vacuum tube headphone amplifier designed to enhance your audio experience. It features an anodized aluminum chassis and a replaceable vacuum tube with blue illumination. This amplifier delivers a soft and warm sound while maintaining exceptional clarity, making it suitable for various audio setups.
The NS-02E can function as a dedicated headphone amplifier or as a tube pre-amplifier, allowing integration with existing power amplifiers to improve musicality and dynamic range. Its design supports easy tube replacement, offering flexibility for sound customization.
2. パッケージ内容
パッケージに以下の項目が含まれているか確認してください。
- 1 × Nobsound NS-02E Headphone Ampリファイアー
- 1 × Power Supply Adapter
- 1 × 6N3 Vacuum Tube (pre-installed or separate)
- 1 × Audio Cable (3.5mm to 3.5mm)
3.製品オーバーview
The NS-02E features a robust anodized aluminum chassis, providing durability and a sleek aesthetic. The visible vacuum tube is illuminated with a blue light when powered on, adding to its unique appeal. The front panel includes a volume control knob and 3.5mm input/output jacks, while the rear panel houses the power input.
画像: 正面 view of the Nobsound NS-02E Headphone Amplifier, highlighting its anodized aluminum chassis and the illuminated vacuum tube.
Image: The Nobsound NS-02E amplifier shown with its compact dimensions (90x90x39mm), illustrating its small footprint.
4. セットアップ手順
Nobsound NS-02Eをセットアップするには、次の手順に従ってください。 amplifier：
- チューブの取り付け（事前に取り付けられていない場合）: Gently insert the 6N3 vacuum tube into the socket on top of the amplifier. Ensure the pins align correctly with the socket holes and push down firmly but carefully until it is seated.
- オーディオ入力を接続します: Use the provided 3.5mm audio cable to connect your audio source (e.g., smartphone, computer, iPod, stereo system) to the 'In' jack on the front panel of the NS-02E.
- ヘッドフォンを接続します: ヘッドフォンを 'Out' jack on the front panel of the NS-02E. The amplifier supports headphones with impedance ranging from 18 to 600 ohms.
- 接続電源： Connect the power supply adapter to the DC 6V input jack on the rear panel of the amp次に、電源アダプターを適切な壁のコンセントに差し込みます。
- 初期音量設定: Before powering on, turn the volume knob counter-clockwise to its minimum setting to prevent sudden loud sounds.
Image: Connection diagram illustrating how to connect various audio sources (iPod, smartphone, computer) to the 'In' port and headphones or active speakers to the 'Out' port of the NS-02E.
事前使用Amplifier：
To use the NS-02E as a pre-amplifier, connect your audio source to the 'In' jack as described above. Then, connect the 'Out' jack of the NS-02E to the input of your power amplifier or active speaker system. This configuration allows the NS-02E to process the audio signal before it reaches your main amplificationシステム。
5. 操作手順
- 電源オン: After all connections are made, press the power button (if available, otherwise it powers on when connected to power). The vacuum tube will illuminate with a blue light, indicating the unit is powered on.
- 音量を調整: Slowly turn the volume knob clockwise to increase the sound level to your desired listening volume.
- 楽しむ： Begin playing audio from your connected source.
- 電源を切る： オフにするには amplifier, disconnect the power supply from the wall outlet or press the power button if present.
6. メンテナンス
チューブの交換
The default 6N3 vacuum tube can be replaced with various compatible tubes to customize the sound signature. To replace the tube:
- 電源を切って切断します: 確実に amplifier is powered off and disconnected from the power supply. Allow the tube to cool down completely before handling.
- 古いチューブを取り外す: Gently grasp the existing tube and pull it straight up from its socket. Avoid twisting or bending the pins.
- 新しいチューブを挿入: Carefully align the pins of the new tube with the holes in the socket. Gently push the tube straight down until it is fully seated. Do not force it.
対応チューブタイプ:
- アメリカ: 6A8Q, 2C51, 5670, 5185, 6385, 6185, WE396
- ヨーロッパ： ECC42 試験
- Soviet Union: 6H3N, 6H3II
- ドイツ： ECF82
- チェコ共和国： 6CC42
Image: The Nobsound NS-02E amplifier with a separate vacuum tube, demonstrating the user's ability to replace the default tube with other compatible models for sound customization.
一般的なケア
- 保管してください amp直射日光、熱源、湿気を避け、清潔で乾燥した環境で保管してください。
- Clean the chassis with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
- 上に重い物を置かないでください。 amplifier。
7。 トラブルシューティング
If you encounter issues with your NS-02E amp問題が頻繁に発生する場合は、次の一般的な問題と解決策を参照してください。
| 問題 | 考えられる原因 | 解決 |
|---|---|---|
| 音が出ない |
|
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| Distorted or static sound |
|
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| ハミング音またはブザー音 |
|
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| Blue tube illumination not working |
|
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8. 仕様
| 特徴 | 仕様 |
|---|---|
| モデル | ノブサウンド NS-02E |
| チューブタイプ | 6N3 (default), replaceable |
| 出力電力 | ≥1100mW (32オーム) |
| Adapter Headphone Impedance | 18〜600オーム |
| 全高調波歪み（THD） | <0.005% |
| 信号対雑音比（SNR） | ≥110デシベル |
| 周波数応答 | 20 Hz – 30 kHz |
| 寸法（長さ×幅×高さ） | 90×90×39mm（3.54×3.54×1.54インチ） |
| Height with Tube and Feet | 80ミリメートル |
| 正味重量 | 165g（0.36ポンド） |
| Input/Output Audio Jacks | 3.5ミリメートル |
| シャーシ材質 | アルミニウム |
9. 保証とサポート
For warranty information and technical support, please refer to the documentation provided with your purchase or contact Douk Audio customer service directly. Contact details can typically be found on the manufacturer's official webサイトまたは小売店を通じてご購入いただけます。