Aune S17 Pro ヘッドホン Amplifierユーザーマニュアル

1. はじめに

This manual provides detailed instructions for the setup, operation, and maintenance of your Aune S17 Pro Headphone Amplifier. The S17 Pro is a Class-A, fully-discrete, fully-balanced headphone ampリファイヤとプレamplifier designed for high-fidelity audio systems. It features multiple headphone outputs (6.35mm, XLR, 4.4mm) and preamp outputs (XLR, RCA) for versatile connectivity.

2. 箱の中身

• Aune S17 Pro ヘッドホン Ampリファイアー
• 電源コード
• 6.35mmから3.5mmのアダプター
• リモートコントロール
• クイックスタートガイド

3.製品オーバーview

3.1フロントパネル

Image: Front and Rear Panel Overview of the Aune S17 Pro. The front panel shows the display screen, multifunction knob, headphone jacks, and remote control receiver. The rear panel shows various input and output ports.

• バランス型4ピンXLRヘッドフォンソケット: バランス型ヘッドフォン接続用。
• バランス4.4mmヘッドフォンジャック: バランス型ヘッドフォン接続用。
• 6.35mmヘッドフォンジャック： シングルエンドのヘッドフォン接続用。
• リモコン受信機： Infrared receiver for the included remote control.
• 表示画面: Shows volume level, input selection, gain level, and quiescent current mode.
• 多機能ノブ: Controls volume, input selection, and gain/current settings.
• 電源インジケータライト： 本機の電源状態を示します。

3.2 背面パネル

• XLR Line In (R/L): バランスオーディオ入力。
• RCA Line In (R/L): Single-ended audio input.
• XLRプリamp Out (R/L): Balanced audio output for connecting to power ampライブ配信者またはアクティブスピーカー。
• RCAプレamp Out (R/L): Single-ended audio output for connecting to power ampライブ配信者またはアクティブスピーカー。
• 電源スイッチと電源入力: Main power connection and on/off switch.

4. セットアップ

1. 配置: Place the S17 Pro on a stable, flat surface with adequate ventilation. Ensure no objects block the rear panel heat emission holes.
2. 電源接続: Connect the provided power cord to the power input on the rear panel and then to a suitable 110V AC power outlet. Caution: This device operates on 110V. Please verify your local voltag使用前に必ず確認してください。
3. オーディオ入力: Connect your audio source (e.g., DAC, CD player) to either the XLR Line In or RCA Line In ports on the rear panel.
4. ヘッドホン接続: Connect your headphones to the appropriate jack on the front panel (6.35mm, 4.4mm balanced, or 4-pin XLR balanced).
5. 前amp 出力（オプション）: If using the S17 Pro as a pre-amplifier, connect the XLR Preamp Out or RCA Preamp Out to your power ampライファまたはアクティブスピーカー。
6. 電源オン: Flip the power switch on the rear panel to the 'ON' position. The display screen will illuminate.

5. 操作手順

1. 音量コントロール: Rotate the multifunction knob clockwise to increase volume and counter-clockwise to decrease volume. The current volume level is displayed on the screen.
2. 入力選択: Single press the multifunction knob to cycle through available inputs (RCA, XLR). The selected input will be shown on the display.
3. ゲインレベル調整: Long press the multifunction knob to switch between Low Gain (G-L) and High Gain (G-H) modes. Low gain is suitable for sensitive IEMs, while high gain provides more power for demanding headphones.
4. Quiescent Current Mode: Double press the multifunction knob to switch between 50mA and 100mA quiescent current modes. The selected mode is indicated on the display. The 100mA mode offers a richer sound but generates more heat.

6. 主な特徴

6.1 Twin JFET Design

Image: Close-up of the Aune S17 Pro circuit board highlighting the Twin JFET components. This design contributes to the amplifier's sound characteristics.

The S17 Pro incorporates a Twin JFET design, utilizing two JFET transistors per channel. JFETs are known for their high input impedance and a sound signature often compared to vacuum tubes. The Twin JFET implementation ensures consistent performance and stable mid-point voltage. The final output stage uses 2 pairs of output transistors in parallel, totaling 16 output transistors for the entire device, providing a maximum output of 7.5W to drive various headphones and IEMs.

6.2 Class-A Operation with Adjustable Current

Image: The Aune S17 Pro front panel with text indicating 'Class-A Current Adjustable Two Levels'.

The S17 Pro operates in Class-A mode, offering two selectable quiescent current levels: 50mA and 100mA per transistor. With two pairs of transistors in parallel per channel, the quiescent current can be as high as 100mA or 200mA per channel. Class-A amplification is characterized by a mellow, warm, and smooth sound. The two gain levels (low and high) allow for optimal driving of both sensitive IEMs and power-hungry headphones.

6.3 R2R Electronic Volume Chip

画像: 詳細 view of the Aune S17 Pro circuit board, highlighting the R2R electronic volume chip and surrounding components.

The S17 Pro utilizes an R2R electronic volume chip from JRC, combined with dedicated op-amps, to implement a 4-way balanced R2R volume control. This design provides high control precision, excellent channel balance, a wide soundstage, and accurate sound positioning.

6.4 Advanced Cooling Structure

画像: 内部 view of the Aune S17 Pro, showing the complex 3-dimensional cooler structure and various high-quality components.

To ensure stable Class-A operation, the S17 Pro features a complex 3-dimensional cooler structure. This system integrates the heat sink on the transistors, a heat plate at the bottom, and the chassis to form an efficient cooling system. Heat is dissipated through the rear panel heat emission holes, maintaining Class-A stability. The unit also includes overheat protection, which automatically switches the quiescent current to 50mA if the internal temperature reaches 69°C.

6.5 Power Supply and Component Selection

Image: The Aune S17 Pro showing its multi-connectivity options on the rear panel and the multifunction knob with remote control on the front.

The S17 Pro is equipped with a 50W low-ripple toroidal transformer and a dual-power design, ensuring digital and analog sections operate independently to prevent interference. A 19200 μF capacitor array further contributes to the amplifier's powerful and rich sound. High-quality components such as electrolytic capacitors, ceramic capacitors, organic thin-film capacitors, and communication-grade PCBs are carefully selected for optimal audio performance.

7. 仕様

8。 トラブルシューティング

• 音が出ない:
  • Ensure the power cord is securely connected and the unit is powered on.
  • Verify that the correct input source (RCA/XLR) is selected on the S17 Pro.
  • Check headphone connections and ensure they are fully inserted into the correct jack.
  • Confirm the volume level is not set to minimum or muted.
  • Check the audio cables connecting your source to the S17 Pro for damage or incorrect connection.
• Unit Gets Hot:
  • The S17 Pro operates in Class-A mode, which naturally generates heat. A slow temperature rise is normal.
  • Ensure adequate ventilation around the unit. Do not place it in an enclosed space or stack other heat-generating devices directly on top.
  • If the temperature reaches 69°C, the overheat protection will automatically switch the quiescent current from 100mA to 50mA to prevent damage. This is a normal protective function.
  • If excessive heat is a concern, consider operating in 50mA quiescent current mode or ensuring better airflow.
• リモコンが応答しない:
  • リモコンの電池を確認し、必要に応じて交換してください。
  • Ensure there are no obstructions between the remote control and the receiver on the front panel.
  • リモコンを受信機に直接向けます。

9. 安全情報

• ユニットを雨、湿気、または極端な温度にさらさないでください。
• ユニットを熱源の近くや直射日光の当たる場所に置かないでください。
• cを開けないでくださいasing. すべての修理は資格を持った担当者に依頼してください。
• 付属の電源コードまたは適切な交換品のみを使用してください。
• 過熱を防ぐために適切な換気を確保してください。
• 聴覚障害を防ぐため、過度に大きな音量で長時間聴くことは避けてください。

10. 保証とサポート

Aune products typically come with a manufacturer's warranty. Please refer to the warranty card included with your product or visit the official Aune website for specific warranty terms and conditions. For technical support, product inquiries, or service, please contact Aune customer service through their official channels.