1. はじめに
The Pro-Ject Phono Box S2 is a high-quality phono preamplifier designed to enhance the audio signal from your turntable before it reaches your amplifier or receiver. It features audiophile-grade components and a dual mono configuration for superior sound reproduction. This manual provides detailed instructions for setting up, operating, and maintaining your Phono Box S2.
主な特徴:
- Audiophile Performance
- Dual mono configuration for enhanced channel separation
- Audiophile-grade amp化モジュール
- Audiophile-grade polypropylene WIMA capacitors
- Precise RIAA equalization
- Adjustable input impedance and capacitance via DIP switches
- Selectable gain settings for Moving Magnet (MM) and Moving Coil (MC) cartridges
2. 安全に関する注意事項
デバイスを操作する前に、これらの安全に関する注意事項をよくお読みください。このマニュアルは、今後の参考のために保管してください。
- Always disconnect the device from the power outlet before cleaning or if it will not be used for an extended period.
- デバイスを雨や湿気にさらさないでください。
- ラジエーター、暖房送風口、ストーブ、その他の熱を発生する装置などの熱源の近くにデバイスを置かないでください。
- 通気口を塞がないでください。ユニット周囲の適切な空気の流れを確保してください。
- メーカー指定のアタッチメント/アクセサリのみを使用してください。
- すべての修理は資格のあるサービス担当者に依頼してください。電源コードやプラグが破損している、液体がこぼれた、装置内に物が落ちた、装置が雨や湿気にさらされた、正常に動作しない、装置を落としたなど、装置が何らかの損傷を受けた場合は修理が必要です。
3. 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ことを確認してください。
- Pro-Ject Phono Box S2 Unit
- 18V DC電源
- 取扱説明書
4.製品オーバーview
フロントパネル
The front panel of the Phono Box S2 features a minimalist design with a single control element.
図1: 前面 view of the Pro-Ject Phono Box S2 in black. The front panel features a circular power button on the left side, with a small LED indicator above it. The 'P Phono Box S2' logo is printed below the button.
- 電源ボタン: 本機の電源をオンまたはオフにするために使用します。
- 電源LED: ユニットの電源がオンになると点灯します。
背面パネル
The rear panel provides all necessary connections for your turntable and amplifier, along with the power input.
図2：背面 view of the Pro-Ject Phono Box S2. From left to right, it shows a ground screw terminal, 'In' RCA jacks (Left and Right), a 'Subsonic' button, 'Out' RCA jacks (Left and Right), and the 18V power input jack.
- 地上ターミナル： Connects to the ground wire from your turntable to minimize hum.
- In (RCA): Audio input from your turntable (Left and Right channels).
- Subsonic Button: Activates or deactivates the subsonic filter, which removes very low-frequency rumble.
- 出力（RCA）： Audio output to your amplifier or receiver (Left and Right channels).
- 18V DC電源入力: Connects to the supplied 18V DC power adapter.
5. セットアップ
Follow these steps to properly set up your Pro-Ject Phono Box S2.
5.1. 接続
- Ensure all audio components are turned off before making connections.
- ターンテーブルからのRCA出力ケーブルを 'In' RCA jacks on the rear of the Phono Box S2. Ensure left and right channels are correctly matched.
- ターンテーブルからのアース線を アース端子 on the Phono Box S2. This helps reduce hum.
- 接続する 'Out' RCA jacks of the Phono Box S2 to a line-level input on your amplifier or receiver (e.g., CD, Aux, Line In). Do not connect to a phono input on your amplifier, as this will result in distorted sound.
- Connect the supplied 18V DC power supply to the '18V DC' input on the rear of the Phono Box S2, then plug the power supply into a wall outlet.
図3：例ample setup with a turntable connected to a Pro-Ject Phono Box S2. The image illustrates the compact size of the phono preamplifier next to a turntable.
5.2. DIP Switch Settings (Bottom Panel)
The Phono Box S2 features DIP switches on its underside, allowing you to adjust gain, input impedance, and input capacitance to match your specific phono cartridge. There are two sets of switches, one for the left channel and one for the right. Ensure both sets are configured identically.
Refer to your cartridge's specifications for recommended settings. If you are unsure, consult your cartridge manufacturer's documentation or an audio specialist.
| 設定 | 説明 | Common Values / Purpose |
|---|---|---|
| ゲイン（dB） | 調整します amplificationレベル。 | 40dB： Standard for Moving Magnet (MM) cartridges. 43dB： Slightly higher gain for MM, or some high-output MC. 60dB： Standard for Moving Coil (MC) cartridges. 63dB： Slightly higher gain for MC. |
| Input Impedance (Ohms) | Sets the electrical load presented to the cartridge. | 47k Ohms: Standard for MM cartridges. 10/100/1k/2k Ohms: For MC cartridges, match to cartridge recommendation. |
| 入力容量 (pF) | Sets the electrical capacitance presented to the cartridge. | 100pF/200pF/320pF/420pF: Primarily for MM cartridges. Match to cartridge recommendation, often combined with tonearm cable capacitance. |
注記： Always power off the Phono Box S2 and disconnect the power supply before changing DIP switch settings to avoid potential damage or unexpected behavior.
6. 操作
Once all connections are made and DIP switches are set, operating the Phono Box S2 is straightforward.
- Press the power button on the front panel to turn on the Phono Box S2. The power LED will illuminate.
- 電源を入れる amplifier/receiver and select the input to which the Phono Box S2 is connected.
- ターンテーブルでレコードを再生し、音量を調整します。 ampスピーカー/レシーバーを希望のリスニング レベルに調整します。
- To turn off the unit, press the power button again. The power LED will extinguish.
亜音速フィルター
The subsonic filter button on the rear panel can be used to remove very low-frequency rumble that can be generated by warped records or turntable motor vibrations. This can improve sound clarity and prevent unnecessary strain on your amplifier and speakers. Press the button to toggle the filter on or off.
7. メンテナンス
The Pro-Ject Phono Box S2 requires minimal maintenance.
- クリーニング： 本体の外装は、柔らかく乾いた布で拭いてください。液体洗剤や溶剤は表面の仕上げを傷める可能性があるため、使用しないでください。
- 配置: Place the unit on a stable, level surface away from direct sunlight, heat sources, and excessive dust. Ensure adequate ventilation.
- ストレージ： ユニットを長期間保管する場合は、電源から外し、涼しく乾燥した場所に保管してください。
8。 トラブルシューティング
If you encounter issues with your Phono Box S2, refer to the following common problems and solutions.
| 問題 | 考えられる原因 | 解決 |
|---|---|---|
| 音が出ない、または音の出力が非常に小さい。 | Incorrect connections; Phono Box S2 not powered on; Amplifier input not selected; Incorrect gain setting. | Check all RCA and power connections. Ensure Phono Box S2 is powered on. Select the correct line-level input on your amplifier. Verify DIP switch gain settings match your cartridge. |
| Distorted or harsh sound. | 接続先 amplifier's phono input; Incorrect gain setting (too high); Incorrect impedance/capacitance. | Connect Phono Box S2 to a line-level input (CD, Aux) on your amplifier. Adjust DIP switch gain to a lower setting. Verify impedance and capacitance settings match your cartridge. |
| ハミング音またはブザー音。 | アース線が接続されていない、アース ループがある、近くの電気干渉がある。 | Ensure turntable ground wire is securely connected to the Phono Box S2 ground terminal. Try connecting the Phono Box S2 and amplifier to the same power strip. Move the unit away from other electronic devices. |
| Sound is dull or lacking detail. | Incorrect impedance or capacitance setting. | Adjust DIP switch impedance and capacitance settings to better match your cartridge's specifications. |
If the problem persists after trying these solutions, please contact Pro-Ject customer support or your authorized dealer.
9. 仕様
Technical specifications for the Pro-Ject Phono Box S2.
| 特徴 | 詳細 |
|---|---|
| モデル番号 | PHBOXS2BLK |
| 入力インピーダンス（MM） | 47kオーム |
| 入力インピーダンス（MC） | 10 / 100 / 1k / 2k Ohms (selectable) |
| Input Capacitance (MM) | 100 / 200 / 320 / 420 pF (selectable) |
| Gain (MM) | 40dB / 43dB (selectable) |
| Gain (MC) | 60dB / 63dB (selectable) |
| 信号対ノイズ比 | 85dB (MM), 72dB (MC) (typical) |
| THD+N | 0.0005% (MM), 0.0008% (MC) (typical) |
| RIAA Equalization Accuracy | +/- 0.4dB (20Hz-20kHz) (typical) |
| 出力巻tage | 0.5V @ 1kHz (at 5mV input) (typical) |
| 電源 | 18V / 500mA DC |
| 製品寸法（長さ x 幅 x 高さ） | 4.65 x 4.06 x 1.42 インチ (11.8 x 10.3 x 3.6 cm) |
| 重さ | 1.5ポンド（0.68kg） |
| メーカー | Pro-Jectオーディオシステム |
| 初回利用可能日 | 8年2017月XNUMX日 |
Note: Specifications are subject to change without notice. Typical values are provided where exact figures are not available.
10. 保証とサポート
Pro-Ject Audio Systems products are manufactured to the highest standards and undergo strict quality control. For warranty information and technical support, please refer to the warranty card included with your product or visit the official Pro-Ject Audio Systems webサイトでご確認ください。保証請求の際は購入証明として領収書を保管してください。
For further assistance, you may also contact your authorized Pro-Ject dealer.