AMC SUB 2 Active Subwoofer Instruction Manual

導入

The AMC SUB 2 is an active subwoofer designed for very low-frequency sound reproduction. It features a 200W amplifier and a high-quality aramid glass composite woofer mounted at the front. It delivers strong bass output with a sensitivity of 90 dB. Its compact size and powerful bass make it suitable for any audio setup requiring deep low frequencies. This manual provides essential information for the safe and efficient use of your AMC SUB 2 subwoofer.

安全情報

本装置を操作する前に、すべての安全に関する指示をよく読んで理解してください。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。

• 感電の危険: Do not open the subwoofer enclosure. There are no user-serviceable parts inside. Refer all servicing to qualified service personnel.
• 電源: Connect the unit only to an AC power outlet that matches the voltage and frequency specified on the rear panel (230V, 50Hz/60Hz).
• 湿気と熱: Do not expose this appliance to rain, moisture, dripping, or splashing. Do not place objects filled with liquids, such as vases, on the apparatus. Avoid placing the unit near heat sources or in direct sunlight.
• 換気： ユニット周囲の換気を十分に確保してください。通気口を塞がないでください。
• クリーニング： 清掃する前に電源コードを抜いてください。乾いた布のみを使用してください。
• 配置: サブウーファーが落下しないように、安定した水平な場所に置いてください。

画像1: Rear panel of the AMC SUB 2 Active Subwoofer. This view displays all input/output connections, control knobs for Volume, Low Pass, and Phase, the Ground Lift switch, and the power input with the main power switch.

コントロールと接続

The rear panel of the AMC SUB 2 provides all necessary controls and connection points for integration into your audio system. Refer to Image 1 for visual reference.

• ボリューム： This knob adjusts the overall output level of the subwoofer. Range from -30dB to +6dB.
• ローパス： This knob sets the upper frequency limit for the subwoofer, allowing you to blend it seamlessly with your main speakers. Adjustable from 50Hz to 130Hz.
• 段階： This switch (0°/180°) allows you to adjust the phase of the subwoofer's output relative to your main speakers. This helps to optimize bass response and avoid cancellation.
• ライン入力（RCA）： Stereo RCA inputs (Right/Left) for connecting to the line-level output of your audio source (e.g., receiver, pre-amplifier）。
• ライン出力（RCA）： Stereo RCA outputs (Right/Left) for passing the audio signal to other components.
• IN (XLR/TRS): Balanced XLR and 6.3mm TRS (Tip-Ring-Sleeve) inputs for professional audio connections. Available for both Left and Right channels.
• OUT (XLR/TRS): Balanced XLR and 6.3mm TRS outputs for passing the audio signal to other professional audio equipment. Available for both Left and Right channels.
• グラウンドリフト: This switch helps to eliminate hum or buzz caused by ground loops in your audio system.
• 電源スイッチ： Toggles the subwoofer's power ON or OFF.
• AC入力： Connector for the detachable power cord. Ensure the correct voltage（230V）が供給されます。

設定

1. 配置: Position the subwoofer in your listening area. Experiment with different locations to find the best bass response. Corner placement often enhances bass, but can also lead to boominess.
2. 電源接続: Ensure the POWER switch is in the OFF position. Connect the supplied power cord to the AC IN socket on the subwoofer's rear panel and then to a suitable wall outlet.
3. オーディオ接続：
   • RCA接続: Connect RCA cables from the LFE (Low-Frequency Effects) or Subwoofer output of your receiver/pre-amplifier to the LINE IN (Left or Right, or both for stereo) on the SUB 2. If your source has stereo line outputs, connect both Left and Right to the corresponding LINE IN on the SUB 2.
   • XLR/TRS Connection: For professional setups, connect balanced XLR or 6.3mm TRS cables from your audio mixer or processor's outputs to the IN (Left/Right) on the SUB 2.
4. 初期設定：
   • Set the VOLUME knob to its minimum position (-30dB).
   • Set the LOW PASS knob to a starting point, typically around 80Hz.
   • PHASEスイッチを0°に設定します。

オペレーティング

1. 電源オン: Turn on your main audio system components first, then switch the POWER button on the SUB 2 to the ON position.
2. 音量調整: Play some audio with significant bass content. Slowly increase the VOLUME knob on the SUB 2 until the bass output blends well with your main speakers. Avoid setting the volume too high, which can lead to distortion.
3. Low Pass Filter Adjustment: Adjust the LOW PASS knob to fine-tune the crossover frequency. The goal is to have a smooth transition between the subwoofer and your main speakers. If your main speakers are small, a higher crossover frequency (e.g., 100-120Hz) might be appropriate. For larger speakers, a lower frequency (e.g., 60-80Hz) may be better.
4. 位相調整： Experiment with the PHASE switch (0° or 180°). Listen for the setting that provides the most impactful and coherent bass response at your listening position. This often involves trying both settings and choosing the one that sounds louder or more defined.
5. グラウンドリフト： If you experience a persistent hum or buzz, try flipping the GROUND LIFT switch. This can help break ground loops that cause unwanted noise.
6. 電源を切る： When finished, switch the POWER button on the SUB 2 to the OFF position, then turn off your main audio system components.

メンテナンス

• クリーニング： Disconnect the power cord before cleaning. Use a soft, dry cloth to wipe the exterior surfaces of the subwoofer. Do not use liquid cleaners, aerosols, or abrasive materials, as these can damage the finish.
• 換気： 適切な空気の流れを確保し、過熱を防ぐために、通気口にほこりやごみが詰まっていないことを定期的に確認してください。
• ストレージ： If storing the subwoofer for an extended period, ensure it is in a dry, cool environment, away from direct sunlight and extreme temperatures.

トラブルシューティング

If you encounter issues with your AMC SUB 2, refer to the following common problems and solutions:

仕様

保証とサポート

For warranty information and technical support, please refer to the documentation provided at the time of purchase or contact your authorized AMC dealer or distributor. Keep your proof of purchase for any warranty claims.