1. はじめに
The Midas MICROPHONE PREAMPLIFIER 502 is a high-performance, compact 500 Series premium microphone/line preamplifier. It incorporates award-winning Midas amplifier technology, enhanced with quad discrete ultra low noise input transistors, delivering exceptional audio fidelity.
This module features the legendary Midas input, allowing signal levels up to +24 dBu without the need for a pad, while maintaining its much-loved soft clipping characteristic. It also includes classic Midas XL4 swept low and high pass filters with independent selection switches, providing precise tonal shaping. A switchable twin aux balanced output offers mic/line splitter capability when installed in compatible Midas L6 or L10 racks.
図1.1: 前面 view of the Midas MICROPHONE PREAMPLIFIER 502, highlighting its input, gain, filter, and output controls.
2. 重要な安全上の注意事項
Please read these instructions carefully before operating your Midas MICROPHONE PREAMPLIFIER 502. Keep this manual for future reference.
- この装置を雨や湿気にさらさないでください。
- 通気口を塞がないでください。メーカーの指示に従って設置してください。
- ラジエーター、暖房レジスター、ストーブ、その他の機器（以下を含む）などの熱源の近くに設置しないでください。 amp熱を発生する装置。
- 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。
- This product is designed for professional audio applications and should be installed by qualified personnel.
3. 箱の中身
Upon unpacking your Midas MICROPHONE PREAMPLIFIER 502, please ensure all components are present and in good condition:
- Midas マイクプリアンプAMPLIFIER 502 module
- クイックスタートガイド / 安全情報
- 保証登録カード
不足品や破損品がある場合は、すぐに販売店にご連絡ください。
4. セットアップ
The Midas MICROPHONE PREAMPLIFIER 502 is a 500 Series module designed to be installed into a compatible 500 Series rack or chassis (e.g., Midas L6 or L10 racks).
4.1 Installation into a 500 Series Rack
- Ensure your 500 Series rack is powered off and disconnected from the mains supply.
- Carefully align the edge connector of the 502 module with an available slot in your 500 Series rack.
- Gently but firmly push the module into the slot until it is fully seated. Do not force the module.
- Secure the module to the rack using the provided screws (typically two per module) through the faceplate.
- Once all modules are installed, reconnect your 500 Series rack to the mains supply and power it on.
図4.1: 角度付き view of the Midas MICROPHONE PREAMPLIFIER 502, illustrating its form factor for 500 Series rack installation.
4.2オーディオ接続
The 502 module receives its input and sends its output via the 500 Series rack's backplane connections. Refer to your 500 Series rack's manual for specific input/output patching details.
- マイク/ライン入力: Connect your microphone or line-level source to the corresponding input on your 500 Series rack's rear panel.
- 出力： Connect the output of your 500 Series rack to your mixing console, audio interface, or other processing equipment.
- Aux Output (if applicable): If using a Midas L6 or L10 rack, the switchable twin aux balanced output provides additional routing flexibility.
5. Operating the Midas 502
The Midas 502 offers intuitive controls for precise microphone and line-level signal conditioning.
5.1 フロントパネルコントロール
- INPUT (Rotary Knob): Adjusts the input level of the signal. The meter above indicates the input signal level.
- GAIN (Rotary Knob): の量を制御します amplification applied to the input signal.
- LOW PASS (Rotary Knob): Swept low pass filter control, allowing you to cut high frequencies. Range: 3 kHz to 15 kHz.
- HIGH PASS (Rotary Knob): Swept high pass filter control, allowing you to cut low frequencies. Range: 10 Hz to 400 Hz.
- TRIM (Rotary Knob): Fine-tunes the output level of the preamplifier. The meter above indicates the output signal level.
- 48V (Button): Engages +48V phantom power for condenser microphones. An indicator light illuminates when active.
- IN (Button - Phase): Inverts the phase of the input signal (180 degrees). An indicator light illuminates when active.
- IN (Button - Filter Bypass): Bypasses the low and high pass filters. An indicator light illuminates when active.
- TX (Button): Activates the transformer output, providing a distinct sonic character. An indicator light illuminates when active.
- Mic/Line (Switch): Selects between microphone and line-level input impedance and gain staging。
図5.1：詳細 view of the Midas MICROPHONE PREAMPLIFIER 502 front panel controls.
5.2 基本的な操作ワークフロー
- Connect your microphone or line source to the appropriate input on your 500 Series rack.
- 設定する マイク/ライン switch according to your source.
- If using a condenser microphone, engage the 48V ファンタム電源。
- まずは 得 そして 入力 knobs at their minimum settings.
- 徐々に増やして 得 until you achieve a healthy signal level on the input meter, avoiding clipping.
- 調整する ローパス そして ハイパス filters as needed to shape the tone and remove unwanted frequencies.
- 使用 IN (Phase) button if phase correction is required.
- 関与する TX button for transformer coloration if desired.
- 使用 トリム knob to fine-tune the output level to your next device in the signal chain.
6. メンテナンス
The Midas MICROPHONE PREAMPLIFIER 502 is designed for reliable operation with minimal maintenance.
- クリーニング： 本体の外装を清掃する際は、柔らかく乾いた布をご使用ください。研磨剤入りの洗剤や溶剤は使用しないでください。
- 換気： Ensure that the ventilation slots on your 500 Series rack are not obstructed to prevent overheating.
- ストレージ： When not in use for extended periods, store the module in a cool, dry place, ideally within its original packaging or a protective case.
7。 トラブルシューティング
If you encounter issues with your Midas MICROPHONE PREAMPLIFIER 502, refer to the following common troubleshooting steps:
| 問題 | 考えられる原因 | 解決 |
|---|---|---|
| オーディオ出力なし |
|
|
| 歪んだオーディオ |
|
|
| ハムまたはノイズ |
|
|
If the problem persists after trying these steps, please contact Midas customer support or an authorized service center.
8. 仕様
| 特徴 | 仕様 |
|---|---|
| アイテム重量 | 8.25ポンド（3.74kg） |
| 製品寸法（長さ x 幅 x 高さ） | 6.85 x 1.5 x 5.2 インチ (17.4 x 3.8 x 13.2 cm) |
| モデル番号 | マイクプレAMPリフィエ502 |
| 入力タイプ | Microphone / Line |
| ファントムパワー | +48V スイッチング |
| フィルター | Classic XL4 Swept Low Pass (3k-15k), High Pass (10Hz-400Hz) |
| 出力 | Standard 500 Series Output, Switchable Twin Aux Balanced Output (with compatible racks) |
| 初回利用可能日 | 3年2020月XNUMX日 |
図8.1：背面 view of the Midas MICROPHONE PREAMPLIFIER 502, displaying manufacturing and serial information.
9. 保証とサポート
Midas products are built to the highest standards and come with a limited warranty. Please refer to the warranty card included with your product or visit the official Midas web詳細な保証条件については、サイトをご覧ください。
For technical support, service, or spare parts, please contact your authorized Midas dealer or visit the Midas support page online. When contacting support, please have your product model number (MICROPHONE PREAMPLIFIER 502) and serial number ready.
Official Midas Webサイト： ホームページ
