1. はじめに
The Palmer Monicon L is a precise analog volume control designed for professional audio environments. It serves as an intermediary device between audio sources, such as computers or audio interfaces, and self-powered monitor loudspeakers. Its passive circuitry ensures signal integrity without coloration. The unit features LED indicators and a built-in headphone amplifier, which are powered by the included DC adapter.
This manual provides detailed instructions for the setup, operation, and maintenance of your Palmer Monicon L to ensure optimal performance and longevity.

Figure 1: Palmer Monicon L Passive Monitor Controller, front angled view. This image shows the main unit with its large stereo volume knob, smaller auxiliary volume and headphone knobs, and various input/output selection buttons.
2. 重要な安全上の注意事項
- デバイスを操作する前に、これらの手順をよくお読みください。
- 今後の参照用にこれらの手順を保管してください。
- 製品およびこのマニュアルに記載されているすべての警告に従ってください。
- この装置を水の近くで使用しないでください。
- 乾いた布でのみ清掃してください。
- 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。
3. パッケージ内容
以下にリストされているすべてのアイテムがパッケージに含まれていることを確認してください。
- Palmer Monicon L Passive Monitor Controller
- DC Power Supply (15V, 200mA)

Figure 2: The included DC 15V 200mA power supply. This adapter provides power for the LED indicators and the headphone amplifier。
4.製品オーバーview
4.1 フロントパネルコントロール

図3: トップダウン view of the Palmer Monicon L front panel, highlighting the main controls and indicators.
- STEREO VOLUME Knob: Large central knob for precise control of the main stereo output volume.
- AUX VOLUME Knob: Controls the volume level of the auxiliary input.
- ヘッドホンノブ: Adjusts the output volume for the headphone jack.
- INPUT SELECTION (STEREO/AUX) Buttons: Selects between the main stereo input (1) and the auxiliary input (2).
- OUTPUT SELECTION (1/2) Buttons: Activates or deactivates output pairs 1 and 2. Both can be active simultaneously.
- STEREO MONO Button: Sums the stereo output signal into a mono signal.
- 消音ボタン: Silences all active outputs.
- PFL STEREO / PFL AUX Buttons: Pre-Fader Listen for the stereo and auxiliary inputs, allowing monitoring through headphones independently of the main volume.
- ヘッドホンジャック: 6.35 mm (1/4") TRS jack for connecting headphones.
4.2 リアパネルの接続

図4:背面 view of the Palmer Monicon L, showing all input and output connectors.
- DC 15V 200mA Input: Power input for the included DC adapter.
- MONO SUM Output: XLR connectors for a summed mono output, typically used for a subwoofer.
- OUTPUT 1 (L/R) XLR: Balanced XLR outputs for the first pair of monitor speakers.
- OUTPUT 2 (L/R) XLR: Balanced XLR outputs for the second pair of monitor speakers.
- STEREO INPUT (L/R) Combo Sockets: Balanced combo sockets (XLR/TRS) for the main stereo input.
- AUX INPUT (L/R) RCA & 3.5mm TRS: Auxiliary input featuring RCA connectors and a 3.5 mm TRS jack.
5. セットアップと接続
Follow these steps to connect your Palmer Monicon L to your audio system:
5.1電源接続
- Connect the included DC 15V 200mA power adapter to the "DC 15V 200mA" input on the rear panel of the Monicon L.
- Plug the power adapter into a suitable wall outlet. The LED indicators on the front panel will illuminate.
5.2 オーディオ入力接続
The Monicon L offers two distinct stereo input options:
- Main Stereo Input (Input 1): Use balanced XLR or 1/4" TRS cables to connect your primary audio source (e.g., audio interface, mixer output) to the "STEREO INPUT L/R" combo sockets on the rear panel.
- Auxiliary Input (Input 2): For secondary audio sources (e.g., computer, media player), use RCA cables to the "AUX INPUT L/R" RCA connectors or a 3.5 mm TRS cable to the "AUX INPUT" 3.5mm jack.
5.3 オーディオ出力接続
The Monicon L provides multiple output options for your monitoring setup:
- Monitor Speakers (Output 1 & 2): Connect your self-powered monitor speakers using balanced XLR cables to the "OUTPUT 1 L/R" and/or "OUTPUT 2 L/R" XLR connectors. You can connect up to two pairs of monitors.
- Subwoofer (Mono Sum): If you use a subwoofer, connect it to the "MONO SUM" XLR output. This output provides a summed mono signal of the selected stereo input.
- ヘッドフォン: Plug your headphones into the 6.35 mm (1/4") TRS "HEADPHONES" jack on the front panel.

Figure 5: A diagram illustrating typical connection scenarios for the Palmer Monicon L, showing inputs from an audio interface and a laptop, and outputs to two pairs of speakers and a subwoofer.
6. 操作
This section details the functions of each control on your Monicon L.
6.1 ボリュームコントロール
- ステレオ音量: Rotate this large knob clockwise to increase the volume of the selected stereo output, and counter-clockwise to decrease it. This is the primary volume control for your monitor speakers.
- AUX VOLUME: Adjusts the input level for the auxiliary input source. This allows you to balance the volume of your auxiliary device before it reaches the main stereo volume control.
- ヘッドホン: Controls the listening volume for headphones connected to the front panel jack.
6.2入力の選択
- INPUT SELECTION (1/2): Press the "1" button to select the main stereo input (XLR/TRS combo sockets). Press the "2" button to select the auxiliary input (RCA/3.5mm TRS). Only one input can be active at a time.
6.3 出力選択
- OUTPUT SELECTION (1/2): Press the "1" button to activate the first pair of monitor outputs (OUTPUT 1 L/R). Press the "2" button to activate the second pair of monitor outputs (OUTPUT 2 L/R). You can activate both outputs simultaneously to listen through both speaker pairs.
6.4 監視機能
- STEREO MONO: Press this button to sum the stereo signal into a mono signal. This is useful for checking phase compatibility and how your mix translates to mono playback systems.
- ミュート: Press this button to instantly silence all active outputs. Press it again to restore the audio.
- PFL STEREO / PFL AUX: These buttons enable Pre-Fader Listen for the respective inputs. When activated, the selected input signal is routed directly to the headphone output, bypassing the main STEREO VOLUME control. This allows you to monitor an input source without affecting the main speaker output.
7. メンテナンスとケア
- クリーニング: Disconnect the power adapter before cleaning. Use a soft, dry cloth to wipe the surface of the unit. Do not use liquid cleaners, aerosols, or solvents.
- 環境: Keep the Monicon L away from direct sunlight, excessive heat, moisture, and dust.
- ストレージ: ユニットを長期間保管する場合は、電源を外して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
| 問題 | 考えられる原因 | 解決 |
|---|---|---|
| スピーカーから音が出ない。 |
|
|
| ヘッドホンから音が出ません。 |
|
|
| 歪んだ音声またはノイズの入った音声。 |
|
|
9. 仕様
| モデル | PMONICONL |
| 製品寸法 | 2.4 x 9.4 x 3.3 インチ (6.1 x 23.9 x 8.4 cm) |
| アイテム重量 | 2ポンド(0.91kg) |
| 接続技術 | XLR, RCA, 3.5mm TRS |
| スピーカー Amplificationタイプ | Passive (main signal path) |
| 電源 | Corded Electric (DC 15V 200mA for LEDs/Headphone Amp) |
| 材質タイプ | Wood (side panels), Metal (chassis) |
| 対応デバイス | Personal Computer, Audio Interfaces, Mixers, Active Monitor Speakers |

図6: 次元 view of the Palmer Monicon L, showing its width (9.4"), depth (3.3"), and height (2.4").
10. 保証とサポート
For information regarding warranty terms and conditions, please refer to the warranty card included with your product or visit the official Palmer webサイト。
Should you encounter any issues or require technical assistance, please contact Palmer customer support through their official channels.
パーマー Webサイト: www.パーマードイツ.com





