Einführung
The MXR M233 Micro Amp+ is an advanced guitar and bass effects pedal designed to boost and enhance your instrument's tone. Building upon the classic Micro Amp circuit, this pedal features added EQ controls (Bass and Treble), low-noise operational amplifiers, and true bypass switching for superior signal integrity. It provides up to +26dB of clean boost, allowing you to drive your amplifier harder or increase your signal level for solos.
Sicherheitshinweise
- Use only the specified 9V DC power supply (center-negative). Incorrect power supplies can damage the unit and void the warranty.
- Setzen Sie das Pedal keinen extremen Temperaturen, hoher Luftfeuchtigkeit oder direkter Sonneneinstrahlung aus.
- Vermeiden Sie es, das Pedal fallen zu lassen oder starken Stößen auszusetzen.
- Do not attempt to open the pedal enclosure or modify its internal components. Refer all servicing to qualified personnel.
- Außerhalb der Reichweite von Kindern aufbewahren.
Packungsinhalt
Your MXR M233 Micro Amp+ bundle includes:
- MXR M233 Micro Amp+ Pedal
- 9V DC Power Supply (not explicitly listed in product data, but implied by 'PSU' in model number and standard pedal operation)
- Two (2) Instrument Cables
- Two (2) Patch Cables
- Benutzerhandbuch (dieses Dokument)
Produkt überview
The MXR M233 Micro Amp+ features intuitive controls for precise tone shaping and signal boosting.

Abbildung 1: Front view of the MXR M233 Micro Amp+ pedal, showing the Gain, Bass, and Treble control knobs, the footswitch, and the Input/Output jacks.
Controls and Jacks:
- GAIN-Regler: Adjusts the amount of boost applied to your signal, from unity gain up to +26dB.
- BASS-Regler: Controls the low-frequency response of the boosted signal. Turn clockwise for more bass, counter-clockwise for less.
- TREBLE-Regler: Controls the high-frequency response of the boosted signal. Turn clockwise for more treble, counter-clockwise for less.
- Eingangsbuchse: Connect your instrument or the output of another effects pedal here.
- OUTPUT-Buchse: Verbinden Sie dies mit Ihrem ampDer Eingang des Verstärkers oder der Eingang des nächsten Effektpedals in Ihrer Signalkette.
- FUSSSCHALTER: Toggles the effect on and off. The LED illuminates when the effect is active.
- 9-V-DC-Eingang: Connect a 9V DC (center-negative) power adapter here.

Abbildung 2: Hinteren view of the MXR Micro Amp+ pedal, highlighting the 9V DC power input jack.
Aufstellen
Follow these steps to connect your MXR M233 Micro Amp+ pedal:
- Stromanschluss: Connect a 9V DC (center-negative) power adapter to the 9V DC input jack on the pedal. Ensure the power adapter is compatible to prevent damage.
- Geräteanschluss: Use one of the provided instrument cables to connect your guitar or bass to the EINGANG jack of the Micro Amp+.
- Amplifier-Verbindung: Use another instrument cable to connect the AUSGABE jack of the Micro Amp+ to your ampEingang des Reglers.
- Signal Chain Integration (Optional): If integrating into an existing pedalboard, use the provided patch cables to connect the Micro Amp+ between other effects pedals. The Micro Amp+ is typically placed early in the signal chain to boost the instrument's signal before other effects, or later to boost the overall signal for solos.

Abbildung 3: Example of an instrument cable included in the bundle.

Abbildung 4: Example of a patch cable included in the bundle.
Bedienungsanleitung
Once connected, operate your MXR M233 Micro Amp+ as follows:
- Activate the Pedal: Press the footswitch to engage the effect. The LED will light up, indicating the pedal is active. Press again to bypass the effect (true bypass).
- Verstärkung anpassen: Drehen Sie den GEWINNEN knob clockwise to increase the boost level. Start with the knob at a lower setting and gradually increase to achieve the desired volume and drive.
- Shape Tone with EQ:
- BASS: Passen Sie die BASS knob to add or cut low frequencies. For a classic Micro Amp sound, set this knob to the 12 o'clock (noon) position.
- VERDREIFACHEN: Passen Sie die VERDREIFACHEN knob to add or cut high frequencies. For a classic Micro Amp sound, set this knob to the 12 o'clock (noon) position.
- Experiment: The optimal settings will vary depending on your instrument, amplifier, and other pedals. Experiment with different knob positions to find the sound that best suits your needs.
Wartung
To ensure the longevity and optimal performance of your MXR M233 Micro Amp+:
- Reinigung: Wischen Sie das Pedal mit einem weichen, trockenen Tuch ab. Verwenden Sie keine Scheuermittel oder Lösungsmittel.
- Lagerung: Bewahren Sie das Pedal bei Nichtgebrauch an einem kühlen, trockenen Ort fern von direkter Sonneneinstrahlung und extremen Temperaturen auf.
- Kabelpflege: Handle instrument and patch cables carefully. Avoid sharp bends or kinks that can damage the internal wiring.
- Stromversorgung: Trennen Sie das Gerät immer vom Stromnetz, wenn es längere Zeit nicht benutzt wird.
Fehlerbehebung
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| No sound when pedal is active. | Falsche Stromversorgung, defekte Kabel, falsche Anschlüsse, Pedal überbrückt. | Verify 9V DC (center-negative) power supply. Check all cable connections. Ensure footswitch LED is illuminated. Test cables with another device. |
| Übermäßiger Lärm oder Brummen. | Erdschleife, fehlerhaftes Netzteil, Störungen durch andere elektronische Geräte. | Use a high-quality isolated power supply. Try a different power outlet. Move pedal away from other electronic devices. Check for faulty cables. |
| LED leuchtet nicht. | No power, faulty power supply, pedal not engaged. | Ensure power supply is connected and functional. Press the footswitch to engage the effect. |
| Boost level is too low/high. | GAIN knob setting. | Adjust the GAIN knob to the desired level. |
Sollten weiterhin Probleme auftreten, wenden Sie sich bitte an den Kundendienst.
Technische Daten
| Besonderheit | Detail |
|---|---|
| Modell | M233 Micro Amp+ |
| Signalformat | Analog |
| Audioausgabeeffekte | Voramp / Boost |
| Maximaler Gewinn | +26 dB |
| Stromquelle | Kabelgebundenes Elektrogerät (9V DC, Mittelkontakt negativ) |
| Bandtage | 9 Volt |
| Umschalten | True Bypass |
| Artikelgewicht | 1.68 pounds (pedal and bundle accessories) |
| Verpackungsabmessungen | 11.3 x 9.96 x 2.99 Zoll |
| Farbe | Weiß |
Garantie und Support
This product is covered by a manufacturer's warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or visit the official MXR website. For technical support, troubleshooting assistance, or warranty claims, please contact the retailer where the product was purchased or the manufacturer's customer service department.
For additional resources and product information, you may visit the official MXR webWebsite: www.jimdunlop.com/mxr/





