Introdución
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.
Información de seguridade
- Use only the specified 9V DC power supply (center-negative). Incorrect power supplies can damage the unit and void the warranty.
- Do not expose the pedal to extreme temperatures, humidity, or direct sunlight.
- Evite deixar caer o pedal ou sometelo a impactos fortes.
- Do not attempt to open the pedal enclosure or modify its internal components. Refer all servicing to qualified personnel.
- Manter fóra do alcance dos nenos.
Contido do paquete
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
- Dous (2) cables de conexión
- Manual de usuario (este documento)
Produto rematadoview
The MXR M233 Micro Amp+ features intuitive controls for precise tone shaping and signal boosting.

Figura 1: Fronte 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:
- Mando GAIN: Adjusts the amount of boost applied to your signal, from unity gain up to +26dB.
- Mando BASS: Controls the low-frequency response of the boosted signal. Turn clockwise for more bass, counter-clockwise for less.
- Botón TREBLE: Controls the high-frequency response of the boosted signal. Turn clockwise for more treble, counter-clockwise for less.
- Toma de entrada: Connect your instrument or the output of another effects pedal here.
- Toma de saída: Connect this to your ampa entrada do lificador ou a entrada do seguinte pedal na túa cadea de sinal.
- INTERRUPTOR DE PÉ: Toggles the effect on and off. The LED illuminates when the effect is active.
- Entrada de 9 V CC: Connect a 9V DC (center-negative) power adapter here.

Figura 2: Traseira view of the MXR Micro Amp+ pedal, highlighting the 9V DC power input jack.
Configuración
Follow these steps to connect your MXR M233 Micro Amp+ pedal:
- Conexión de alimentación: 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.
- Conexión do instrumento: Use one of the provided instrument cables to connect your guitar or bass to the ENTRADA jack of the Micro Amp+.
- AmpConexión de lifier: Use another instrument cable to connect the SAÍDA jack of the Micro Amp+ to your ampentrada do lifer.
- 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.

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

Figura 4: Example of a patch cable included in the bundle.
Instrucións de funcionamento
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).
- Axustar a ganancia: Xire o GANANCIA 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:
- BAIXO: Axustar o Bass knob to add or cut low frequencies. For a classic Micro Amp sound, set this knob to the 12 o'clock (noon) position.
- TREBLE: Axustar o TREBLE knob to add or cut high frequencies. For a classic Micro Amp sound, set this knob to the 12 o'clock (noon) position.
- Experimento: 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.
Mantemento
To ensure the longevity and optimal performance of your MXR M233 Micro Amp+:
- Limpeza: Limpa o pedal cun pano suave e seco. Non empregues produtos de limpeza abrasivos nin solventes.
- Almacenamento: Garda o pedal nun lugar fresco e seco, lonxe da luz solar directa e de temperaturas extremas cando non o uses.
- Coidado do cable: Handle instrument and patch cables carefully. Avoid sharp bends or kinks that can damage the internal wiring.
- Fonte de alimentación: Desconecte sempre a fonte de alimentación cando non se use o pedal durante períodos prolongados.
Resolución de problemas
| Problema | Causa posible | Solución |
|---|---|---|
| No sound when pedal is active. | Incorrect power supply, faulty cables, incorrect connections, pedal bypassed. | Verify 9V DC (center-negative) power supply. Check all cable connections. Ensure footswitch LED is illuminated. Test cables with another device. |
| Ruído ou zunido excesivo. | Ground loop, faulty power supply, interference from other electronics. | Use a high-quality isolated power supply. Try a different power outlet. Move pedal away from other electronic devices. Check for faulty cables. |
| O LED non se acende. | 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. |
Se continúas a ter problemas, ponte en contacto co servizo de atención ao cliente.
Especificacións
| Característica | Detalle |
|---|---|
| Modelo | M233 Micro Amp+ |
| Formato de sinal | Analóxico |
| Efectos de saída de audio | Preamp / Boost |
| Gañamento máximo | +26 dB |
| Fonte de enerxía | Corded Electric (9V DC, center-negative) |
| Voltage | 9 voltios |
| Cambio | True Bypass |
| Peso do elemento | 1.68 pounds (pedal and bundle accessories) |
| Dimensións do paquete | 11.3 x 9.96 x 2.99 polgadas |
| Cor | Branco |
Garantía e Soporte
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 websitio: www.jimdunlop.com/mxr/