1. Rematadoview
The MXR Phase 90 is a classic analog phase shifter pedal designed for electric guitars and other instruments. It is renowned for its rich, warm analog tone, capable of adding shimmery velocity and dramatic swooshing effects to your sound. This pedal features a simple, single-knob control for ease of use and has been a staple on countless professional and amateur pedalboards for decades.

Figura 1: Fronte view of the MXR Phase 90 pedal, showing the single 'Speed' knob, MXR logo, and footswitch.
Características principais:
- Rich, warm analog tone.
- Adds shimmery velocity and dramatic swooshing to your tone.
- Timeless phase shifter used on many classic recordings.
- Simple single-knob 'Speed' control.
- C de metal duradeiroasing.
2. Configuración
Follow these steps to properly set up your MXR Phase 90 pedal:
- Fonte de alimentación: The Phase 90 can be powered by a single 9-volt battery or an optional ECB003 AC Adapter. If using a battery, ensure it is properly installed in the battery compartment (typically accessed by removing the bottom plate). If using an AC adapter, connect it to the 9V DC input jack on the side of the pedal.
- Conexión de entrada: Connect your guitar (or other instrument) to the 'INPUT' jack on the right side of the pedal using a standard 1/4-inch instrument cable.
- Conexión de saída: Conecta a toma "OUTPUT" do lado esquerdo do pedal ao teu amplifier's input (or the next pedal in your signal chain) using another standard 1/4-inch instrument cable.
- Colocación: Place the pedal on a stable surface or integrate it into your pedalboard.

Figura 2: Lateral view of the pedal, highlighting the 9V DC power input jack.

Figura 3: Arriba view of the pedal, showing the 'INPUT' and 'OUTPUT' jacks for signal connection.
3. Accionamento do pedal
The MXR Phase 90 is designed for straightforward operation with its single control knob.
Controis:
- Selector de VELOCIDADE: This is the only control on the pedal. It adjusts the rate of the phasing effect. Turning the knob clockwise increases the speed of the phase sweep, resulting in a faster, more intense modulation. Turning it counter-clockwise slows down the sweep, creating a more subtle and gradual effect.
- Pedal: Press the footswitch to engage or bypass the effect. The red LED indicator will illuminate when the effect is active.
Consellos de uso:
- Experiment with the 'Speed' knob to find the desired modulation rate for your music.
- Place the Phase 90 before or after distortion/overdrive pedals in your signal chain to achieve different tonal characteristics.
4. Mantemento
Proper maintenance will ensure the longevity and optimal performance of your MXR Phase 90 pedal.
- Limpeza: Usa un pano suave e seco para limpar o exterior do pedal. Evita produtos de limpeza abrasivos ou solventes.
- Almacenamento: Garda o pedal nun lugar fresco e seco, lonxe da luz solar directa e de temperaturas extremas.
- Substitución da batería: If using battery power, replace the 9V battery when the LED indicator dims or the effect weakens. Disconnect input/output cables before opening the battery compartment.
- Conexións por cable: Comprobe periodicamente que todas as conexións dos cables estean ben axustadas e que non estean desgastadas nin danadas.
5 Solución de problemas
If you encounter issues with your MXR Phase 90, refer to the following common troubleshooting steps:
- Sen son:
- Asegúrate de que todos os cables estean conectados de forma segura ás tomas de entrada/saída correctas.
- Check the power supply. If using a battery, replace it. If using an AC adapter, ensure it is properly plugged in and functioning.
- Test the pedal with different cables, guitar, and ampvitalizador para illar o problema.
- Weak or Distorted Effect:
- Check the power supply; a weak battery can cause degraded performance.
- Ensure the 'Speed' knob is not set to an extreme position that might produce an undesirable sound.
- Ruído non desexado:
- Ensure you are using a regulated 9V DC power supply if not using a battery.
- Check for ground loops in your setup.
- Asegúrate de que todos os cables estean apantallados e en bo estado.
6. Especificacións
| Característica | Especificación |
|---|---|
| Número de modelo | M101 |
| Dimensións (L x W x H) | 5.5" x 2.5" x 4.5" |
| Peso do elemento | 1 libra |
| Requisitos de enerxía | 9V DC (single 9V battery or optional ECB003 AC Adapter) |
| Tipo de conector | 6.35mm (1/4") Jack Plug |
| Interface de hardware | Audio de 1/4 de polgada |
| Formato de sinal | Analóxico |
| Material do corpo | Metal, plástico |
| Cor | Laranxa |
| Primeiro dispoñible | 13 de abril de 2004 |
7. Garantía e soporte
For warranty information and technical support, please refer to the official MXR website or contact the retailer from whom you purchased the product. Keep your proof of purchase for any warranty claims. Specific warranty terms and conditions may vary by region.