1.Overview
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.

Figur 1: Forside view of the MXR Phase 90 pedal, showing the single 'Speed' knob, MXR logo, and footswitch.
Nøglefunktioner:
- 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.
- Holdbart metal casing.
2. Opsætning
Follow these steps to properly set up your MXR Phase 90 pedal:
- Strømforsyning: 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.
- Indgangsforbindelse: 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.
- Udgangsforbindelse: Connect the 'OUTPUT' jack on the left side of the pedal to your amplifier's input (or the next pedal in your signal chain) using another standard 1/4-inch instrument cable.
- Placering: Place the pedal on a stable surface or integrate it into your pedalboard.

Figur 2: Side view of the pedal, highlighting the 9V DC power input jack.

Figur 3: Øverst view of the pedal, showing the 'INPUT' and 'OUTPUT' jacks for signal connection.
3. Betjening af pedalen
The MXR Phase 90 is designed for straightforward operation with its single control knob.
Kontrolelementer:
- SPEED knap: 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.
- Fodkontakt: Press the footswitch to engage or bypass the effect. The red LED indicator will illuminate when the effect is active.
Brugstips:
- 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. Vedligeholdelse
Proper maintenance will ensure the longevity and optimal performance of your MXR Phase 90 pedal.
- Rensning: Brug en blød, tør klud til at rengøre pedalens yderside. Undgå slibende rengøringsmidler eller opløsningsmidler.
- Opbevaring: Opbevar pedalen et køligt, tørt sted væk fra direkte sollys og ekstreme temperaturer.
- Udskiftning af batteri: 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.
- Kabelforbindelser: Kontrollér regelmæssigt alle kabelforbindelser for tæthed, og sørg for, at kablerne ikke er flossede eller beskadigede.
5. Fejlfinding
If you encounter issues with your MXR Phase 90, refer to the following common troubleshooting steps:
- Ingen lyd:
- Sørg for, at alle kabler er korrekt tilsluttet til de korrekte input/output-stik.
- 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 amplifier to isolate the problem.
- 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.
- Uønsket støj:
- Ensure you are using a regulated 9V DC power supply if not using a battery.
- Tjek for jordsløjfer i din opsætning.
- Sørg for, at alle kabler er afskærmede og i god stand.
6. Specifikationer
| Feature | Specifikation |
|---|---|
| Modelnummer | M101 |
| Dimensioner (L x B x H) | 5.5 cm x 2.5 cm x 4.5 cm |
| Varens vægt | 1 pund |
| Strømkrav | 9V DC (single 9V battery or optional ECB003 AC Adapter) |
| Connector Type | 6.35mm (1/4") Jack Plug |
| Hardware-interface | 1/4-tommer lyd |
| Signalformat | Analog |
| Kropsmateriale | Metal, plastik |
| Farve | Orange |
| Først tilgængelig | 13. april 2004 |
7. Garanti og support
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.





