English Muff’n - Guitar amplifier Electro Harmonix - Free user manual and instructions
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| Product Type | Tube Guitar Preamp/Overdrive Pedal |
| Brand | Electro Harmonix |
| Model | English Muff'n |
| Power Supply | 9V DC (center negative) or 9V battery |
| Current Draw | 150 mA |
| Tube Type | 12AX7 |
| Input Impedance | 500 kΩ |
| Output Impedance | 10 kΩ |
| Controls | Volume, Tone, Sustain, Boost (footswitch) |
| LED Indicator | Yes, power/status |
| Dimensions | 4.5 x 2.5 x 1.5 inches (114 x 64 x 38 mm) |
| Weight | 0.5 kg (1.1 lbs) |
| Chassis Material | Aluminum |
| Input/Output Jacks | 1/4" TS (mono) |
| Power Jack | Standard 2.1 mm center negative |
| Battery Type | 9V alkaline (not included) |
| Maintenance | Wipe with dry cloth; avoid liquids |
| Cleaning | Unplug before cleaning; use soft dry cloth |
| Safety | Use only specified power supply; avoid moisture |
| Spare Parts | Replacement 12AX7 tube available from Electro Harmonix |
| Reparability | User-replaceable tube; other repairs by qualified technician |
| Warranty | 1 year limited |
| Country of Origin | USA |
Frequently Asked Questions - English Muff’n Electro Harmonix
What power supply should I use for the English Muff'n?
Use a 9V DC adapter with center negative polarity and at least 150 mA current. Alternatively, a 9V battery can be used.
How do I replace the tube in the English Muff'n?
Unplug the pedal, remove the bottom plate, gently pull out the old 12AX7 tube and insert a new one. Ensure the tube pins are aligned correctly. Reassemble the pedal.
Why is my English Muff'n making a humming noise?
Hum can be caused by a ground loop, nearby power supplies, or a weak tube. Try isolating the pedal, using a different power outlet, or replacing the tube.
Can I use the English Muff'n as a standalone amplifier?
No, the English Muff'n is a preamp/overdrive pedal. It needs to be connected to a guitar amplifier or a PA system to produce sound.
How do I clean the English Muff'n?
Unplug the pedal and wipe the exterior with a soft dry cloth. Do not use any liquids or abrasives.
What does the Boost footswitch do?
The Boost footswitch engages a volume boost for solos or louder sections. The amount of boost is set by the Volume knob when boost is active.
Is the English Muff'n true bypass?
Yes, the pedal features true bypass switching, ensuring no signal degradation when the effect is off.
What type of battery does the English Muff'n use?
It uses a standard 9V alkaline battery (not included). Battery life is approximately 5 hours depending on usage.
Can I daisy-chain power to the English Muff'n?
It is not recommended due to potential noise issues. Use a dedicated power supply or an isolated output on a power brick.
What is the warranty period for the English Muff'n?
Electro Harmonix offers a 1-year limited warranty from the date of purchase, covering defects in materials and workmanship.
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USER MANUAL English Muff’n Electro Harmonix
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Product information
Brand : Electro Harmonix
Model : English Muff’n
Category : Guitar amplifier