Electro-Harmonix Ram`s Head Big Muff Pi User Manual

Ram’s Head Big Muff Pi

Congratulations on your purchase of the Ram’s Head Big Muff, a faithful reproduction
of the highly coveted 1973 Violet Ram’s Head Big Muff heard on countless classic
recordings and famous guitar solos. It delivers the unmistakable, articulate string
separation and exceptional sustain that’s made the V2 Big Muff so sought after. Now
with a few choice updates for convenience including true bypass switching, an LED to
indicate effect status and the option of being powered by a 9-volt AC adapter.

OPERATING INSTRUCTIONS

VOLUME Control – Sets the output level

TONE Control – Provides a range of sounds from high treble to deep bass. As you

turn the knob clockwise the treble increases and bass decreases.

SUSTAIN Control – Adjusts the amount of sustain and distortion.

Footswitch & Status LED – Use the footswitch to toggle between effect and

bypass. The Ram’s Head Big Muff is active when the LED is lit. When the LED is off,
the pedal is in true bypass mode.

IN Jack – Plug the output of your instrument or another effects pedal into the ¼”
input jack. The input impedance presented at this jack is 117kΩ.

OUT Jack – Connect the Ram’s Head Big Muff’s ¼” OUT jack to the input of your
amplifier or another effects pedal. When the Ram’s Head Big Muff is in bypass mode,
the OUT jack is connected directly to the IN jack. The output impedance is nominally
25kΩ.

POWER

Powering the Ram’s Head Big Muff Pi

The Ram’s Head Big Muff Pi may be powered from a 9V battery or an optional 9VDC
AC Adapter such as the EHX9.6DC-200 or any Boss
capable of delivering at least 30mA. Plug the output of the adapter into the 9V power
jack located at the top of the pedal. The battery may be left in or taken out when
using an AC Adapter. The current draw is approximately 2.0mA at 9VDC.

Please Note: Using the wrong adapter or a plug with the wrong polarity
may damage your Ram’s Head Muff Pi and void the warranty.

®

or Ibanez® style AC adapters

Changing the Battery

To change the 9V battery, remove the 4 screws on the bottom of the Ram’s Head Big
Muff Pi. Take off the bottom plate and change the battery. Avoid touching the circuit
board while the bottom plate is off. Replace the bottom plate and screws.

WARRANTY INFORMATION

Please register online at http://www.ehx.com/product-registration or complete and
return the enclosed warranty card within 10 days of purchase. Electro-Harmonix will
repair or replace, at its discretion, a product that fails to operate due to defects in
materials or workmanship for a period of one year from date of purchase. This
applies only to original purchasers who have bought their product from an authorized
Electro-Harmonix retailer. Repaired or replaced units will then be warranted for the
unexpired portion of the original warranty term.

If you should need to return your unit for service within the warranty period, please
contact the appropriate office listed below. Customers outside the regions listed
below, please contact EHX Customer Service for information on warranty repairs at
[e-mail] or [phone]. USA and Canadian customers: please obtain a
Return Authorization Number (RA#) from EHX Customer Service before returning
your product. Include  with your returned unit  a written description of the problem
as well as your name, address, telephone number, e-mail address, RA# and a copy of
your receipt clearly showing the purchase date.

United States & Canada Europe

EHX CUSTOMER SERVICE JOHN WILLIAMS
ELECTRO-HARMONIX ELECTRO-HARMONIX UK
c/o NEW SENSOR CORP. 13 CWMDONKIN TERRACE
55-01 2ND STREET SWANSEA SA2 0RQ
LONG ISLAND CITY, NY 11101 UNITED KINGDOM

Tel: [phone] Tel: [phone]
Email: [e-mail] Email:

The CE logo indicates that this product has been tested and shown to conform with all
applicable European Conformity directives.

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