Electro Harmonix Op-Amp Big Muff Pi Manual

Electro Harmonix Ikke kategoriseret Op-Amp Big Muff Pi

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Side 1/2

Op-Amp Big Muff Pi

Congratulations on your purchase of the Op-Amp Big Muff, our faithful re-creation of

the late ‘70s circuit. The circuitry of the Op-Amp Big Muff – sometimes also referred

to as the IC or V4 Big Muff – differs from the traditional transistor-based Big Muff

circuit in that it uses operational amplifiers (op-amps) to achieve its signature

sustaining distortion sound. With widely-sweeping tone controls and a character all

its own, the Op-Amp Big Muff will surely be a formidable addition to your sonic

arsenal.

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.

TONE Switch – Removes the TONE control from the circuit. This switch has been

improved over the original Op-Amp Big Muff in that the volume remains the same in

both positions.

FUZZ Control – Adjusts the amount of sustain and distortion

Footswitch & Status LED – When the LED is lit, the Big Muff effect is active. When

the LED is off, the Big Muff is in true bypass mode. The Footswitch toggles between

effect and bypass modes.

INPUT Jack – This ¼” jack is the audio input to the Op-Amp Big Muff. The input

impedance presented at this jack is 55 kΩ.

AMP Jack – This ¼” jack is the audio output from the Op-Amp Big Muff. When the

Big Muff is in bypass mode, the AMP jack is connected directly to the INPUT jack.

9V Power Jack – The Op-Amp Big Muff is powered from a 9V battery or you can

use an optional 9VDC AC Adapter capable of delivering at least 25mA to the 9V power

jack, such as the EHX9.6DC-200. The AC Adapter must have a center negative plug.

The battery may be left in or taken out when using an AC Adapter. The Op-Amp Big

Muff has a current draw of approximately 5mA at 9VDC.

We recommend the Electro-Harmonix US96DC-200BI AC Adapter to power

your Op-Amp Big Muff.

CHANGING THE BATTERY

To change the 9-volt battery, you must remove the 4 screws on the bottom of the

Op-Amp Big Muff. Once the screws are removed, you can take off the bottom plate

and change the battery. Please do not touch the circuit board while the bottom plate

is off or you risk damaging a component.

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

info@ehx.com or +1-718-937-8300. 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

47-50 33RD STREET SWANSEA SA2 0RQ

LONG ISLAND CITY, NY 11101 UNITED KINGDOM

Tel: 718-937-8300 Tel: +44 179 247 3258

Email: info@ehx.com Email: electroharmonixuk@virginmedia.com

Produkt Specifikationer

Mærke:	Electro Harmonix
Kategori:	Ikke kategoriseret
Model:	Op-Amp Big Muff Pi

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