EHX Deluxe Bass Big Muff Pi User Guide
- June 6, 2024
- EHX
Table of Contents
EHX Deluxe Bass Big Muff Pi
Congratulations! You have just purchased the ultimate harmonic distortion- sustain device developed to date for the electric bass guitar player: the Deluxe Bass Big Muff Pi! We took our beloved Bass Big Muff Pi and carefully added select new features to create an even bigger sounding, more versatile bass distortion. Please review this manual to learn the unique potential of this pedal.
Features Include
- Big Muff Knob Layout – Sustain, Tone and Volume
- Crossover Filtering – further sculpt your distorted and dry tones
- Gate – remove unwanted hum
- Input Pad – accommodate active pickups
- Blend – control the mix between effect and dry signals
- DI Output – connect directly to mixing consoles and recording equipment
- Volume – obtain just the right balance between bypass and effect
- Buffered Bypass – high quality buffer with extended low frequency response
- Direct Output – outputs your buffered dry signal for secondary signal chain
The Deluxe Bass Big Muff draws its roots from the legendary Sovtek battle-tank green Big Muff Pi from the late ‘90s as well as from the original Electro- Harmonix Big Muff Pi from the early ‘70s. The Deluxe Bass Big Muff takes the best elements from both of these classics, employs sonic elements that were specifically designed for your bass and gives you even more tone-shaping options than ever before.
CONTROLS
VOLUME
Works as a master volume for the entire pedal and is capable of boosting the
input signal by 14dB above unity gain.
BLEND
This mixes between the dry and distorted signals. Turn this knob fully
counterclockwise for 100% dry signal and fully clockwise for 100% wet signal.
Setting the BLEND knob to noon yields a 50/50 mix of dry/distorted signal.
TONE
Provides a range of sounds from high treble to deep bass on the distorted
effect only. The overall tone filter frequencies were carefully chosen to
enhance your bass guitar. As you turn the TONE knob clockwise the treble
response of the Big Muff distortion increases.
SUSTAIN
As in the original Big Muff Pi, adjusts the amount of sustain and distortion.
GATE
Controls the input amplitude needed to open the noise gate. As you turn the
GATE knob clockwise, the amount of gating increases, requiring a louder signal
to open the gate and allow your instrument to pass through. Turning the GATE
knob down all the way disables the noise gate function.
HPF
When CROSSOVER is engaged the signal just prior to entering the distortion
circuit is sent through a second-order high pass filter. The HPF knob adjusts
the cutoff frequency range of the high pass filter from 125Hz to 1.75kHz, with
the frequency increasing as the knob is turned clockwise.
LPF
When CROSSOVER is engaged the dry signal is sent through a second-order low
pass filter. The LPF knob adjusts the cutoff frequency range of the low pass
filter from 60Hz to 10kHz, with the frequency increasing as the knob is turned
clockwise.
INPUT
This toggle switch engages 10dB of attenuation on the input to make the Deluxe
Bass Big Muff friendlier to basses with active pickups.
BYPASS FOOTSWITCH
Toggles between effect mode and a high quality buffered bypass. When the red
status LED is lit, the effect is active. When the LED is off, the Deluxe Bass
Big Muff Pi is in bypass mode.
CROSSOVER FOOTSWITCH
Turns the crossover circuit on and off. When the green status LED is lit, the
crossover circuit is active and the HPF and LPF knobs can be used to produce a
multitude of different tones.
I/O AND POWER CONNECTIONS
INPUT
Musical instrument input. Plug your instrument into here. The input impedance
presented at this jack is approximately 2M.
OUTPUT
This is the main output of the Deluxe Bass Big Muff Pi. Connect it to the
input of your amp or another effects pedal.
DIRECT OUT
This is a buffered output of the original bass signal. You can connect this
jack to an amplifier or different effects chain.
DI OUTPUT
Low impedance output capable of driving 600 so that you can plug directly into
a mixing console and recording equipment. This output’s signal is the same as
that of the OUTPUT jack.
9V POWER
The Deluxe Bass Big Muff Pi can run off of a 9V battery or you can use a 9VDC
battery eliminator capable of delivering at least 100mA to the 9V power jack.
The optional 9V power supply from Electro-Harmonix is 9.6DC-200BI (same as
used by Boss™ & Ibanez™) 9.6 Volts DC 200mA. The battery eliminator must have
a barrel connector with center negative. The battery may be left in or taken
out when using an eliminator.
OPERATION AND WARNINGS
To change the 9-volt battery, you must remove the 4 screws on the bottom of
the Deluxe Bass Big Muff Pi. 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.
To achieve its long sustain, the Deluxe Bass Big Muff Pi has very high maximum
gain. This requires that pickups and cables be well shielded and properly
grounded to avoid excessive hum when high sustain knob settings are used.
SAMPLE SETTINGS
USER SETTINGS
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 [email protected] 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, and RA#; and a copy of your receipt clearly showing the purchase date.
United States & Canada
EHX CUSTOMER SERVICE
ELECTRO-HARMONIX
c/o NEW SENSOR CORP.
47-50 33RD STREET
LONG ISLAND CITY, NY 11101
Tel: 718-937-8300
Email: [email protected]
Europe
JOHN WILLIAMS
ELECTRO-HARMONIX UK
13 CWMDONKIN TERRACE
SWANSEA SA2 0RQ
UNITED KINGDOM
Tel: +44 179 247 3258
Email:
[email protected]
This warranty gives a purchaser specific legal rights. A purchaser may have
even greater rights depending upon the laws of the jurisdiction within which
the product was purchased.
To hear demos on all EHX pedals visit us on the web at
www.ehx.com
Email us at [email protected]