multidrive
user manual
Introduction
In the studio, we’ve found that running multiple amps in parallel
really allowed us to get creative and complex tones that weren’t
possible with only one amp. The Multidrive was created with this
amp-stacking concept in mind. We think you’ll find the blend is
greater than the sum of the parts, in a way that would make
Aristotle proud!
The Multidrive represents a sonic Swiss Army knife. Our goal with
this pedal was to allow you the control to create your own unique
tone from a blend of three original sounding circuits.
To help you get the most out of this product, we’ve put up some
brief instructional videos on our website:
www.empresseffects.com
Thanks for purchasing the Empress Multidrive!
Enjoy,
Jason Fee
Lead Designer
The Basics of the Multidrive
The Empress Multidrive gives you fuzz, overdrive and distortion
circuits that can be run simultaneously, in parallel; their individual
outputs get blended together to create the final output. The gain
control on each section controls how distorted the section sounds,
and the volume control on each section controls how much of the
effect appears at the output.
Fuzz: A classic sounding circuit with loads of gain and sustain.
Blending this in will add great note definition to lead parts. On its
own it will give you that classic, bursting at the seams kind of sound.
Overdrive: A completely original circuit, this overdrive is designed
to give you a warm and smooth break-up that cleans up well with
changes in volume and attack, much like a tube preamp.
Distortion: This circuit uses a combination of BJTs, FETs, LEDs,
standard diodes, and opamps. It’s a little bit of gain from a lot of
different places. In the mild setting, it’s focused and is an excellent
complement to the overdrive. In the crunch setting, you get a thick,
well defined sound with really tight low end. In the lead setting, it
compresses and gets over the top.
Fuzz, Overdrive and Distortion Controls
Each section has a dedicated volume, gain and lter control.
This allows for an extremely wide range of sonic possibilities.
lter: engages a high pass lter (hp) or a low pass lter (lp)
for this section. This switch allows you to use only the high
frequencies of one section with only the low frequencies from
another section. For example: you could combine the tight
lows of the distortion section with the classic, high frequency,
sustain of the fuzz section. The cuto frequency is 500 Hz for
both the high-pass and low-pass lter settings.
+
Power: 9V DC negative tip 2.1mm jack.
110mA or greater
gain: controls the amount of break-up in each section.
volume: controls the amount of signal from each
section that gets added to the output. Think of this
as the volume fader on a mixer.
-
Controls at a Glance
distortion type: choose between 3 avors
available in the distortion section.
select: used to toggle between 2 preset combinations of
fuzz, overdrive and distortion. Choose which channels
are active in each preset using the dip switch located
inside the multidrive. LEDs indicate which channels are
active at any given time.
bypass: When the LED is shining, the multidrive eect
is applied to the signal. When o, the multidrive is
being bypassed (true bypass).
Master Section Controls
The fuzz, overdrive and distortion sections are summed
together in the master section. The master controls apply
to the combined signal and can be used to tailor the nal
sound that leaves the pedal.
mid freq: this switch allows you to select the center
frequency of the mid band of the master EQ.
hi: controls the amount of high frequency content in the
output signal. It is a gentle high shelf lter starting around
3 kHz. The 12 o’clock setting is 0 dB, no boost or cut, and
the extreme boost and cut is about 10 dB.
mid: allows you to add or subtract the frequency selected
with the mid freq switch. The 12 o’clock setting is 0 dB, no
boost or cut, and the extreme boost and cut is about 10 dB.
low: controls the amount of low frequency content in the
output signal. It is a low shelf lter starting around 150 Hz.
The 12 o’clock setting is 0 dB, no boost or cut, and the
extreme boost and cut is about 10 dB.
output: controls the output gain. The point
where unity gain is achieved varies and
depends on the individual section volumes.
Quick Start
Set the knobs and switches to match the picture above. If the blue
bypass LED is not already lit, press the bypass switch to engage the
Multidrive. If the red, yellow and green LEDs are not lit, press the
select switch to change states and engage all 3 channels. Now use
up the individual fuzz, overdrive and distortion volumes to blend
them to taste.
Configuring the Select Switch
The Multidrive allows you to toggle between two unique
combinations of the individual fuzz, overdrive and distortion
sections using the select switch. In each state you can combine one,
two, or all three sections together to create your own unique drive
sound.
To configure the settings, remove the back panel to access the
internal DIP switch. Here you can select which drive sections will be
turned on when toggling between state A and state B.
For example, with the DIP switch set as shown in the picture above,
the fuzz, overdive and distortion sections are on when the select
switch is set to state A. In state B, only the overdrive section is on.
Specifications
Input Impedance:
1MΩ
Output Impedance:
510Ω
Frequency Response (-3dB):
35Hz – 17kHz
Input Voltage:
9VDC-18VDC
Required Current:
Power Input Connector:
Height (enclosure only):
Height (including controls):
Length:
Width:
Weight:
120mA
2.1mm Barrel Connector
1.5”
2”
3.5”
4.5”
1lbs
*Noise and Distortion measurements are completely dependent on
the settings. Suffice it to say, the pedal is very quiet for the amount
of gain added.
www.empresseffects.com
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