StewMac TWO KINGS BOOST DOUBLE-POWERED ROYAL TONE Manual

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TWO KINGS BOOST
DOUBLE-POWERED ROYAL TONE
INSTRUCTION GUIDE

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BASED ON THE ANALOGMAN KING OF TONE
FIRST TIME BUILDING A PEDAL? Kick back and watch our 4-part
series where we show you the basics of pedal building. Even if
you’re a complete beginner don’t worry! We go over everything
from unboxing, to choosing the right soldering iron, to making
every connection. We also give tips on painting your pedal.
Visit: stewmac.com/pedal-build
Another Analogman tweaked circuit, the origin of this kit is rooted in the Marshall Blues Breaker overdrive, a fairly inexpensive
pedal when introduced that is now fetching high prices because of the hype surrounding this pedal on the internet.
Analogman re-thought the Blues Breaker circuit and souped it up to suit what he thought it should be, then packed two into a
single enclosure called the King of Tone.
In addition to the surface controls, each side can be independently set via internal DIP switches to Overdrive (normal) which
is a lower gain drive sound. Clean Boost, which functions as a clean boost with just a hair of gain. And Distortion mode, which
is capable of achieving higher gain distorted sounds. Both sides can be set dierently for a wide variety of tones when used
independently and/or together. Players will often set one side hotter than the other as a lead boost of sorts, or for additional
tonal textures.
The King of Tone is still available but is subject to insane lead times due to its popularity. As of 1/22, Analogman is shipping KoT
pedals ordered on 10/17. As a result, these usually fetch more than twice
the original purchase price if found available for sale online.

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Soldering Iron #0502
Solder Wick #0504
Solder #0505
Wire Cutter #1607
Long-Nose Pliers #1610
Fine-Gauge Wire
Stripper #1606
Guitar Tech
Wrench Set #3691
or nut drivers/sockets
PC Board Holder #0500
TOOLS AND SUPPLIES
REQUIRED OR RECOMMENDED
Not pictured: #1 Phillips screwdriver,
and supplies to paint your pedal, clear
silicone adhesive, spray nish.
Power: Model 12251 requires a
standard 9V DC center-negative
power supply (not included) and
consumes less than 100mA.

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Magnifying glass or
OptiVISOR #1685
Multimeter PM16B #3607
Our Pedal BuildingTool Set #2318 is the
perfect companion for new pedal builders
who do not already have a lot of tools and supplies.
TOOLS AND SUPPLIES
HELPFUL
Soldering Aids #0521

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We know you are excited to get started building.
That said, one of the keys to a successful build, is
taking the time to get to know all of your parts. Sort
all of your pedal’s parts and check o according to the
parts lists that follow. If you are not familiar with what
they do, the next section will give you a little primer.
Blue Gray Black Brown Brown
6.8K resistor (4) #100701
Brown Black Black Brown Brown
1K resistor (4) #7357
Yellow Violet Black Brown Brown
4.7K resistor (2) #7359
Brown Black Black Red Brown
10K resistor (2) #7362
Red Violet Black Red Brown
27K resistor (2) #7398
Yellow Violet Black Red Brown
47K resistor (2) #7369
Brown Black Black Yellow Brown
1M resistor (6) #7367
Orange Orange Black Red Brown
33K resistor (2) #7409
Red Red Black Orange Brown
220K resistor (2) #7381
Brown Black Black Orange Brown
100K resistor (2) #7365
PARTS LIST
Note: While electrical properties
remain the same, the appearance of
parts may vary based on availability. If you
are ever unsure, please contact us via the
information on the back of this manual.

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100µF capacitor (1)
#7312
100uF
10µF capacitor (3)
#7310
10uF
1µF capacitor (2)
#7314
1uF
.1µF capacitor (2)
#7304
.1J63
10nF capacitor (8)
#7331
1µF capacitor (2)
#7308
1J63
WIMA
0,01
100-
1N5817 rectifier diode (3)
#7522
1N914 rectifier diode (8)
#7521
ON
22nF capacitor (2)
#7332
50K trim pot (2)
#100739
503 0D
1N4001(1S1588) rectifier diode (4)
#101259
100pF capacitor (2)
#100721
WIMA
0,022
100-
PARTS LIST CONT

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Red LED (1)
#7421
White LED (1)
#7422
5mm LED mounting bezel (2)
#7432
8-pin DIP switch (1)
#100779
3PDT latching footswitch (1)
#1611
Adhesive foam tape squares (4)
#7560
B25K linear taper pot (2)
#7461
A100K linear taper pot (2)
#7455
B100K Linear taper pot (2)
#7453
Control knobs (6)
#7501
TC1044 SCPA voltage regulator (1)
#100732
JRC 45880D op-amp (2)
#100733
Integrated circuit socket (3)
#7484
PARTS LIST CONT

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PCB and breakout board (1)
Sticker sheet (1)
Pre-drilled enclosure (1) #7668/#7668-W
24" of lead wire - 22 gauge (1)
#5960
1/4" mono jack (1)
#4652
1/4" Stereo jack (1)
#4653
2.1mm DC power connector (1)
#7467
Battery clip (1)
#1225
2.1mm DC power connector (1)
#7468 (Only for kit #12251)
(Only for kit #12255)
(Only for kit #12255) (Only for Kit #12255)
(Two for Kit #12251)
PARTS LIST CONT

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1. To minimize redoing steps, make
sure you have a solid idea of the
look and feel you’re going for.
2. Lightly sand housing with a
P240 grit sandpaper and wipe
clean any debris.
3. Cover the holes from the
inside with masking tape.
4. On a large piece of cardboard,
elevate the housing top and
bottom on a couple of small blocks
of wood.
5. With long, slow strokes, spray
one light coat of primer or primer/
paint on top and bottom. Allow
45 minutes of drying time
between next two to three coats.
6. If you’re using primer followed
by paint method, paint 3 coats
with 45 minutes between coats.
7. Now, add your 2 Kings Boost
sticker and any other
desired decoration
(paint pens, acrylic
paint, Sharpie etc.).
Allow drying time.
8. Add 3 coats of clear coat glaze
with 45 minutes between
coats. Wait at least 2 hours
before adding parts.
Give your pedal a custom paint job by painting and adding the stickers provided in this kit
(or custom decals that you can create on your own). Doing this pre-build is not only fun,
but it’s much easier than disassembling the pedal to paint it once you put it together. Don’t
forget to order quality primer and lacquers from stewmac.com. PAINTING
YOUR PEDAL
HOUSING
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present, it’s always one of the last colors in the code. If
you’re having trouble reading the color bands, try using
a multimeter to read a resistor’s value. Just set your
multimeter to ohms and connect the test leads on each
side of the resistor.
A number of dierent components are used to make an
eects pedal. Here’s an overview of what they do..
RESISTORS
A resistor is used in an electrical circuit to present an
opposition to current ow. It resists the amount of
current that can pass through it.
A resistor’s value—the amount of resistance it creates—
is rated in ohms (). The higher the ohmic value, the
greater the resistance to this ow of current. For
example, a 100 resistor creates ten times as much
resistance as a 10 resistor.
Resistor values are indicated by colored bands, read from
left to right. The rst color in the code is usually the one
painted closest to a lead. When a gold or silver band is
UNDERSTANDING ELECTRONIC
COMPONENTS
4.7KΩ ±1%
K=1,000
Band 1 Band 2 Band 3 Multiplier Tolerance
4 7 0 x10 ±1% =5-band code:
4-band code: read Bands 1 and 2 same as above, then
Band 3 is the Multiplier and Band 4 is the Tolerance.
BLACK 0 0 0 1
BROWN 1 1 1 10 +/- 1%
RED 2 2 2 100 +/- 2%
ORANGE 3 3 3 1,000
YELLOW 4 4 4 10,000
GREEN 5 5 5 100,000 +/- 0.5%
BLUE 6 6 6 1,000,000 +/- 0.25%
VIOLET 7 7 7 10,000,000 +/- 0.10%
GRAY 8 8 8 100,000,000 +/- 0.05%
WHITE 9 9 9
1,000,000,000
GOLD 0.1 +/- 5%
SILVER 0.01 +/- 10%
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Resistors and capacitors may also be referred to with
shorthand notation on the printed circuit board when
there is a decimal in the value. For example, the place
on the board for the 4.7K resistor will read 4K7 and the
spot for a 2.2nF capacitor will read 2n2. This is done to
save space on the board and make the labels as clear
as possible.
Some capacitors have polarity and some don’t. It’s
extremely important to install polarized caps correctly
in a circuit. The negative lead will often be indicated
by a band of arrows pointing to the negative lead and
will be shorter than the positive lead. The positive lead
of an electrolytic cap will be longer and won’t have
any arrows pointing to it.
Installing capacitors with the polarity backwards will
make the circuit malfunction and quickly destroy the
capacitor— even causing it to explode.
CAPACITORS
The two main uses of capacitors are to store electricity
and to block the ow of DC current.
Capacitor values are typically printed on the
component. The key values with caps are their voltage
and capacitance.
The voltage spec for a cap refers to how much DC
voltage it can handle at any given time. If this rating is
exceeded, the capacitor will fail.
Capacitance, measured in farads, refers to how
much electricity a capacitor can hold. One farad (1F)
would be much too large for use in a pedal. Caps
for pedals are rated between millionths of a farad,
called microfarads (F), billionths of a farad, called
nanofarads (nF), or trillionths of a farad: picofarads
(pF). .001μF = 1nF = 1,000pF.
++
10 11
1
0
1
J
1
00V
1
02J
1u F
.1J63

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INTEGRATED CIRCUITS
Integrated circuits are
complex, tiny, self-contained
collections of components
that contain a complete
circuit. Op-amps, audio
processors, and linear
voltage regulators are three
kinds of integrated circuits.
INPUT JACKS
Pedal kits without battery
capability use a two
terminal mono input
jack. If your kit has battery
capability, your input jack will be
a stereo jack, with three terminals.
The third terminal puts the
battery into the circuit
and acts as a power
switch when you plug in
your guitar.
UNDERSTANDING ELECTRONIC
COMPONENTS CONT
DIODES
Diodes are used where you want electricity to ow in
only one direction, such as power rectication, and
also to limit how much current can ow, to create
“clipping” distortion.
Diodes are also polarized, so they need to be installed
in the correct orientation. The stripe around one end
marks the negative (minus) lead of the diode. On the
circuit board, the printed outline of the diodes also
shows this stripe. Install each diode so that its stripe
matches the direction shown on the circuit board.
2n2J630
TL072
PT2399
PT2399
PT2399
PT2399
echo audio
processor (1) #7490
TL072CP TL072CP
low noise
op-amp (1) #7444
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POTENTIOMETER
A potentiometer, or pot, is a variable
resistor. This means as the knob shaft is
rotated, the DC resistance will change.
There are three lugs or soldering
terminals on a conventional
potentiometer. The outside two
are the ends of the resistive strip,
and the center lug is connected
to the “sweeper.”The sweeper
allows you to vary the DC resistance
relative to its position along the
resistive strip, or relative to the outer two lugs.
Potentiometers come in two
varieties, linear-taper and
audio-taper. The linear-
taper pot’s taper works at a
1:1 ratio. Audio taper, has a
special logarithmic ratio.
Audio taper is used because
our ears don’t hear
changes in volume in a linear fashion as you might
expect. As the volume increases, a greater change
in signal or sound-pressure is required to perceive a
smooth transition.
LED
LED stands for Light Emitting Diode,
and functionally LEDs are very similar
to regular diodes. LEDs are most often
used as indicator lights in pedals. They are
polarized just like diodes and electrolytic
capacitors and must be installed in the
correct orientation to work. The positive
(anode) lead of the LED will be longer and
the anode side of the LED housing will
be round. The negative (cathode) lead of
the LED will be shorter and the cathode
side of the LED housing will be at. LEDs
are mounted inside of a bezel, which
protects the LED and insulates the leads
from shorting against the enclosure or any
internal components.
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The solder joints you’ll make on the circuit boards
are very small, and too much heat can damage the
board. The idea is to make joints quickly, without scorching the holes.
SOLDERING Here’s a few more
soldering tips that
might be helpful:
• Keep your soldering tip
clean by wiping it often on
a damp sponge.
• Also keep it tinned by
occasionally melting a little
solder onto it.
• Don’t blow on the hot
solder or touch anything
until the joint has cooled
completely. A good solder
joint is shiny – a sign that it
was left to cool undisturbed.
• Plan so each joint is only
soldered once. Resoldered
joints are messy and more
likely to fail.
1. Hold components in place for soldering by
threading the leads through the board and bending
them apart on the reverse side. You will be making
your solder joints on the reverse side of the board.
2. Tin the iron by melting a
small amount of solder onto
the tip of the iron.
3. Insert the tip into the hole and let it heat for 4-5
seconds before touching it with solder. This heats the
contact enough for the solder to ow nicely without
damage. Feed the solder to the hole, not the iron, and
you don’t need much solder, just enough to ll the
hole. Keep the iron on the connection for a second
longer; this pause gives time for all of the ux to cook
out of the joint. After the joint has cooled, trim away
the excess lead wire.
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ON ON ON ON ON ON ON ON
1N5817 rectifier diode (3)
#7522
1N914 rectifier diode (8)
#7521
ON
1N4001(1S1588) rectifier diode (4)
#101259
Free the printed circuit board (PCB) and breakout board from the frame by cutting the small
tabs with a string cutter or side cutter. Insert the diode leads through the component side
(the side with the components’values and outlines silkscreened in white). In many cases,
components must be inserted in a specic direction due to polarity, so follow the graphics
carefully. For example, diodes are polarized, so they must be installed in the correct orientation.
Solder the diodes on the opposite side of the board, known as the component side.
INSTALL 15
DIODES
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Note the stripe around
one end of the diode.This
marks the negative (minus) lead.
On the PCB, the printed outline of
the diodes also shows this stripe.
Install each diode to match the
direction shown. Place all diodes
with the wires pointing down,
through the component side.

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47K resistor (2) #7369
Yellow Violet Black Red Brown
6.8K resistor (4) #100701
Blue Gray Black Brown Brown
4.7K resistor (2) #7359
Yellow Violet Black Brown Brown
10K resistor (2) #7362
Brown Black Black Red Brown
1K resistor (2) #7357
Brown Black Black Brown Brown
Next, we’re going to add a bunch of resisitors to our PCB. Like in the previous step, you’ll
nd an outline of each resistor and its value printed in their proper location on the PCB.
Resistors are not polarized, so it doesn’t matter which lead goes in which hole. Match
resistors to the values on the PCB, a few at a time, and solder in place. Clip the leads close
to the board, but not touching the board so you don’t damage the solder pads.
INSTALL 26
RESISTORS
33

17
1K resistor (2) #7357
Brown Black Black Brown Brown
Brown Black Black Orange Brown
100K resistor (2) #7365
OR
Install two more resistors – either 1k (stock Analogman
setup) or 100k. For higher gain, install two 100K resistors.
OPTIONAL
MODIFICATION
It’s a great practice to always check your resistors on a multimeter to be sure they
display the correct ohms before installing. In rare cases, a resistor might be labeled
incorrectly or could be an open circuit and you wouldn’t want to nd that out post install!
This resistor is for the right side footswitch when the
pedal is face up in normal operating mode.
This resistor is for the left side footswitch when the
pedal is face up in normal operating mode.
The right side
footswitch will
engage this resistor.
The left side
footswitch will
engage this resistor.

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1M resistor (6) #7367
Brown Black Black Yellow Brown
220K resistor (2) #7381
Red Red Black Orange Brown 27K resistor (2) #7398
Red Violet Black Red Brown
33K resistor (2) #7409
Orange Orange Black Red Brown
INSTALL 26
RESISTORS
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Installing low prole components
that sit closer to the board
now, will make installing taller
components easier later on. 101J
100V
100uF

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INSTALL 2
TRIM POTS
503 0D 503 0D
50K trim pot (2)
#100739
503 0D
44
Each side of the pedal has its own gain, tone, and volume controls. In addition, the internal trim
pot allows the user to adjust the high frequency response. This control is labeled “presence”
and impacts the higher harmonics. This is useful when the player wants to take a bit of “the
sharp edge”o the overall tone without dramatically changing the overall character. Much like
the presence control in a guitar amp, it is very useful for subtle high frequency shaping.
Carefully insert the legs of the trim pots into the PCB and solder in
place on the back of the PCB.
Use a phillips head screwdriver to adjust the high end frequency.
Turn it to the right for more high end, to the left to remove high end.
503 0D 503 0D
50K trim pot (2)
#100739
503 0D
this trim pot
controls the right
side footswitch
this trim pot
controls the left
side footswitch

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INSTALL
THE DIP
SWITCH
8-pin DIP switch (1)
#100779
55
The DIP switch you’re about to install allows the user to customize tone
when its four switches are arranged in dierent combinations. The four
switches engage two dierent groups of diodes that aect not only the
overall distortion type, but also the sustain and response to pick attack
of the pedal. You can choose between the Clean Boost, Overdrive, and
Distortion settings for each side of the pedal.
Install the 4 position DIP switch as shown in the
diagram, with the numbers 1, 2, 3, 4, towards the
bottom of the circuit board. Carefully insert the legs of
the DIP switch into the PCB and solder in place on the
back of the PCB.
Switches 1 and 2 will be activated by the footswitch
on the right (red LED) side of the pedal and 3 and 4
activated by the footswitch on left (white LED) side.
When we reach step 23, we’ll further explain how to
adjust and ne tune the DIP switches and the trim pots.
This will help you experiment with various settings to
capture the kind of tone that feels right for you.