aion LUMIN User manual

LUMIN SONIC ENHANCER 1
PROJECT NAME
LUMIN
BASED ON
EFFECT TYPE
PROJECT SUMMARY
DOCUMENT VERSION
BBE Sonic Stomp
A unique tone-shaping tool that allows you to enhance the clarity of your signal by phase-correcting the
low, mid and high frequencies separately.
EQ / Sonic Enhancer 1.0.3 (2021-04-28)
Actual size is 2.3” x 1.86” (main board) and 1.78” x 0.86” (bypass board).
BUILD DIFFICULTY
Easy

LUMIN SONIC ENHANCER 2
TABLE OF CONTENTS
1Project Overview 7Enclosure Layout
2Introduction & Usage 8Wiring Diagram
3-4 Parts List 9Licensing
5Schematic 9Document Revisions
6Drill Template
INTRODUCTION
The Lumin Sonic Enhancer is a work-alike of the BBE Sonic Stomp, the single-channel stompbox version
of the rackmounted Sonic Maximizer first released in the late 1980s. Its sound is often described as like
taking a blanket off your speaker. It adds clarity and definition to your tone and can be adjusted to suit a
wide variety of rigs and settings.
Categorically speaking, it’s an EQ pedal, but one that primarily affects the frequencies above and below
the range of normal EQ pedals. Its purpose is less about changing the voice of the instrument and more
about changing its relationship to the overall mix.
The original unit uses a proprietary analog IC manufactured by New Japan Radio that contains the core
of the circuit. The Lumin is a reverse-engineered expansion of the circuit on that chip, but it should be
stressed that it is not a clone, because the chip implementation is patented. A midrange knob has been
added along with switches to set the frequencies of the Process and Contour knobs.
The updated 125B version of the Lumin adds some additional power filtering on the ICs, but otherwise
nothing has been changed from the older 1590B version.
USAGE
The Lumin has the following controls:
• Contour adjusts the phase response of the split signal below the frequency set by the Lo Frequency
toggle (low pass).
• Process adjusts the phase response of the split signal above the frequency set by the Hi Frequency
toggle (high pass). This is similar to a “presence” control often seen in professional audio equipment.
• Midrange adjusts the phase response of the split signal between the low and high frequencies
(bandpass).
• Hi Frequency (toggle switch) changes the frequency at which the “Process” knob operates. The
default frequencies are 10 kHz (center position), 7.3 kHz (up), and 5.1 kHz (down).
• Low Frequency (toggle switch) changes the frequency at which the “Contour” knob operates. The
default frequencies are 50 Hz (down position), 74 Hz (up), and 105 Hz (center).

LUMIN SONIC ENHANCER 3
PARTS LIST
This parts list is also available in a spreadsheet format which can be imported directly into Mouser for
easy parts ordering. Mouser doesn’t carry all the parts (most notably potentiometers) so the second tab
lists all the non-Mouser parts as well as sources for each.
View parts list spreadsheet →
PART VALUE TYPE NOTES
R1 1k Metal film resistor, 1/4W
R3 1M Metal film resistor, 1/4W
R4 1k Metal film resistor, 1/4W
R5 1k Metal film resistor, 1/4W
R6 1M Metal film resistor, 1/4W
R7 22k Metal film resistor, 1/4W
R8 22k Metal film resistor, 1/4W
R9 22k Metal film resistor, 1/4W
R10 10k Metal film resistor, 1/4W
R11 22k Metal film resistor, 1/4W
R12 22k Metal film resistor, 1/4W
R13 22k Metal film resistor, 1/4W
R14 22k Metal film resistor, 1/4W
R15 15k Metal film resistor, 1/4W
R16 10k Metal film resistor, 1/4W
R17 62k Metal film resistor, 1/4W
R18 100k Metal film resistor, 1/4W
R19 1k Metal film resistor, 1/4W
R20 47k Metal film resistor, 1/4W
R21 47k Metal film resistor, 1/4W
RPD 2M2 Metal film resistor, 1/4W Input pulldown resistor.
LEDR 4k7 Metal film resistor, 1/4W LED current-limiting resistor.
C1 100pF MLCC capacitor, NP0/C0G
C2 4n7 Film capacitor, 7.2 x 2.5mm
C3 10uF Electrolytic capacitor, 5mm
C4 2n7 Film capacitor, 7.2 x 2.5mm
C5 2n2 Film capacitor, 7.2 x 2.5mm See build notes for details on modifications.
C6 6n8 Film capacitor, 7.2 x 2.5mm See build notes for details on modifications.
C7 18n Film capacitor, 7.2 x 2.5mm
C8 15n Film capacitor, 7.2 x 2.5mm See build notes for details on modifications.

LUMIN SONIC ENHANCER 4
PARTS LIST, CONT.
PART VALUE TYPE NOTES
C9 56n Film capacitor, 7.2 x 2.5mm See build notes for details on modifications.
C10 100pF MLCC capacitor, NP0/C0G
C11 10uF Electrolytic capacitor, 5mm
C12 100uF Electrolytic capacitor, 6.3mm Power supply filter capacitor.
C13 100uF Electrolytic capacitor, 6.3mm Reference voltage filter capacitor.
C14 100n MLCC capacitor, X7R Power supply filter capacitor.
C15 100n MLCC capacitor, X7R Power supply filter capacitor. (IC1)
C16 100n MLCC capacitor, X7R Power supply filter capacitor. (IC2)
C17 100n MLCC capacitor, X7R Power supply filter capacitor. (IC3)
D1 1N5817 Schottky diode, DO-41
IC1 TL072 Operational amplifier, DIP8
IC1-S DIP-8 socket IC socket, DIP-8
IC2 TL072 Operational amplifier, DIP8
IC2-S DIP-8 socket IC socket, DIP-8
IC3 TL072 Operational amplifier, DIP8
IC3-S DIP-8 socket IC socket, DIP-8
CONT. 50kB 16mm right-angle PCB mount pot
PROC. 50kB 16mm right-angle PCB mount pot
MID 50kB 16mm right-angle PCB mount pot
L.FREQ SPDT cntr off Toggle switch, SPDT on-off-on
H.FREQ SPDT cntr off Toggle switch, SPDT on-off-on
IN 1/4" stereo 1/4" phone jack, closed frame Switchcraft 112BX or equivalent.
OUT 1/4" mono 1/4" phone jack, closed frame Switchcraft 111X or equivalent.
DC 2.1mm DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent.
BATT Battery snap 9V battery snap Optional. Use the soft plastic type—the hard-shell type will not fit.
FSW 3PDT Stomp switch, 3PDT
ENC 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1.

LUMIN SONIC ENHANCER 5
BUILD NOTES
Basic theory
The legendary “BBE process” is a textbook usage of something called a state variable filter. The signal is
split into three parts (low, medium and high) that can be controlled & modified separately before being
mixed back together. The idea is that it phase-corrects the frequencies before they are amplified and
sent to the speakers and this results in optimized speaker performance.
Unity gain, at response
The baseline setting for the Lumin is as follows: Midrange 12:00, Contour 8:00, Process 8:00, Low
Frequency toggle in the down position (50 Hz), Hi Frequency toggle in the center position (10kHz).
There is a very slight roll-off above the high frequency and below the low frequency, but otherwise the
effect signal should be indistinguishable from the bypass signal.
Midrange knob
The midrange is a bandpass filter, so it controls all the frequencies in between the high and low settings.
It is highly interactive with the Contour and Process controls. The higher those knobs are set, the less
of an impact the midrange knob will have, controlling a narrower frequency band. Conversely, if those
knobs are turned all the way down, the midrange knob will affect a very wide frequency spectrum and
act almost as a level control.
Adjusting the frequencies
If you follow the parts list, the frequencies of the toggle switches are those shown at the bottom of
page 2. These settings can be adjusted by changing C4/C5/C6 (high frequencies) and C7/C8/C9 (low
frequencies). For each of the six positions, the capacitor value can be reduced to raise the frequency, or
increased to lower the frequency.
Hi Frequency switch
This sets the frequency for the Process control.
• C4: 2n7 (10kHz). This capacitor is always engaged, so it adds to the value of C5 or C6 in the other
two settings and will impact their frequencies if it is changed.
• C5: 2n2 (7.3kHz). Added to C4 when engaged.
• C6: 6n8 (5.1kHz). Added to C4 when engaged.
Low Frequency switch
This sets the frequency for the Contour control.
• C7: 18n (105 Hz). This capacitor is always engaged, so it adds to the value of C8 or C9 in the other
two settings and will impact their frequencies if it is changed.
• C8: 15n (74 Hz). Added to C7 when engaged.
• C9: 56n (50 Hz). Added to C7 when engaged.

SCHEMATIC
LUMIN SONIC ENHANCER 6
GND
2M2
1N5817
100uF
GND
+9V
100n
VA
TL072P
TL072P
1k
1M
1k
1k
1M
22k
22k
22k
10k
22k
22k
22k
22k
15k
10k
62k
100k
1k
47k
47k
100uF
100pF
4n7
2n7
18n
100pF
GND
GNDGND
GND
50kB
50kB
VB
VB
VB
VB
VB
VB
VB
50kB
2n2
6n8 15n
56n
TL072P
TL072P
TL072P
TL072P
VA
GND
VA
GND
VA
GND
10uF 10uF
100n 100n 100n
VA
GND
RPD
D1
C12
IN
OUT
C14
2
3
1
IC1A
6
5
7
IC1B
84
R1
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
C13
C1
C2
C4
C7
C10
CONTOUR
1
2
3
PROCESS
1
2
3
MID
1
2
3
C5
C6 C8
C9
2
3
1
IC2A
6
5
7
IC2B
2
3
1
IC3A
6
5
7
IC3B
84
84
C3 C11
HIFREQ
2
3
1
LOFREQ
2
3
1
C15 C16 C17
GND

LUMIN SONIC ENHANCER 7
DRILL TEMPLATE
Cut out this drill template, fold the edges and tape it to the enclosure. Before drilling, it’s recommended
to first use a center punch for each of the holes to help guide the drill bit.
Ensure that this template is printed at 100% or “Actual Size”. You can double-check this by measuring
the scale on the printed page.
Top jack layout assumes the use of closed-frame jacks like the Switchcraft 111X. If you’d rather use
open-frame jacks, please refer to the Open-Frame Jack Drill Template for the top side.
LED hole drill size assumes the use of a 5mm LED bezel, available from several parts suppliers. Adjust
size accordingly if using something different, such as a 3mm bezel, a plastic bezel, or just a plain LED.
0 1 2
CM
0 1
INCH
x: -0.65, y: +1.71 x: 0.65, y: +1.71
ø9/32” ø9/32”
x: -0.85, y: +0.66
ø1/4”
x: 0, y: +0.66
ø9/32”
x: 0, y: -1.20
ø15/32”
x: -0.775, y: -1.20
ø5/16”
CENTER (0,0)
ø3/8” ø1/2”
0.385”
0.625” 0.625”
ø3/8”
OUT DC IN
125B
CONTOUR
LOW FREQ HIGH FREQMIDRANGE
PROCESS
FOOTSWITCHLED
x: +0.85, y: +0.66
ø1/4”

LUMIN SONIC ENHANCER 8
ENCLOSURE LAYOUT
Enclosure is shown without jacks. See next page for jack layout and wiring.
125B

LUMIN SONIC ENHANCER 9
WIRING DIAGRAM
125B
IN +VGND N.C. N.C. OUT
PCB
IN
GND +V +V JACK GND JACK
OUTIN
GND GND PCB
OUT
Shown with optional 9V battery. If battery is omitted, both jacks can be mono rather than one being stereo.
Leave the far-right lug of the DC jack unconnected.

LUMIN SONIC ENHANCER 10
LICENSE & USAGE
No direct support is offered for these projects beyond the provided documentation. It’s assumed
that you have at least some experience building pedals before starting one of these. Replacements and
refunds cannot be offered unless it can be shown that the circuit or documentation are in error.
All of these circuits have been tested in good faith in their base configurations. However, not all the
modifications or variations have necessarily been tested. These are offered only as suggestions based
on the experience and opinions of others.
Projects may be used for commercial endeavors in any quantity unless specifically noted. No
attribution is necessary, though a link back is always greatly appreciated. The only usage restrictions
are that (1) you cannot resell the PCB as part of a kit without prior arrangement, and (2) you cannot
“goop” the circuit, scratch off the screenprint, or otherwise obfuscate the circuit to disguise its source.
(In other words: you don’t have to go out of your way to advertise the fact that you use these PCBs, but
please don’t go out of your way to hide it. The guitar effects industry needs more transparency, not less!)
DOCUMENT REVISIONS
1.0.3 (2021-04-28)
Updated recommended frequency capacitors for better flexibility, and revised build notes with more
detailed information. No PCB revisions.
1.0.2 (2020-10-16)
Added missing RPD and LEDR to parts list.
1.0.1 (2019-11-21)
Added note about changing R17 to get closer to unity gain.
1.0.0 (2019-03-03)
Initial release.