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TABLE OF CONTENTS

1 Project Overview
2 Introduction & Usage
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
9 Licensing
2