CopperSound Substitution Box Electrolytic Capacitor

A Substitution Box designed for DIY prototyping, within a modular range

This "Electrolytic Capacitor" version is part of a series of Coppersound substitution boxes dedicated to prototyping. The principle is simple: gather a selection of common values in a practical format to iterate faster, compare more precisely, and validate a schematic before final assembly.

For whom and for which audio applications?

This substitution box is aimed at designers and DIY audio enthusiasts: pedal builders, technicians, students, makers, and hobbyists who want to optimize a circuit without wasting time swapping components. It facilitates testing values of electrolytic capacitors on a breadboard by assessing their impact on response, noise, and dynamics of a setup.

Immediate operation to compare values without interrupting your workflow

Instead of constantly removing and replacing parts, you insert wires at the desired points and instantly experiment with different values. This approach makes comparisons faster and more reliable, especially when seeking the right balance between filtering, bass retention, and power supply stability.

Technical specifications

Effects	Preamp	Color	Black
Use	electric guitar

Type	DIY substitution box	Voltage	25 V
Function	real-time component value selection	Resistors	24 values, from 10 ohms to 1 megaohm (1/4 W)
Usage	wire insertion at desired points (ideal for breadboard)	Film Capacitors	24 values, from 1 nF to 1 µF (63 V)
Assembly	fully assembled	Diodes	24 pairs of diodes (small signal, zener, Schottky, MOSFET, and germanium)
Number of values	24	Ceramic Capacitors	24 values, from 1 pF to 820 pF (50 V)
Value range	from 1 µF to 470 µF	Transistors	12 different NPN BJTs, 6 N-channel JFETs, 6 N-channel MOSFETs