Stoel Music Systems

A Eurorack module that plugs into a 16-pin power connection and generates regulated +5V from the +12V rail for bus boards lacking a +5V supply, with thermal shutdown and current limiting.

A Eurorack module that distributes control voltage or audio signals to up to eight destinations, using a separate unity gain buffer amplifier for each output to prevent voltage drop.

A Eurorack power distribution board with connectors for up to 20 modules, dual screw terminals for daisy-chaining, LED voltage indicators, and an onboard switchable +5V regulator.

A Eurorack module providing two adjustable control voltages, each with coarse and fine tuning controls spanning over five octaves and a semitone respectively.

A Eurorack module featuring two voltage-controlled amplifiers with switchable linear or logarithmic response for shaping audio or control voltage signals.

A passive Eurorack module providing two four-jack multiples for splitting signals to multiple destinations, with a jumper to combine them into one eight-jack multiple.

A compact 4HP Eurorack module providing four logarithmic (audio) VCAs that mix to a common output, with audio and CV jacks normalled from top to bottom.

A classic 24dB/octave analog lowpass filter Eurorack module with voltage control over frequency and resonance, based on a filter chip used in several vintage synthesizers.

A vintage-inspired voltage-controlled Eurorack filter using matched transistor pairs in two sequential filter blocks, offering a 12dB/octave slope with lowpass and bandpass modes and self-oscillating resonance.

A Eurorack filter module built around the original IG00156 VCF chip used in classic CS-series synthesizers, providing lowpass, bandpass, and highpass outputs with CV control over frequency and resonance.

A 24dB/octave voltage-controlled lowpass filter based on the later ARP 2600 filter, built around Norton amplifiers with added voltage-controlled resonance.

A Eurorack mixer with four inputs and one output, each input using a linear tapered level control best suited to mixing control voltages.

A Eurorack mixer with four inputs and one output, each input using a logarithmic (audio-tapered) level control best suited to mixing audio signals.

A Eurorack envelope generator module providing classic attack, decay, sustain, and release control with normal and inverted outputs, plus a manual trigger button.

A Eurorack module featuring two multi-waveform voltage-controlled LFOs with cross-modulation, each offering saw, square, triangle, sine, and combination waveforms up to about 120Hz.

A power distribution board for Eurorack cases that supplies power connectors for up to ten modules along with screw terminals for connecting an external power supply and LED voltage indicators.

A conversion kit for the Mini Speaker that includes a black front panel and a large gray knob.

A Eurorack module providing two classic analog ring modulators with a switchable multiplication mode that lets the X inputs either modulate or multiply each other.

A Eurorack ring modulator that uses the original vacuum tube and transformer circuit arrangement to produce harmonically rich, bell-like, and metallic sounds.

A versatile Eurorack voltage-controlled oscillator with coarse and fine tuning, pulse width modulation, linear FM, hard and soft sync, and saw, pulse, triangle, and sine outputs along with a sub oscillator.

A Eurorack module providing a balanced XLR line-level input, using a Burr-Brown balanced line receiver to interface professional balanced sources with Eurorack systems, with an 1/8-inch level-controlled output and LED metering.

A replacement power ribbon cable for connecting Eurorack modules to a power bus board.

A Eurorack module that converts a high-level modular synthesizer signal into a balanced line output, using a broadcast-quality balanced line driver, an LED meter, and a gold-plated XLR connector.

A Eurorack module providing two stages of vacuum tube distortion and waveshaping with switchable single or dual gain stages, harmonic content control, and CV control over saturation.

A high-fidelity Eurorack headphone amplifier with a discrete transistor output section that accepts mono or stereo signals and outputs to both 1/4-inch and 1/8-inch headphone jacks.

A Eurorack module providing two bi-directional electronically controlled switches that route a common jack to one of two other jacks based on an applied CV signal, supporting both audio and CV signals.

A Eurorack module that divides an incoming clock signal into progressively slower rates from /2 to /64, each with an LED indicator, plus a reset jack to restart the count.

A Eurorack module with a built-in 4-watt amplifier and 3-inch speaker for monitoring an Eurorack system without external speakers or headphones.

A flexible Eurorack spring reverb module with level, wet/dry mix, tone emphasis, and feedback controls, plus a 100% wet output and external feedback input for creative sound design.

A simple Eurorack summing mixer for combining signals at unity gain, useful as a pre-filter or output mixer for multiple voices or percussion sounds.

A digital Eurorack oscillator based on an open-source design offering waveforms, wavetable textures, chords, percussion, and noise sounds.