810 MK2

3-in-1 Subtractive Analog Voice Module

Overview
The System80 810 MK2 is a 30 HP Eurorack module consisting of a high quality subtractive analog synthesizer voice: Voltage Controlled Oscillator (VCO), Voltage Controlled Filter (VCF), and Voltage Controlled Amplifier (VCA). More than just a clone, the design of each sub-module is inspired by the golden age of Japanese analog, featuring elements of the System 700, System 100m, and the Jupiter-8. Add some modulation and an envelope generator to create a complete patchable analog voice with a distinctly vintage character.

VCO
* Discrete Voltage Controlled Oscillator with temperature compensated exponential converter
* 1 V/octave tracking over 7-8 octaves
* Sync input with weak and strong oscillator sync modes
* 1 V/octave CV input + two attenuated exponential CV inputs for pitch/frequency modulation
* Six position octave range switch
* Selectable waveform output: Pulse, Ramp, Triangle, or Sine
* Pulse Width Modulation CV input
* Sub-oscillator

VCF
* Cascaded OTA design inspired by classic Roland topologies with selectable 12 or 24 dB response
* self-oscillating with 1 V/octave tracking (3-4 octaves, normalized to VCO KYBD CV input)
* VCO output and sub-oscillator normalized to two log attenuated inputs
* Two frequency CV inputs, one unipolar and one bipolar
* Voltage controlled resonance

VCA
* Traditional single OTA design
* Three log attenuated audio inputs with IN 1 normalized to VCF output
* Two CV inputs with selectable exponential or linear response

Updates to the MK2 version
* Solid-state octave switching
* Memory recall of waveform selection
* Steel back cover

https://system80.net/product/810-mk2/