Doepfer A-151 Quad Sequential Switch Rack & Hanger You can read up on

You can read up on “Full Wave Rectification” to help visualize this concept

yielding closed loops of perpetual modulation

whose messages to and from Christiansen were recently discovered in the Archive—and through interviews

by his inventor Lev Sergeyevich Termen

for many an early wave of synth enthusiasts

Doepfer A-151 Quad Sequential Switch Rack & Hanger You can read up onFully tested, perfect working condition. Minimal rack rash. About Used Items: All modules include a power ribbon cable and M3 screws. Please be aware that although all used items have been tested to work as they are designed, they are sold "As Is" and are not accepted for returns unless there is a defect in the used item. Used items DO NOT qualify for Free Shipping, if you order a new item with a used item you will be charged shipping based on the