Random*Source Serge Extended Variable Slope filter (VCFS) eurorack module, precision op-amps 2019

This Serge VCFS module was made by professional builder Jack Schoonover in 2019. It includes its original power cable, plus a non-original antistatic bag and a box. Some rack rash 

This VCFS features WIMA caps and other quality components. Also originally it was made with THAT2180Bs in ICG1 and ICG2; OPA2134PA in IC1 and IC2; and TL072 in IC3, IC4, and IC5. Under the builder’s direction, the original owner swapped OPA2277P into IC3, IC4, and IC5, replacing the TL072 and affecting a noticeable improvement to the this module’s audio quality.