This information was provided by Jim Williams of Audio Upgrades in Van Nuys, California. Jim has been working for Stevie Wonder for over 25 years, refurbishing the five clavinets that Mr. Wonder owns. Jim is also responsible for the "Hard Hammer" Rhodes sound that "Dyno-My-Piano" copied. This sound was sampled by the "Ballad" patch on the Yamaha DX7 and is still heard today.
This modification that Jim has *generously* provided upgrades the D6 preamp with low noise transistors and premium film caps. According to Jim, this mod opens up the top end details, reduces noise and distortion and adds the "natural air" back in to the sound of the clavinet.
JimWilliams: "I installed a balanced XLR line driver for recording and on stage, it helps interface to pro systems. They also have an "effects" loop installed so the Mutron envelope follower he uses can be routed through before the line driver."