The ADS design includes two pure analog frequency generators featuring low distortion and noise; a high current Class-A/B amplifier that is transformer-coupled to the turntable output; analog control logic for low noise operation; 33/45 RPM analog speed adjustment controls with center detente positions that are factory calibrated. Created by VPI Director of Electrical Engineering, Michael Bettinger.
VPI ADS is NOT compatible with turntables that have an outboard or wall-wart power supply.
"I was simply blown away when auditioning the ADS versus the SDS. It is noticeably quieter and so much smoother during playback. I personally prefer analog, and there is no digital in this new design. In rigorous testing, our analog oscillators maintain their set-point over weeks without drift, with measurement resolution of +/-0.01Hz / .0003%. In other words, dead-on-accurate. The sine wave produced by the ADS is perfect, the noise level is extremely low, the drive current is very powerful. It has brought my personal Avenger one step closer to my Ampex ATR-102 reel-to-reel machine."
- Harry Weisfeld, founder, VPI Industries