VPI SDS Turntable Power Supply / Speed Control; Synchronous Drive System

VPI SDS Turntable Power Supply / Speed Control features dual digital LED displays, an output voltage of 72–115 VAC, output frequencies of 52.0–66.0 Hz (33 RPM) and 71.0–90.0 Hz (45 RPM), 175 mA RMS output current, and dimensions of 16" W x 3" H x 12" D at 10 lbs. The Synchronous Drive System combines digital synthesis with quartz-crystal accuracy to deliver pure AC power to synchronous turntable motors. By converting wall power to DC and regenerating a pristine AC signal, it isolates your turntable from voltage fluctuations, line noise, and RFI. Its smart circuit ramps voltage up during startup for fast speed lock, then lowers output voltage during playback to reduce motor vibration and lower the noise floor, while soft-touch front controls allow precise speed adjustment and pitch correction.

Reviewers acclaim the SDS as a transformative upgrade, praising its ability to eliminate speed drift and lower the system noise floor. Audiophiles report immediate gains in pitch stability, bass definition, soundstage depth, and instrument separation. Owners also appreciate the seamless front-panel 33/45 RPM switching, the gentle voltage ramping that prevents motor wear, and the fine frequency tuning that lets collectors pitch-correct legacy pressings.

Adding this motor controller to your system bridges the gap between everyday playback and master-tape precision, allowing your vinyl collection to express its full dynamic capability. Isolating the motor from grid instability ensures every LP plays with rock-solid timing and refined tonal accuracy. For any listener seeking to maximize turntable performance and achieve effortless pitch stability, this speed supply is an essential investment for an elevated analog setup.

Brand	VPI
Type	Vinyl Care & Misc
MSRP	$1,249.00
Cosmetic Rating	8 - Very good condition with minimal visible cosmetic wear including some light marks on the top and sides of the chassis. Despite these minor blemishes, this unit still looks good and has been well cared for.
Functional Notes	Operational condition of this item is excellent, fully tested and no issues found.
Age	Unknown
Owners	Unknown
Service History	None