DESCRIPTION of the SDS:
The Synchronous Drive System (SDS)
combines a turntable motor speed controller and a line isolator into one
convenient 19" x 3" x 12" (W x H x D) package. The SDS breaks
new ground in clean accurate power delivery using advanced digital technology
and quartz crystal accuracy.
The SDS allows for the adjustment of
both the voltage and frequency fed to the turntable motor. Adjustments are
easily made from the front panel using intuitive, soft-touch controls. The
selected output voltage and frequency are shown using large, easy to read LED
displays. The SDS slowly ramps the voltage and frequency up or down to the
selected value in order to prevent premature motor wear due to abrupt changes.
During motor startup, the SDS increases its output voltage in order to bring
the platter up to speed quickly. Once the desired platter speed has been
reached, the SDS ramps the output voltage down in order to reduce motor
vibration and, therefore, the system's noise floor.
The circuit used in the SDS provides an
incredibly accurate line frequency of great stability. Additionally, the
electronic circuitry effectively isolates the output voltage from the input
voltage, doing away with voltage spikes, low level fluctuations, RFI, and
Instead of merely filtering the power
line, the SDS first changes it into pure DC voltage and then digitally
regenerates its own clean signal. This approach is superior to that used in
many of the other power line conditioners on the market.
The SDS works best with synchronous
motor driven turntables, such as those from VPI. The speed of a synchronous
motor is determined by the frequency it is fed. It is only logical, then, that
a device whose speed is based on the line frequency will always function better
when a stable frequency is delivered. A constant motor speed translates into a
quieter, more faithful musical presentation. Buyers from the continental US only. No additional charge for Paypal. Flat rate insured shipping charge of $20Local pickup available in Central Massachusetts