We found the optimum pivot point before the others even knew it was missing.
Most manufacturers are content to determine tonearm pivot points by trial-and-error. And many tonearms are so susceptible to external vibrations that you have to tiptoe around the turntable, With Sansui's Dyna-Optimum Balanced (DOB) tonearms, based on our Optimum Pivot Point principle, the transmission of vibrations is dramatically reduced to give you more freedom to enjoy your music. It's used in our new, fully automatic direct-drive FR-D4 and FR-Q5.
Here's how the DOB works: Put a pencil on a table. Wiggle one end back-and-forth. The other end will move; but a certain point will not. This is the Optimum Pivot Point.
In our new DOB tonearm the arm is pivoted at this highly stable point. With no relative motion be tween the point and the arm support, effects from external forces are minimized. Friction is almost non-existent, so the stylus is free to trace every part of the groove. We also added a special decoupling device and a unique counter weight for optimum tracking.
A patent is pending on Sansui's brushless DC motor used in the FR-D4 and FR-Q5. And with the Quartz-PLL system of the FR-Q5 and the special speed error detection/correction system of the FR-D4, wow and flutter, speed accuracy and signal-to-noise specifications are outstanding. All operations are computer-controlled using the latest LSIC technology. The computer even knows to shut off the motor if you forget to unlock the tonearm clip.
To make the FR-D4, FR-Q5, as well as the budget-priced direct-drive FR-D3 even more convenient, we put all the controls up-front, outside the dustcover.
Ask an authorized Sansui dealer to demonstrate our new turntables. Listen closely and you'll hear what the others are missing.
SANSUI ELECTRONICS CORP.
Lyndhurst. New Jersey 07071 Gardena, Ca. 90247
Sansui Electric Co., Ltd., Tokyo, Japan
Sansui Audio Europe S.A., Antwerp, Belgium
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(Adapted from: Audio magazine, Apr. 1980)
Also see:
Sansui components (ad, Nov. 1977)
Denon direct-drive turntables (ad, Apr. 1981)
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