As a direct-drive motor rotates, there are action-reaction forces set up between the platter and the base (cabinet), and between the motor rotor and the stator. These lead to tone-arm vibrations which cause poor sound reproduction. It is described how these forces can be minimized by adding a second motor or torque generator. The main drive motor and the second motor or torque generator are driven in reverse phase, which greatly reduces base (cabinet) vibration in the rotational plane. This technique provides a substantial improvement in tonal quality.

Authors: Fujimoto, Yasuhiro; Suzuki, Masao; Fujio, Kazuyuki; Sasamoto, Katsumi; Satoh, Yuji
Affiliation: Sansui Electric Company, Ltd., Tokyo, Japan
JAES Volume 31 Issue 4 pp. 246-252; April 1983
Publication Date: April 1, 1983

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.