For a component the damping should be applied to the transformer, capacitors and in the case of a CDP the transport mechanism. Damping the chassis is not a bad idea but doesn’t go far enough. Besides, due to the ineffectiveness of damping materials for very low frequencies, I.e., 0-20 Hz, vibration isolation is required. It would be a good idea to isolate all the printed circuit boards from the transformer or even remove the transformer. The bolts holding the transformer should be loosened or removed. It is one of the worst ideas ever to directly couple the transformer to the chassis. Other than for shipping or moving there is no reason for the transformer to be bolted to the chassis. Put springs under it.
Since the entire building and everything in it is moving right along with the seismic type vibration, the chassis is still vibrating (at very low frequencies) even after you did the best you could with damping. Since the resonant frequencies of the CD laser assembly, turntable cartridge, tonearm and platter are very low i.e., 10-12 Hz, only isolation techniques will be effective in reducing their being excited by very low frequency vibration. By isolation techniques I mean mass-on-spring or mag lev. As I oft opine, a thorough and effective plan of isolation and resonance control is required.
Since the entire building and everything in it is moving right along with the seismic type vibration, the chassis is still vibrating (at very low frequencies) even after you did the best you could with damping. Since the resonant frequencies of the CD laser assembly, turntable cartridge, tonearm and platter are very low i.e., 10-12 Hz, only isolation techniques will be effective in reducing their being excited by very low frequency vibration. By isolation techniques I mean mass-on-spring or mag lev. As I oft opine, a thorough and effective plan of isolation and resonance control is required.