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"Thanks for the amazing restoration of the June, 1938 home recording on aluminum disc. A wedding gift, across continents, to my parents from my aunt and uncle singing beautifully to piano accompaniment with personal spoken words, is a treasure. I did not think it was possible since only wooden needles had to be used for playback. But you did it ..."


Prevention of vibrations, responses, or resonances that would cause distortion if unchecked. Mechanical control is by friction; electrical control is by resistance. Damping is a measure of a power amplifier’s ability to control the back-emf motion of the loudspeaker cone after the signal disappears. The damping factor of a system is the ratio of the loudspeaker’s nominal impedance to the total impedance driving it. A technique for stabilizing an electronic or mechanical device by eliminating unwanted or excessive oscillations. The reduction of movement of a speaker cone, due either to the electromechanical characteristics of the speaker driver and suspension, the effects of frictional losses inside a speaker enclosure, and/or by electrical means. Any effect, either deliberately engendered or inherent to a system, that tends to reduce the amplitude of oscillations of an oscillatory system.