Tone Arm Resonance: The elastically mounted needle carrier with its specific Compliance and the effective one tonearm mass together form a mass-spring system, which - like all vibratory systems - has a certain resonant frequency having. The aim when putting together the tonearm and cartridge should be to shift this resonant frequency into the inaudible range, i.e. below the lowest frequencies of the music signal (<20 Hz), but above the subsonic vibrations to which the pickup process is exposed.
