The Swing Headshell improves tracking ability with no distinction of inner and outer groove tracking performance. By using a well-balanced swing created by two springs you can make superb groove tracking through all of the tracks resulting in an overall improved performance.
The Swing Headshell helps keeps equal pressure on both sides of the groove walls (this is how stereo sound is recorded on a record) so sound reproduction is balanced between the two channels. More details, more natural and more balanced sound.
Little difference between inner and outer groove tracking performance - the well-balanced swing will improve the groove tracking through all the record tracks. To make it easy to understand what the Swing Headshell is, consider that the Swing is like another short tonearm. Due to having a soft joint; this short and light arm can tracked a groove more delicately with well-balanced forces. How can that be possible? The stylus can enter deeper into the groove, with its light and flexible swing, and track both sides of groove with well-balanced force.
More unwanted vibration occurring in a cartridge is dissipated away through the joint and an extremely small amount of the vibration is transferred to the arm. According to Nasotec's comparison test of tonearm resonance, they found the arm equipped with the Swing Headshell is superior to any other common type of arm existing at present for the tonearm resonance. Due to the joint, the resonance is reduced further than a directly connected headshell to tonearm.
An extended life span of the stylus is likely since the soft and flexible swing reduces the one-sided pressure on the stylus.