1200y3 wrote:I have a few modifications I have been doing simply to improve personal listening enjoyment, so every thing is done by ear. As a means to choose the simplest or best design I intend to measure them when I feel I have them finished. But my conclusion to the mechanical resonance idea of Thomas's is that the thorn is decoupling the tip and reducing them, so it must be less. Tip decoupling (load decoupling) is decoupling the mass. My problems are the reduction of bass. If the joint (splint is larger, then resonances will occur. Simply by cutting a fine crack in the cantilever of a Phanstehil (cheap and solid) makes a stylus as listenable as my V15 (I use a fresh disposable shaver blade) by reducing all resonances and most sibalance. I will try a crack on the left and right side of the cantilever and measure them against the original with sine waves.
If the tip isn't overly large, the cantilever and compliance is the most significant part of the stylus. The stylus tip will grab the tightest detail, but it will be colored by everything else in it's way. The bigger the stylus size, the bigger and fuller the sound, as long as we have good damping and resonance control. So we have a "analytical" sound with a line contact which will only make sense in the sweet spot, or we have a music lover's sound with another shape where a stereo effect can be enjoyed everywhere in the room. But those tip resonances have to killed and damped. It can only be done at home. People confuse these resonances with mistracking, and they do cause the stylus to mistrack.
My initial thought is that a thorn will cause a discontinuity of the cantilever. As the cantilever itself, the joined part will have its own resonant behaviour, besides the main/cantilever-suspension/arm (i.e. decoupled above 8-12 Hz). A second decoupling of cantilever and magnet part is something not desired at least up to 10 kHz, I can not understand why it should be an advantage? The best solution is to have breakup modes above the audible fr range, or having controlled/damped ones to keep high-frequency response linear.
I do not know how the original Sumo measures (although it states +/-1 dB up to 20 kHz), so the brighter response may either be due to the original design or due to breakup resonances at 6/12 kHz.