Common styli versions are Prestige Line & Reference line
XTZ /TLZ /MCZ /8MZ etc Nude Hyper Elliptical / Twin Tip Bi-Ellpitcal Stylus with 2/3/4 part construction OTL cantilevers These styli can transform the lower spec models
OTL "Optimized Transmission Line" cantilever shaft is brought to a fixed axial pivot that supports the entire cantilever assembly.
A miniature element attached to the end of the cantilever is allowed to move freely within the lines of flux of a stationary magnet and coil structure.
Grado's OTL provides an ideal transfer of the signal from point to point, e.g., stylus to
cantilever to magnet to coils, etc. This has been achieved by eliminating resonance at each of these key junctions. The transmission line cantilever consists of separate sections that are
telescoped into each other.
All sections are made of different alloys, some sections hollow,
other sections solid. These sections are bonded together with materials that act as dampers,
and are coated with a black proprietary material which controls and absorbs resonances that
travel on the surface of the cantilever (known as skin effects). The OTL stylus/cantilever
design will make your records sound quieter, improve the height, width, and depth of the
soundstage, and offer more detail than previously obtainable. Cartridge Holography does
exist...and that is what Grado's OTL technology is all about, more performance.
Some have tried over the years to make replacement grado Styli but always failed
Higher spec models are all Fixed stylus like a MC & trade on / rebuild by the Factory