Hi Frank,
Shelters aren't known for their tracking ability either. The 901 has inner groove problems even on the best arms, including the top linear trackers. AFAIK the 90X has the same stylus and compliance so it's probably no better in this respect.
If you liked the Lyra's tracking but want a fuller midrange try a ZYX or Dynavector. Either one will out-track a Shelter or Grado. The micro-ridge stylus makes all the difference. The Grado stylus in particular is a war club by comparison. ZYX's are perfectly neutral in the midrange, from top to bottom in fact. I've read that Dyna's have slightly fuller mids but I haven't heard one to compare.
Shelters aren't known for their tracking ability either. The 901 has inner groove problems even on the best arms, including the top linear trackers. AFAIK the 90X has the same stylus and compliance so it's probably no better in this respect.
If you liked the Lyra's tracking but want a fuller midrange try a ZYX or Dynavector. Either one will out-track a Shelter or Grado. The micro-ridge stylus makes all the difference. The Grado stylus in particular is a war club by comparison. ZYX's are perfectly neutral in the midrange, from top to bottom in fact. I've read that Dyna's have slightly fuller mids but I haven't heard one to compare.

