how do you choose cartridge that your arm will track perfectly ?
@inna Good tonearms are a trick!
You'll want to use a calculator like this one.
A good arm will have absolutely no slop between the cartridge mount and the base of the arm. Its very hard to do this with a jeweled bearing since over-tightening such a bearing could result in damage.
The arm tube should be damped in some manner so it can't resonate while the cartridge is tracking.
Its helpful to have the arm bearings in the same plane as the vinyl so the tracking pressure is constant with warp and bass modulation.
The arm must be very adjustable so settings can be dialed in precisely.

