Ortofon OM 1S

The OM 1S is a magnetic cartridge (MM) with a Spherical shaped stylus that provides balanced and distortion-free playback for general-purpose applications.
 
If your tonearm has a standard headshell or a cartridge mount, then step up to optimal sound reproduction with OM’s. A glance at anyone of these cartridges will reveal Ortofon's answer to perfect tonearm matching. Ingeniously tucked into the top of the mounting bracket is a tiny, removable weight plate.

If your tonearm is a standard tonearm, just leave the weight plate.

If your tonearm is one of the low-mass types, then simply remove the weight. The mass of your OM cartridge is now a mere 2.5g
 
 
Specifications
 

Output voltage at 1000 Hz, 5cm/sec.  -  4.5 mV
Channel balance at 1 kHz  -  2 dB
Channel separation at 1 kHz  -  20 dB
Channel separation at 15 kHz  -  12 dB
Frequency response  -  20-22.000 Hz 
Tracking ability at 315Hz at recommended tracking force *)  -  60 µm
Compliance, dynamic, lateral  -  20 µm/mN
Stylus type  -  Spherical
Stylus tip radius  -  R 18 µm

*) Typical value