Sumo II moving coil cartridge

Sumo II moving coil cartridge
from the estate of someone who built very high end tonearms in the industry
very rare 2 available price for each

with original box/papers on one

specs found online:
Extremely low Mechanical "Q" as a result of its perfectly balanced cantilever assembly which has an absolute minimum of ringing when subjected to high velocity accelerometer tests.

Specially tapered aluminum alloy cantilever-Many were tried, including Beryllium Oxide, etc.. however the tapered aluminum had the least amount of tortional resonances which was a big problem in previous designs.

Optimum stylus geometry-The stylus is Elliptical with a size of .2 mil x .6 mil. After much experimental work, it has been found that this shape is optimum in order to provide the lowest amount of groove noise and chatter while maintaining tracking ability in the inner grooves.

High Density Ferrite magnet- Found to be an improvement over High Energy Samarium Cobalt magnet in previous designs.

DC RESISTANCE-16 Ohms

Impedance-16 Ohms

Load resistance- 1000 Ohms minimum

Channel separation- 27db (1 kHz)

Gross weight-5.6 grams

Output terminal pin diameter- 1.2 mm

Stylus Force-1.6-2.0 grams

Vertical angle-2.0 deg.