Eminent Technology is now manufacturing a new heavy wall version
of the magnesium arm tube For the ET-2 or ET-2.5 Tonearms.
The new arm tube is especially designed for very low compliance ( 20 X 10-6
dynes/cm2 ) cartridges which are characteristic of the latest versions of moving
coil cartridges.
We have observed that the most recent moving coil
cartridges had extremely low compliance and strong forcing functions.
In order to optimize an arm tube for the latest cartridges the new
heavy version has over twice the wall thickness of the current
magnesium arm tube to reduce the resonance levels in the arm tube to
the lowest levels possible.
Shown below is the drawing of the new design prior
to forming the headshell.
The cost for the Heavy version of the Magnesium arm
tube is $200.00. We are also developing a very high pressure bearing
for the ET 2.5 which will operate between 20 and 80 psi. Please
contact Eminent Technology if you have any questions.
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