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[Magna Audio]

Mr Coco being a clever sort of chap who needed a big CW for his Alphason / IO lump did some research as to metal densities and came up with Tungsten being good and dense. Bit hard to work Tungsten perhaps so a Tungsten / Copper alloy was found.

According to the Coco metal density bible, densities are:-
75% Tungsten 25% Copper – Density 14.75
Tungsten Alloy – Density 16.9
Tungsten 99.95% - Density 19.3
Molybdenum 99.95% - Density 10.22
Steel is 7.8ish and brass is 8.5ish. So the copper/tungsten is about twice as much.

Here is a first weight made up for my arm (12" wand on PL-71 arm base & SPU Silver Meister cart).

Here is the comparison with the lash up I was using before - moves the mass much further in!


Slightly pink copper look that will dull as it slowly oxidises.

Moving the mass in is apparently a good thing to do - reduces the inertia and looks better not having a lump hanging over the end...