Koetsu cartridges. They must be something special.

Jonathan Carr, the designer of Lyra cartridges, has praised Mr. Sugano of Koetsu for discovering the use of platinum alloy magnets.  This is particularly interesting because they both like platinum magnets even though they make quite different sounding cartridges.

This just in: platinum is not magnetic. The platinum in cartridge magnets is probably an alloy of Pt and Co, somewhat akin to Alnico (aluminum/nickel/cobalt) where both Co and Ni are magnetic.

I was aware of Koetsu in 1978 through The Audio Critic, who tested one. It was the world's first cartridge to sell for - gasp! - $1000. Peter Aczel said it was the best he'd ever heard. Don't give me that bullsh*t about inflation making that $1K Koetsu worth $4K in today's dollars. There is so little material in any phono cartridge to justify the outrageous prices asked today!

@lewm : Guitar pickups and strings determine the sound of an electric guitar. The body material/shape have no affect. The magnet material and number of coil windings is where the "magic" resides.