Larsen Magnacore C & G Strings The Magnacore simply describe their core (as a 'steel wire'). Not tungsten or platinum, but steel. Oddly enough, the regular Larsen C and G strings, are "Tungstens" so while they are made with same alloy as the Spirocores, most players still thought as much power as the Spirocores. Magnacores have power. A special steel (formulated alloy) that gives the string even more power, but with that very famous Larsen "warmth"....yes, now on the C and G strings that's never really been possible before. Some of the cello players that have tried and used these so far say that they have the same, (if not more) power as the Spirocores, but have a more dimensional, and wider tonal complexity too boot. That's fun and very rewarding news because anytime you can still have the same punch and power, but add to the tonal spectrum, is a great achievement. So, for years, the most discerning cellists would take the power of the Spirocore Tungsten CG strings, instead of the Larsen C and Gs. They thought that while the Larsens were nice and warm, lacked the power and punch they wanted when attacking them with their bow. Now, the new Magnacores not only give even more power, but they still have the beautiful Larsen tone with it. As always, you can buy these at the lowest prices here. Don't forget that because our prices are privately so low, you will need to type in your password to see our protected page. Email us from the Larsen page if you need your new password sent to you in a hurry.