Warchal Amber Cello C String, synthetic core/ tungsten & pure silver winding. Amber strings were designed to provide the energetic projection of metal core strings along with the depth and warmth of gut core strings
I wanted to try this string because any other C string I have tried on my cello has lacked satisfaction. This string opened up the bass substantially AND it sound amazing. Warm and no metallic harshness. I liked it so much that I ordered the G string a day later and now my cello sounds like it has a sound supercharger installed. The only thing is that it is a bit sluggish, but once you get used to it, it is very rewarding.