Pirastro Obligato Viola - The All-round Synthetic Core String modern synthetic core strings warm and brilliant sound big and powerful tone excellent response Features Obligato strings have a core made from a modern synthetic multifilament fibre. Obligato strings sound warm and full, yet have a brilliant and focused tone. big and powerful tone excellent playability and response throughout the entire dynamic range excellent tuning stability absolutely insensitive to variations in temperature and humidity Set A-steel wound with aluminum D- and G-silver C-tungsten-silver Gauges soft, medium and strong All straight strings are only available in medium gauge. Tailpiece Options All strings have a ball-end. The A- string has a removable ball. Sizes All Obligato strings are available in 4/4. Special Features The core material of the string lines Evah Pirazzi Gold, Evah Pirazzi and Obligato consists of a new synthetic material that we have co-developed with our supplier and which we obtain exclusively. We are convinced that this new core material is superior to other synthetic materials and steel, because: it offers an unmatched wide range of sounds, absolutely insensitive to variations in temperature and humidity, and it offers musicians an unknown dynamic range. In combination with our newest production techniques we are now able to offer a new family of strings, which offer: a complex tone, rich with overtones; bring out finest nuances in pp and great depth in ff; great playability; outstanding response and outstanding tuning stability