This review is regarding the 'Soloist' version of the several types of Perpetual C strings available. Previously, I had been using the 'Edition' version for about 2 years and found them to be
fantastic. However, the 'Edition' set has a problematic A string, at least for my cello. This set solves every problem I can think of, from powerful and warm projection to excellent response on all four strings. The A I am using, though, is the 'Stark', and it is quite the finest A string I have ever used. In short, these strings are the very best yet!