Perpetual cello strings are the most powerful of Pirastro's cello string line & we've been hearing rave reviews from our customers! Perpetual strings are a great option for cellists seeking a clear warm sound with robust projection. Want additional power and dynamic possibilities? Then check out Perpetual Soloist G and C strings--when combined with the medium A and D, the sound gains radiance, brilliance, volume and presence. Bonus: Perpetual cello strings have a fast play-in time!