Staredge
Active member
Both sets I've not from my local shop have been white, with red C strings (High and low C). I've never seen any other ukulele strung this way, even when they come with Aquila.
High and low C? I've never heard of a high C before. Do you mean G?
Here's what I found when researching these strings:
Aquila adds red copper powder to increase the density of the string to almost twice as much as standard white Nylgut. This results in a stiffer string capable of lower tunings, less breakage and better intonation. Filing of the nut slot may be required.