Warchal created the Amber viola set with the goal of achieving the tonal qualities of gut strings, without the typical tuning instability. Their solution was a completely new core material called W-Core®.
Choose between Metal core A with the Warchal helix design, or the Synthetic core A.
-Small size will suit most instruments-
Small size: Vibrating Length 14"– 15" (36 - 38 cm)
Large size: Vibrating Length 15"– 15 ¾" (38 – 40 cm)
This is the second set of Ambers I've tried and the first time with metal A. The last set lasted for about 4 months for me with almost daily playing. I like the sound, big, warm, and a little breathy. Takes about a week of playing to break in. My only complaint is they ring too long. Both the metal A and synthetic A were well matched. The metal A is little more piercing and responsive. Take a little more pressure for string crossings compared to all metal Daddario Kaplans I was using before (those are very easy to play).
Put the Amber viola set on my Tom DeLuca 16" hand crafted in 2008 viola. Strings are still stretching a bit but are very similar in tone to Dominant strings.
Very soft on the fingers. The C string is a little larger in diameter then a Dominant C. Overall, they seem a little louder then the Dominants and a little louder
then the set of Warchal Karneols that I have on my other DeLuca viola. Overall, I am quite pleased. Since they have very little playing time so far, I can not
comment on overall durability.