The Warchal Amber Violin E string is an innovative new string featuring Warchal's unique patented spiral design. The sound is silky, with great resonance and warmth, even in double stops and chords; blends well with steel, synthetic and gut core strings;whistling is totally eliminated. Amber Violin E String Helix Design; Item: W701
Was skeptical at first of the "anti-whistle" technology and what sacrifices had to be made to achieve it, but I love this string (previously using the Evah Pirazzi Gold E string). Balances well with my Vision Titanium/Solo setup, makes double-stops easy, sings beautifully and has a brilliance and resonance I wasn't experiencing beforehand with the EPG E, although I'm not sure if that's due to the string going false or the string itself.