The Sonicap is well balanced and true to the source. The word "neutral" is so loosely (and incorrectly) used, that I prefer the term "balanced". If you are looking to "add" warmth and richness, this is not the capacitor. However, the Sonicap is warmer than brighter/harsher capacitors such as Axon, Bennic, Dayton, Erse, Jantzen Crosscap, Solen, etc...