Up to the middle of the 20th century the only available strings for guitar were plain gut for the trebles (with the timbric presence, response and brightness typical of thinner gut strings) and wound on silk core basses (with an exquisite vocal quality, not as bright and with less sustain than modern wound nylon strings). The Ambra 900 set was developed to recreate this sound, using modern synthetic materials. Features rectified Supernylgut trebles with silver copper wound Nylgut basses.
