Augustine Blue Label Classical Guitar Strings, Light Top/Heavy Bottom Augustine Blue Label classical guitar concert strings feature heavy bass strings and low tension treble strings. They generally produce a strong and loud bass response, with a softer treble response and volume. Blue basses have Augustine's heaviest copper windings, for higher string density. The treble strings are Albert Augustine's Classic, low tension nylon strings, his original design he created for Andres Segovia in 1947. Blue Label strings work well on classical guitars that need more bass volume to balance the string volumes, or when a strong bass voice is desired by the guitarist. Augustine classical guitar strings are ranked according to bass string density and treble string tension class. Blue Label = Heavy Bass Strings + Low Tension Treble Strings. Quantity Pricing: We are making it more economical when you purchase Augustine Blue Label string sets in larger quantities. You save money by buying in larger quantities, instead of multiple single sets. Just use the pull down tab above to access Quantity Pricing. In Stock. Go to Augustine Concert Strings page, for more Augustine classical guitar strings.