Nice mellow sounding. Not as bright as the Darco or Marquis series by Martin. These silk and steel have A LOT of sustain...especially when picked or plucked on single notes. Using them on my Ibanez AW artwood exotic zebrawood guitar.  I like them for what they are...mellow volume...but clearly these are made for smaller parlor or concert body guitars. Best to stick with other phosphor bronze for bigger dreadnaught and jumbo bodies, if you want full tone from your guitar.