NEW ARRIVAL By 1986, Guild had changed the spec of the F20 - still a 00 size acoustic with a Spruce top, but now with arched Maple back and sides. The change to an arched back changes the dynamic response, meaning there’s greater drive in the mid range, and the Maple gives a sweeter treble response. Tonally is a little brighter than the previous spec, well balanced and really versatile. The guitar’s in very good, all original condition, with no cracks or repairs, just some cool looking lacquer checking, and a comfortable feeling neck.