Ainda madeiras, agora segundo a Fender...

http://www2.fender.com/experience/tech-talk/tech-talk-ash-and-alder/

destaque:

ALDER

"Fender adopted alder for electric instrument bodies in mid 1956, not because of a detailed scientific evaluation of its sonic properties, but probably for no other reason than it was there; that it was readily available and more affordable than ash. Ever since, it is the body wood for the majority of Fender electric instruments. It was and still is a very good choice."