There are two kinds of wood that I use to build my harps: The soundboard Tonewoods, and the structural Hardwoods.
The soundboard is made from a coniferous softwood like cedar or spruce, which gives an excellent tonal response. I only use luthier-grade tonewoods. The western red cedar and engelmann spruce are hand-selected from old-growth forests in British Columbia. Port Orford white cedar comes from coastal Oregon. About 80% of the tone you hear produced by my harps is coming from the soundboard.
The neck and pillar are made from deciduous hardwoods and supply the structure to support the nearly 850 pounds of tension that the strings exert on the instrument. The wood of the neck and pillar have no bearing on the tone of the harp. Also, due to the fact that my harps have a round-back soundbox made up of laminations of veneers, the outer veneer matching the wood of the neck & pillar has no effect on the tone of the harp.
Thus the choice of hardwood has no effect on the tone of my harps, and one particular hard wood doesn't necessarily 'sound better' than another. Clicking on the links below will take you to separate pages with more information and pictures:
Western Red Cedar
Port Orford White Cedar
Trim on Soundbox Option