Dec 28, · Then I noticed that there's a worn soundpost spot on my violin top much closer to the edges than my existing soundpost could reach. After shaving down my soundpost and fitting it into the old spot, the violin sounds so much richer and brighter. It sounds like a totally different violin almost. To place the post inside the instrument, insert the sharp end of the setter into the post, about 2/3 of the way to the top (picture A) Gently lower the sound post into the instrument (picture B). Once inside the instrument, place the bottom of the soundpost onto the back in the approximate place where it will be.
The post must stand straight and be cut to have full surface contact with both top and bottom plates. The soundpost grains must run perpendicular to the grains of the top plate. At Southwest Strings, all soundposts are professionally carved and correctly placed to maximize sound quality. The diameter of the finished soundpost is about 6 mm. The length depends on the arching, but may be a little above 50 mm in most cases. To measure the required length of the soundpost, insert a pencil (or the soundpost blank) in the right upper f-hole eye at the right angle to the plane of the violin, until its tip touches the back plate.
Below is a diagram of a violin cut laterally throught the center that illustrates the position of the sound post in a completed violin. The sound post is a small dowel of Spruce that is held by friction between the top and back plates of a violin (viola, cello, or string bass), situated under the treble side of the bridge. Because of unique design the tool can be used to grab the sound post and set it in a new location. The cradle of the tool is offset and unique shape of handle stem allows dual reach so the tool can be used for setting the sound post in a smaller size violin as well as in viola.