A string instrument is disclosed having a body with an air cavity defined by a top plate, a bottom plate, and one or more ribs, a bass bar being secured to an inside surface of the top plate, the bass bar comprising a layup of a plurality of laminates constructed from western red cedar and comprising particular dimensions and placement on the top plate relative to the length of the instrument body.

A string instrument is disclosed having a body with an air cavity defined by a top plate, a bottom plate, and one or more ribs, a bass bar being secured to an inside surface of the top plate, the bass bar comprising a layup of a plurality of laminates constructed from western red cedar and comprising particular dimensions and placement on the top plate relative to the length of the instrument body.

A sound post, particularly for string instrument, having a variable length is described. The sound post consists of a first tubular component having a first end and a second end and a second tubular component having a first end and a second end, wherein the second tubular component is at least partially arranged in the first tubular component in a movable manner, and wherein a first pivotable end piece is arranged at the first end of the first tubular component. The sound post also comprises a counter-element and a tension fastener element which is rotatably arranged and suitable to be countered against the counter-element by rotation. A pivotable end piece is also arranged at the second end of the second tubular component. A sound post tool set for mounting the sound post in an instrument and a method for mounting the sound post in an instrument are also disclosed.

A sound post, particularly for string instrument, having a variable length is described. The sound post consists of a first tubular component having a first end and a second end and a second tubular component having a first end and a second end, wherein the second tubular component is at least partially arranged in the first tubular component in a movable manner, and wherein a first pivotable end piece is arranged at the first end of the first tubular component. The sound post also comprises a counter-element and a tension fastener element which is rotatably arranged and suitable to be countered against the counter-element by rotation. A pivotable end piece is also arranged at the second end of the second tubular component. A sound post tool set for mounting the sound post in an instrument and a method for mounting the sound post in an instrument are also disclosed.

The present invention relates to a tone-controlled functional acoustic guitar that prevents a body from being deformed to avoid the changes in sound, increases sound transmission, finely adjusts tone fields in accordance with a player or user's selection, and has a specific structure on a head thereof to suppress bending on a neck caused by the tension of strings. According to the present invention, the tone-controlled functional acoustic guitar includes: a body having a top plate, a bottom plate and a side plate connecting the top plate and the bottom plate with each other; a neck fixed to one side of the body; a head disposed at the end portion of the neck; and a tone control member detachably mounted at the inside of the body in such a manner as to be controlled in length to support a space between the top plate and the bottom plate of the body, wherein the tone control member includes: a contacting and moving member; and height control means expandably and contractably moving the contacting and moving member.

The present invention relates to a tone-controlled functional acoustic guitar that prevents a body from being deformed to avoid the changes in sound, increases sound transmission, finely adjusts tone fields in accordance with a player or user's selection, and has a specific structure on a head thereof to suppress bending on a neck caused by the tension of strings. According to the present invention, the tone-controlled functional acoustic guitar includes: a body having a top plate, a bottom plate and a side plate connecting the top plate and the bottom plate with each other; a neck fixed to one side of the body; a head disposed at the end portion of the neck; and a tone control member detachably mounted at the inside of the body in such a manner as to be controlled in length to support a space between the top plate and the bottom plate of the body, wherein the tone control member includes: a contacting and moving member; and height control means expandably and contractably moving the contacting and moving member.

A resonance system for enhancing the acoustic properties of a musical instrument. The musical instrument includes a hollow body including a soundboard, a back, and a side wall positioned between the soundboard and the back of the hollow body, at least one first sound hole positioned in the upper bout and/or waist of the soundboard, and at least one second sound hole positioned in the lower bout of the soundboard.

A resonance system for enhancing the acoustic properties of a musical instrument. The musical instrument includes a hollow body including a soundboard, a back, and a side wall positioned between the soundboard and the back of the hollow body, at least one first sound hole positioned in the upper bout and/or waist of the soundboard, and at least one second sound hole positioned in the lower bout of the soundboard.

A stringed instrument comprises a substantially hollow body that includes a front soundboard, a rear diaphragm, and a side wall, all defining an internal volume therein that has a first curved interface between the side wall and the front soundboard and a second curved interface between the side wall and the rear diaphragm, such that when the front soundboard vibrates in reaction to the strings being strummed, struck, or picked the rear diaphragm is driven by the side walls and the first and second curved interface. The stringed instrument may take the form of a guitar that includes a primary sound aperture in the front soundboard, a neck having a fretboard with a plurality of frets, a heel fixed at a proximal end thereof, and a string nut at a distal end thereof. A tuning head projects away from the string nut and includes a plurality of tuning mechanisms.

A stringed instrument comprises a substantially hollow body that includes a front soundboard, a rear diaphragm, and a side wall, all defining an internal volume therein that has a first curved interface between the side wall and the front soundboard and a second curved interface between the side wall and the rear diaphragm, such that when the front soundboard vibrates in reaction to the strings being strummed, struck, or picked the rear diaphragm is driven by the side walls and the first and second curved interface. The stringed instrument may take the form of a guitar that includes a primary sound aperture in the front soundboard, a neck having a fretboard with a plurality of frets, a heel fixed at a proximal end thereof, and a string nut at a distal end thereof. A tuning head projects away from the string nut and includes a plurality of tuning mechanisms.