Capo - Capo Mechanisms and Styles

Capo Mechanisms and Styles

In a strap-on capo, the rubber-covered bar is placed over the strings and a strap is attached to either end of the bar (wrapped around the back of the neck of the instrument) which holds the bar tightly to the neck. A strap-on capo commonly features either an elastic strap, or a fabric strap which can be adjusted by some method to set tightness. Modern twists on the strap-on include a semi-flexible plastic "strap" connected to the bar on one side which is adjustable on the other side by a ratchet system. Strap-on capos vary from the other types of capos in that most other capos contain only rigid parts, and most other styles do not wrap entirely around the neck of the instrument. This full wrap allows for fairly even pressure of the capo bar across all of the strings of the instrument. The strap-on capo is commonly a low-cost capo option, and is one of the earlier styles of capo. Because the strap material is stretched to create a tight fit, the straps on these capos can be prone to stretching and wear.

One of the more common modern capo styles is the spring-clamp "trigger-style" capo. The most common form of this type of capo has two bars: a rubber-covered bar to barre the strings, and another that presses against the back of the neck of the instrument to hold the first bar to the strings (this second bar is commonly curved or shaped to match the contour of the back of the neck). The two bars are attached on a pivot at one end; a spring presses the bars together. Each bar has a 'grip' attached at a right angle to the bar; the two grips, when squeezed together by the user, pull the two bars apart, allowing the user to quickly release the capo's grip, apply or adjust the capo, then release the grips, allowing the spring to pull the bars together again. The look of the grips, and the action of squeezing them is akin to a gun's trigger, leading to the name of this capo. These are the most common design referred to as "quick-release" capos. Though other styles also use that term, the trigger-style capo, because it can be operated by one hand in one single squeezing motion, is typically the quickest capo to apply or move on the instrument; other capos can be quicker and easier to remove from the instrument. One disadvantage to the trigger-style capo is that the pressure of the spring is not adjustable. The spring will apply its maximum pressure to hold the strings down, which could have an effect on the tuning of some guitars if not applied properly. These capos can typically be applied either to the treble or bass side of the instrument, depending on the player's preference. Two of the most recognizable models of trigger-style capos are manufactured by Dunlop and Kyser.

Certain manufacturers have created their own unique attempts to create the ideal capo. One of the more popular and well recognized capos is the Shubb capo. The Shubb capo is applied by holding the capo in its desired location, and closing a lever to secure the capo. The unique aspect of this capo is that the lever presses against a second arm that presses against the back of the neck of the instrument. The amount of pressure the lever exerts is adjustable by a screw so that the capo can exert the minimal amount of pressure required to hold down the strings. This is claimed to have the least impact possible on the tuning of the instrument. The Shubb capo has the disadvantage of requiring two hands to properly apply or move, and its adjustment is more complicated than some other capos; however, because of the lever design, the capo can be removed very quickly by simply releasing the lever. This is particularly true if the capo is applied from the treble side of the instrument, which will allow the capo to drop off of the instrument in an instant.