Liutaio Mottola Stringed Instrument Design



Woodworkers' Popup Units Conversion Tool / Calculator


Calculator converts to/from decimal inches, fractional inches, millimeters. Popups must be enabled for this site. From the Liutaio Mottola lutherie information website.



Did you know ....


.... you can click on most of the assembly photos on this site to enlarge them for a close look? Also, hovering the cursor over most linear dimension values will convert the values to decimal inches, fractional inches, and SI units.

Fitting and Wearing the
Libellula Electric Upright Bass

The Libellula EUB can be adjusted for players of different height. This is analogous to end pin length adjustment of the acoustic upright bass. The instrument is supported by two guitar straps which strap the instrument to the player's body. This simple attachment mechanism provides very stable positioning of the instrument relative to the player's body. The lengths of the straps affect the orientation of the instrument and can be adjusted to suit the player's preferences.

Last updated: Saturday, November 25, 2017

Basic Height Adjustment

The wing can be attached to any of the mounting holes in the back of the body.

When the instrument is worn the body of the instrument is positioned away from the player's body by a wide wing assembly. The wing assembly is attached to the back of the instrument body with two furniture connector bolts. A series of threaded inserts on the back of the instrument body serve as mounting points for the wing assembly. The first fitting adjustment is to find the most appropriate mounting position for the wing. If the wing is temporarily mounted using the center most mounting holes the instrument can be test fitted by simply holding it to the player's body in playing position. In general, the most comfortable position is with the wing positioned on the player's body just above the belt line. With the instrument held in this position you can do a quick check to see if adjustments to the height of the wing need to be made. If so the wing can be reattached to the instrument body using a different set of mounting holes.

Wearing the Instrument and Adjusting the Straps

Once the basic height adjustment is made the instrument can be strapped on for further fitting. Note that in this discussion the words left and right mean on the player's left and right side, respectively.

The first strap is attached to the strap button on the left side of the wing, goes over the player's left shoulder, and is attached to the lower strap button on the right side of the wing. The instrument is top heavy using just this strap and so will have to be supported by the player while the strap is attached and adjusted. This strap is adjusted for length so that the padded part of the strap is located on top of the player's shoulder and so that the instrument hangs from this strap with the wing positioned just above the belt line of the player's body.

The first strap is attached like this.

After the first strap is attached and adjusted the second strap is attached. This one is first attached to the strap button that is on the back of the instrument body.

The second strap attaches to the strap button on the back of the body...

It goes over the player's left shoulder too, right over the first strap, and then is attached to the upper strap button on the right side of the wing. It is adjusted for length so that the strap pad is positioned on top of the player's shoulder and so that the instrument does not flop around when both the player's hands are removed.

The second strap attaches to the button on the upper right side of the wing.

Again, the positioning of the instrument when supported from the straps is quite stable when the player's hands are not holding the instrument.

Look - no hands.

The angle of the neck (front to back) can be fine tuned by further adjustment to the length of this second strap.