This
18" QUATTROPORT
was the first exploration
into how much of the side of a guitar cold be removed without sacrifice of
normal acoustic sound output
QUATTROPORT
stands
for sound hole
configuration. In this case
it is 3+1.
As
you might assume, there is considerable side sound projection.
But there is also a normal front sound projection as well.
The front sound hole is diagonal for favorable bass to treble
construction of the soundboard.