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X-braced design
In 2009 Model 12 (photo top right) was my X-braced proto-type
using a cedar top which employed an elliptical soundhole to allow for
the closed up X. This design was very successful and it occurred to me
that it would work very well in the small- bodied model 08 (photo
bottom right) with simplified strutting, where the long vibrating
length of this design can be put to good effect in extending the bass
response. A low air resonance similar to a larger fan-braced guitar can
be easily achieved with this system - a small guitar with profound bass
and great projection is the result. You also get considerable weight of
note and sustain with this pattern, as well as an even response and excellent
balance. It works extremely well with cedar as well as spruce, which is
an added bonus. I recently made one using Port orford cedar (a North American
species of cypress), also with excellent results. I first used this pattern
in the small body shape for a spruce/indian rosewood 640 mm scale guitar
which is used by students at the Yehudi Menuhin School.
Although
an X - brace design is generally associated more with 20th/21st century
steel-string guitar production, it was already being used by the Roudhloff
brothers in London for their classical guitars back in the 1830s and 40s
! (bibl. "The century that shaped the guitar" by James
Westbrook), and it is possible that later, Martin saw one of Roudhloff's
X-braced guitars and subsequently adopted the idea (thanks to James Westbrook
who is investigating this area) and used a similar design in his 0-28
models that Julian Bream played in his youth. The Roudhloff's were russian
emigrés who trained in France and then set up shop in London where
they experimented with various designs, including the X-braced one. Jim
Westbrook has discovered more information on the Roudhloffs' first X-braced,
so-called "Melophonic guitar" whilst studying for his phd, which
he has recently finished - once he has published it I will be able to
add some more historical detail.
For whatever reason, it was the spanish fan-braced pattern (as exemplified
by Antonio de Torres), which was widely adopted for the classical guitar,
while the X-brace was forgotten. Clearly there is nothing new about using
an X-brace for classical or other nylon strung guitar types and there
are good reasons for using it, as alluded to above- the long bars and
greater working area of the top allow the maker to achieve a low body
resonance with resultant good bass and better overall balance, without
resorting to wafer thin tops and super light strutting of a Hauser style
fan-braced guitar, for example. (Hauser also used little or no doming
in the top in order to keep the top pitch low, which means the top distorts
greatly under tension).
Of
course, in recent times the modern nylon strung guitar has undergone dramatic
changes, both in the kind of sound produced and in the building methods
and materials used, in an effort to produce ever louder guitars with greater
projection. However, such guitars are not to everyone's taste and personally
I prefer a more traditional approach and sound. An X-braced guitar is
just as traditional as a spanish fan-braced one - it's just a different
tradition, and it is certainly a valid alternative for the classical guitar,
and one worth exploring. Having simplified the X-braced pattern for the
small-bodied shape, I went on to use a similar system in the larger bodies
( 12 and 13) where it works very happily.
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