Guitar builders and players talk a lot about what contributes to a guitar's tone, from neck joints and glue choices to the subspecies of rosewood for the back and sides. These things, and 1,000 more, all contribute in a small or large way. But the single biggest contributing factor is the style of the bracing pattern used for the top.
Leadbelly
Top bracing serves two basic functions: to strengthen the top so that the string tension doesn't tear it apart, and to enable it to vibrate freely to produce the best tone possible. In the 1850's C.F. Martin devised the bracing pattern used as standard in the vast majority of steel string guitars today: the X-brace. X-braced guitars produce a warm, overtone-rich sound that, when balanced well, is often described as piano-like.
Blind Willie McTell
Circa 1940
Another style that predates the X-brace and was utilized much more often, even into the 1950's and '60's, is ladder bracing. Ladder-braced guitars have three or four laterally placed braces spanning the width of the top. This system tends to produce a sound that is immediate and raw, meaning it leans to the fundamental with few overtones to mellow it. In addition, many ladder-braced guitars anchor the strings with a tailpiece which exerts downward pressure on the top (similar to a jazz archtop), further enhancing the tonal effect of its ladder-braced top. These guitars were generally less expensive than their more cultured, X-braced cousins and were very popular with blues and hillbilly musicians of Depression-era means.
If you seek to reproduce the sound of the guitar coming from that old 78 spinning on your Victrola, then a ladder-braced guitar is for you!
Three members of my maternal family,
the Cases, relaxin' in West Virginia
