Top-Tensions
Gibson’s now-legendary Mastertone banjo line was introduced in 1925 and quickly became an industry standard, but by the late 1930s the banjo had fallen in popularity. Anxious to kick-start flagging sales, Gibson announced a new product that fixed an old problem. The new “top-tension” Mastertone design, introduced in 1937, was intended to make life easier for banjoists contending with the fickle calfskin heads. Calfskin heads were the standard before World War II (Remo Belli would later develop mylar heads) and calfskin needed frequent attention. Changes in the climate, especially in levels of humidity, dramatically changed the tension on a calfskin head and changed the banjo sound. Retensioning the calfskin head was common, and by moving the tension hook adjustment to the front (or top) without removing the resonator, Gibson made the tensioning process much easier.
While they were at it, Gibson introduced other changes such as carved solid-wood resonators, radiused fingerboards, and bold Art Deco cosmetics. Most important to modern players, flathead tone rings were also standard on the top-tension models. The three new top-tension Mastertone styles 7, 12, and 18 were, according to company literature, the “alarm clock” that was going to “wake up new possibilities in banjo playing”. The banjo’s time as America’s favorite fretted instrument had passed, however, and the top-tension line faded away when Gibson suspended banjo production during World War II.
The top-tension banjo had no real champions among the first generation of bluegrass banjo players (although Don Reno did occasionally use a style 18), but as the decades passed, Gibson’s prediction of top-tension-fueled banjo innovation seemed accurate, though delayed. A young Bill Keith used a converted TB-12 for his groundbreaking performances and recordings in the new melodic style when he joined Bill Monroe’s Blue Grass Boys in the 1960s. A Style 18 has been in Bela Fleck’s arsenal since the 1980s, and a Style 7 is the favored banjo of Noam Pikelny of Punch Brothers fame. Although Gibson top-tensions are once again out of production following a revival in the 1990s and early 2000s, the banner has been taken up by other companies including Ome, one of whose top-tension models has found favor with virtuoso Matt Menefee of Cadillac Sky.