Mandolin-banjo common in stores. Morgan Monroe has recently made three models, the MM-MB1 Mandolin Banjo the MM-MB2 Mandolin Banjo, and the Banjolin DLX (8 strings). The Morgan Monroe banjos look like traditional mandolin-banjos and have wooden resonators. The Cumbus model has a spun aluminum resonator. Prices currently range from around US $150 to US $700. In Italy, Musikalia manufactures three models of Mandolin Banjo, always with wooden resonator (mahogany, padouk or maple root wood veneered), animal skin, but gives an alternative between simple or double aluminium ring. Most instruction books concentrate on either the mandolin or the banjo. Mandolinists need more
Mandolin of the customary wooden soundboard (mandolin top/face). Historic brands include Dobro and National. As with almost every other contemporary string instrument, another modern variant is the electric mandolin. These mandolins can have four or five individual or double courses of strings. They have been around since the late 1920s or early 1930s depending on the brand. They come in solid body and acoustic electric forms. Instruments have been designed that overcome the mandolin's lack of sustain with its plucked notes. Fender released a model in 1992 with an additional string (a high a, above the e string), a tremolo bridge