of archtop bass guitars. Other variations 4-string (tenor), 7-string, 9-string, and 12-string archtops have been manufactured. A few luthiers offer archtopped Maccaferri guitars. The Mohan veena is a cross between an archtop and an Indian veena. Some electric archtops also have piezoelectric pickups, making them hybrid guitars. A relatively small number of ukulele makers offer instruments with flat tops but arched backs, generally of heat-pressed laminate construction with high-quality veneer; that design concentrates the uke body's internal resonance upward toward the sound hole, "like a parabolic mirror," according to the German seller RISA, whose Koki'o brand line of ukuleles all feature arched backs. See also Archtop mandolins were developed at the same time for similar reasons. References Bibliography Robert Benedetto: Making an Archtop Guitar External links Girasoli Parlor Jazz Guitar – Downloadable plans for a small-bodied archtop guitar designed by R. M. Mottola, on the Liutaio Mottola Lutherie Information Website. Specialist archtop dealer The Archtop Jazz Guitar by Fernando Alonso Jaén Archtop Guitars in Jazz Blues instruments Guitars Rockabilly instruments it:Tipi di chitarra elettrica#Archtop