Bass banjo
There are multiple instruments referred to as a bass banjo. The first to enter real production was the five-string cello banjo, tuned one octave below a five-string banjo. This was followed by a four-string cello banjo, tuned CGDA in the same range as a cello or mandocello, and modified upright bass versions tuned EADG. More recently, true bass banjos, tuned EADG and played in conventional horizontal fashion, have been introduced.Five-string cello banjo
The five-string cello banjo was originally a gut-stringed instrument with a deep diameter rim, marketed by S.S. Stewart in 1889. Advertising copy used the terms "bass banjo" and "cello banjo" to refer to the same instrument.
Other banjo makers manufactured similar instruments, including A.C. Fairbanks, with a diameter head and a scale length and A.A. Farland, with head and a scale. Gold Tone is the only contemporary manufacturer.Four-string cello banjo
In 1919, Gibson began manufacturing a 4-string cello banjo, known as the CB-4. Other vintage manufacturers of four-string bass banjos include Bacon & Day. Gold Tone is the only contemporary manufacturer.Gibson bass banjo
Gibson produced a separate instrument called a "bass banjo" from 1930 to 1933. This was a 4-string instrument, played as an upright bass, with a stand substituting for a spike. It was tuned EADG, the same as Gibson's mando-bass.Bassjo
The Bassjo, also referred to as the banjo bass in a 2006 article featuring Les Claypool on the cover of Bassplayer Magazine was made by luthier Dan Maloney. Maloney was a friend of Claypool's approximately ten years ago when Claypool asked him to construct a guitar with "a banjo body and a bass neck." The Bassjo can be heard on Claypool's 2006 album Of Whales and Woe on the track "Iowan Gal", as well as Primus' "Captain Shiner" from the album Tales from the Punchbowl.The bass banjolele, is often made by individual luthiers and is without much mainstream use and production. They are often tuned E1–A1–D2–G2. It is often just another version of a U-bass. It is often slightly longer than a U-bass.Gold Tone bass banjo
produces a commercial version of the bass banjo. It has a scale and a pot.Heftone upright
An unusual variation is the Heftone bass, which combines a large, banjo pot with an upright spindle to produce an upright bass banjo.