Mandobass
The Mandobass is an instrument similar to the double bass. It is in related to the mandolin, and like the mandolin (and the lute), it is usually plucked. The most common version has four strings, which are usually tuned to  E1–A1–D2–G2.  Another version exists, which is tuned to G1–D2–A2–E3; this is two octaves lower than the mandolin.