The provided source material does not contain information regarding a city named Conga in Malawi. Instead, the source describes the conga (also known as tumbadora) as a tall, narrow, single-headed drum originating from Cuba.
Congas are staved like barrels and are classified into three distinct types: quinto, tres dos or tres golpes (middle), and tumba or salidor (lowest). Originally used in Afro-Cuban music genres such as conga and rumba where each drummer played a single drum, the instrument evolved during the mid-20th century to include configurations of two or three drums. Today, they are popular in various Latin music styles including son, descarga, Afro-Cuban jazz, salsa, songo, merengue, and Latin rock.