低胡是低音二胡的简称，1930年代开始研发，材料与结构跟二胡相同，体积较中胡大，在引入大提琴和低音提琴之前，用以填补国乐团中低音声部的过渡乐器。因其音响效果不完善，而且拉奏不便，20世纪末开始式微，在民族乐团中被大提琴（或革胡）和低音提琴（低音革胡）所取代，现在仍被用潮州音乐等。

低胡有以下三种：

潮州音乐自20世纪30年代以后使用低胡和广东高胡，潮语称低胡为大冇弦，称高胡为提弦（就是提琴），潮语的冇弦是指椰胡。

The dihu (低胡, pinyin: dīhú) is a large bowed string instrument from China. It has a large soundbox covered on one end with snakeskin. Like most other members of the huqin family of instruments, it has two strings and is held vertically. The instrument's name derives from "dī," meaning "low," and "hú" (short for huqin).