The legendary Roland TR-808. It's used in almost every form of dance music from disco to house to hip-hop.
The Roland TR-808 Rhythm Composer was one of the first programmable drum machines ("TR" serving as an initialism for Transistor Rhythm). Introduced by the Roland Corporation in late 1980, it was originally manufactured for use as a tool for studio musicians to create demos. Like earlier Roland drum machines, it does not sound very much like a real drum kit. Indeed, because the TR-808 came out a few months after the Linn LM-1 (the first drum machine to use digital samples), professionals generally considered its sound inferior to sampling drum machines; a 1982 Keyboard Magazine review of the Linn Drum indirectly referred to the TR-808 as sounding like marching anteaters. However, the TR-808 cost US$1,000 upon its release, which was considerably more affordable than the US$5,000 LM-1
Free 808 Drum Kit Download