It was the first drum machine that was made by Yamaha and the first drum machine from the RX series.

Yamaha released their first digital drum machines in 1984.

The RX15 was a cut down version of the RX11, sharing some of the same sounds and features but missing out in key areas like individual outs.

The RX-11 holds 29 internal sounds stored in 6 ROMs of 256Kbit each.

They include 8 snare drums, 3 bass drums, 2 rimshots, 2 open and 2 closed hi-hats, 4 tom drums, hi-hat pedal, 2 hand claps, 2 cowbells, cymbal ride and crash and shaker[2]