The Ensoniq SQ-80 is a digital/analog synthesizer manufactured from 1987 to 1989. It was Ensoniq's update to its first synth, the Ensoniq ESQ-1. Compared to the ESQ-1, the SQ-80 includes 43 additional waveforms (including five drumkits), an enhanced sequencer, and a floppy disk drive for storing patches and sequences. Synthesis-wise, the SQ-80 introduced the so-called 2nd Release, a low-cost solution to simulate reverb-like effects. In contrast to the ESQ-1, the SQ-80 not only offers MIDI in and out, but also MIDI thru jacks.