Elektron Monomachine
Akai S20
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It's a great 6 voice synthesizer with many ways of creating sounds/synthesis.
Sequencer is awesome, with only 1 pattern you can create so many variations in arranger mode using transpose, mute function, pattern length, pattern start and end points.
There is few machines (synthesizers) inside so the sound palette is great.
Unfortunately I got rid of it and got Octatrack instead, as I'm more sampling guy than synthesis geek.