The Poly D is based largely on the Moog Minimoog, which was first produced from 1970-1981.

The Poly D is the sixth such vintage synthesizer that Behringer has cloned.

These synths were in turn followed the Neutron, Crave, TD-3 and Model D. On November 27, 2019, Behringer announced that they would be releasing the Poly D, though at the time only pre-orders were available from Thomann.

The oscillators are analog, not digital, and thus require occasional tuning.

The marketable differences from the Minimoog lie in the addition of aftertouch, the BBD Stereo Chorus, DS-1 modeled distortion circuit, Behringer arpeggiator and 32 step sequencer, and the aforementioned switchable voice modes.