Dave Smith Instruments OB-6 Now Shipping The OB-6 by Dave Smith Instruments is now shipping. The OB-6 is a once-in-a-lifetime collaboration between the two most influential designers in poly synth history, Dave Smith and Tom Oberheim. The OB-6 takes the classic bold Tom Oberheim sound — with its true voltage-controlled oscillators, 2-pole filter, and amplifiers — [...]