Tiptop Audio CR909, Drum Module, Dual Voice Module, which contains the original TR-909 Crash and Ride circuits, Sound generation using low-fi samples sent through analog filters and envelopes, Manual and voltage-controlled tuning of the sample (VC-Tune), Width: 8 TE / HP, Depth: 46 mm, Power requirement: +60 mA (+12 V) / -40 mA (-12 V)