Tiptop Audio BD808, Drum Module, TR-808 Bassdrum clone for modular systems, Controls for Level, Tone, Decay and Accent, Powerful output gain stage that generates signals up to 20 Vpp, If no Accent In is patched, the accent poti acts to adjust the output level, Width: 4 HP, Depth: 14 mm, Power requirements: +13 mA (+12 V) / -6 mA (-12 V)