The Alesis D4 is fully professional drum and percussion sound module. It featurs 500 drums sounds, sampled at 48kHz and stored on an internal ROM chip. The sounds cover the whole gamut, from great acoustic drum types to electronic drum sounds. Orchestral and ethnic percussion sounds and various percussive effects are also available. There are 21 programmable drum kits as well. And the D4 has full 16-channel MIDI implementation. The D4 has 12 trigger inputs allowing drummers to trigger its sounds from acoustic or MIDI pads. Engineers and musicians can also trigger drum sounds from the D4 using the trigger inputs and any external sound sources from tape or other studio gear. A hi-hat pedal jack allows use of a foot-switch to create more realistic hi-hat effects. There are also 4 independent outputs for either 4 mono outs or 2 stereo outs.

This particular Alesis D4 is in great condition. Has just minor signs of use. Has firmware version 1.01. Includes a third-party power adapter.