This is a used Ensoniq DP4 multi-FX processor.

The Ensoniq DP4 is a powerful parallel FX processor, utilising 4 discrete processors each capable of producing 24bit stereo effects. Just one processor on its own produces some incredible effects, but four in combination provides a whole new level to FX processing!

This particular Ensoniq DP4 is in excellent condition.

Please note this is a 110V model, so users in the UK and Europe will need a step down transformer to power it.