This is an early model Empress ParaEQ. It's a rare, true early model, and it's said to have a thicker sound compared to later versions because it lacks the boost switch. Also, the voltage can be changed via DIP switches inside the unit to: 9-11V, 12-17V, or 18-24V. Operation has been confirmed. There is some crackling in the boost knob. Regarding the appearance, there is some wear and tear. Also, one of the rubber feet is missing. Unit only.