Vibiemme Double Domobar Espresso Machine - V4 - ManualVibiemme Double Domobar Espresso Machine V4 Manual The Double Domobar makes it possible to get just as much quality out of your espresso machine as you demand of your espresso. This dual boiler model represents a design achievement from the Vibiemme team. The advantage of a double boiler system in this machine lets you operate each one independently. A PID gives you even more control, as it can be used to adjust the coffee boilers temperature to make