Notifier EQBB-D4 Cabinet Backbox AssemblyEQ Series cabinets provide an effective solution for applications that require distributed components such as power supplies, amplifiers, and multiple I O modules. The EQ Series provides superior ventilation for devices such as amplifiers and field power supplies, ample room for wire or fiber optic media between each row, and a space efficient package that allows for the consolidation of multiple system components in a single enclosure.