Spec Sheet Preview: The Alpha Communications® IH151N is designed to house and protect system amplifier, power supplies, and transformers from damage due to vandalism, or other job-site conditions. It is also used to protect the system wiring splices and connections from accidental damage by non-authorized personnel. These equipment cabinets surface mount right onto the wall, and have electrical knock-outs (KO's) on four (sides) for easy tubing connections. A 7 inch (178mm) long welded piano hinge assures positive door cover opening and closing.& …