Specifications include, but are not limited to: 2.2.2.1 Perform a physical check of all amplifiers, distribution equipment and emergency paging equipment. This includes energizing the system, passing a signal through the amplifiers and verifying the system has output. Contractor is to perform any standard preventative maintenance recommended by the manufacturers of the equipment included in the system and follow the preventative maintenance tasks issued by the Owner. 2.2.2.2 Insure that all equipment in the Main Audio Amplifier Room (D4 Upper Press Level)and the four (4) satellite amplifier rooms are clean and free of dust. Contractor is to clean/vacuum system equipment and equipment filters as necessary. 2.2.2.3 Perform a physical inspection of all speakers. This should include a check of the condition of all enclosures, including seals and gaskets.