Speco Technologies Nexus Contractor Speakers Commercial Line utilizes premium quality components to provide a network of sound and paging for even the most demanding commercial environments. The high-end NXC Series features heavy-duty, industrial metal back cans that provide component protection and safety while enhancing the speakers full-range bass sound. Removable "Quick-Snap" connection terminals provide easy access and optimal angles for connecting speaker wire. A wattage selector dial simplifies transformer settings. Mounted security loops allow for a support cable run and ceiling support brackets are included. Most importantly, these speakers have met or exceeded the strict UL 1480 requirements for fire safety. Also known as -Speco (Av) 6.5 UL METAL BRKT SPKRS, PAIR - SO-SP6NXCTUL-Speco - Sp6nxctul - 6.5 Ul Listed Metal Backcan Speakers W/ 70v Transformer Brac