- Finely perforated grille over the entire front of speaker- Fully enclosed industrial grade steel construction- Enclosed Back Can- 8 main cone with secondary high-frequency cone- Low-impedance: 8-ohm speaker 15W max. power- Seismic attachment points- Complies with Requirements of UL-2043- Support Rail Crossbar (included)- Available in Off-white and Bright White ( U versions) grille finish