The AtlasIED IP-SA incorporates the 8" model C803A coaxial speaker and a square grille finished in white epoxy. The IP-SA is designed to be used in conjunction with an AtlasIED IPX series speakers in applications where two speakers are required but expense is a factor. There is an 8Ω speaker output terminal on the PCB in the IPX speaker that can be connected to the speaker input on the IP-SA. This will provide signal and power from the IPX speaker to the IP-SA allowing for greater sound coverage and reduced expense. The IP-SA can be used with the same surface and flush mount enclosures used by Atlas IPX speakers, the IP-SEST-S, IP-SEA-S, andIP-FEST-S, for ceiling mount the IP-STB tile bridge or IP-STBE tile bridge w/ enclosure. For IPX firmware updates, please contact AtlasIED tech support at 1-800-876-3333 or [email protected] Different systems require different solutions. Our tech support team will quickly ensure that you receive the updates that will keep your unique system running smoothly!