Model I8SM IP speaker from Atlas Sound consists of a factory assembled loudspeaker/ baffle/ microphone with PCB amp/ control board securely mounted to the rear of the baffle via concealed weld studs.The amp/ control board is capable of producing 9 Watts RMS into the 8 Ohm loudspeaker with 9VDC minimum power provided by IEEE 802.3AF compliant POE switches. (local 12-18VDC PSUs may also be used instead of POE switches). Interconnection is via a board mounted female RJ-45 connector.The industry standard C10A loudspeaker used in the I8SM is a dual cone 8" (205mm) loudspeaker with a 10oz (260g) ceramic magnet. It includes a curvelinear paper cone for lower harmonic distortion. The loudspeaker is also equipped with a full 1" (25mm) diameter copper voice coil with aluminum former for better heat dissipation.