When paired with the new CyberData SIP Paging 25V/70V +4 Amplifier, the Analog Ceiling Speakers 24V/70V/8 Ohm offer a cost-effective solution that significantly extends the sound coverage area. The speaker offers the option of constant voltage at either 25 or 70 volts as well as traditional 8 )hm setting. Each speaker is configured with 5 power tap settings. Easy to install, multiple speakers can tee off a single home run cable to the SIP Paging 24V/70V +4 Amplifier. Features - Supports 25V, 70V or traditional 8 Ohm power input - Multiple power tap settings for desired dB output - Designed for good speech intelligibility - Suitable for backgroun music - High efficiency speaker driver - Easy installation - Seismic tether bracket for addition stability