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CPG Signals Model SPHP PowerTone High Output Speaker producers a crisp, clear, high decibel tone/voice output. Tones may be generated by the PowerTone Signaling System or any 25Vrms or 70Vrms tone/voice audio system. The speaker cone and projector are of spun aluminum. The speaker circuitry is contained in dust and moisture proof sealed housing of die-cast aluminum. The speaker has a supervisory Dc coupling capacitor and wattage taps from 0.5 to 15 watts. The speaker is NEMA 3 rated, and is finished in red enamel. The PowerTone speaker is designed for connection to system supervised alarm notification circuits.