Description
CPG Signals Model SPHX PowerTone Explosion-proof Speaker is designed for use in hazardous locations. The unit produces a crisp, clear, high decibel tone/voice output. Tones may be generated by the PowerTone Signaling System or any 25 Vrms or 70 Vrms tone/voice audio system.

The speaker cone and projector are of spun aluminum. The speaker driver and circuitry are contained in a explosion-proof housing. The speaker has a supervisory DC coupling capacitor and wattage taps from 0.5 to 15 watts. The speaker is listed for indoor or outdoor use, is NEMA 3 rated, and is finished in red enamel. The PowerTone speaker is designed for connection to system supervised alarm notification circuits.

Application
The PowerTone speaker is well suited for signaling in hazard ous areas with high ambient noise levels where a high efficiency, weatherproof and corrosion-resistant surface mount speaker is required. The speaker is designed for locations where the danger of explosion or fire exists.

The speaker is suitable for use in National Electrical Code (NFPA 70): Class I, Groups B, C, and D, Division 1 hazardous locations. The speaker may be used with any 25 Vrms or 70 Vrms audio system. The speaker can be mounted indoor or outdoor. The SPHX is NEMA 3 rated.