heavy duty, industrial and commercial speakers are designed to meet the requirements for public address, voice alarm (evacuation) and background music. The speakers can generally operate as stand-alone units, or as part of 100 or 70 volt line systems.
Additionally a wide range of sound output levels (dB / Watts) are available. The speakers sound output in dB(A) is measured to European standards at 1 watt / 1 metre.
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