This calculator provides the required electrical output power from the amplifier to produce a desired Sound Pressure Level (SPL) at a given distance, along with an amount of headroom to keep the amplifier(s) out of clip.

Listener Distance from source		meters	Desired Level at Listener position		dB SPL
Loudspeaker Sensitivity Rating		dB (1Watt/1meter)	Amplifier Headroom		dB
			Required Amplifier Power		Watt

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