Crown Audio has made available a range of tools to assist Audio Engineers and Technicians alike when designing audio systems to suit a particular application or environment.
For example, they have a dB Power Ratio Tool to calculate the ratio, in decibels, between two power values, so you can calculate the difference in dB between two amplifiers with different power output specifications.
There is also an Amplifier Power Required Tool that provides the required electrical power (power output 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 the clip.
Example: You are designing a system where the farthest listening position from the loudspeaker is 100 meters, and the desired Sound Pressure Level is 85 dB SPL The loudspeaker chosen for the job has a sensitivity rating of 95 dB. With the minimum recommended amplifier headroom of 3 dB, then you need to choose an amplifier that can supply at least 1,995 watts to the loudspeaker.
For all the Crown Audio Design Tools, follow the link here: