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How do I calculate the input sensitivity for my application?
Input sensitivity is determined by the desired output power, the impedance of the speaker, and the gain of the amplifier. Naturally, the desired output power cannot exceed the amplifier's rated maximum. In this example, the input sensitivity for a 400W output at 4 ohms is calculated. The gain and maximum output power are specified in the datasheet. The speaker load depends on the user's application.