A stereo amplifier has an input power of 0.750 W and an output power of 25.0 W. What is the power gain? (See Example 4.)

Data from Example 4

The power gain G [in decibels (dB)] of an electronic device is given by G = 10 log(P₀/P_i), where P₀ is the output power (in W) and P_i is the input power. Determine the power gain for an amplifier for which P₀ = 15.8 W  and P_i = 0.625 W. Substituting the given values, we have

The second line of the display in Fig. 13.12 shows this evaluation on a calculator.

Transcribed Image Text:

15.8 0.625 G = = 10log. = 14.0dB