Discussion
Doubling an amplifier's output power is a rise of about
Answer: D
Applying the same convention:
\[ 10 \log_{10} 2 \approx 3 \ \mathrm{dB} \]
giving about 3 dB, which is barely perceptible as a change in loudness. Six decibels would be a doubling of voltage, which is a quadrupling of power. That a doubling of amplifier power buys so little audible difference is why loudspeaker sensitivity usually matters more than amplifier rating in a practical system.
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