I am wondering about how amplifier power is measured.

## Summary

- Does amplifier power measurement consider frequency energy content?
- Is there a correlation between frequency and energy distribution in music?
- Impedance and phase angle impact power delivery to speakers.
- Power and energy remain constant across frequencies for audio signals.

## Discussion

When discussing the measurement of amplifier power in audio systems, it raises intriguing questions about the energy content across various frequencies. The relationship between frequency and power delivery is essential to understand to optimize audio performance.

## Understanding Amplifier Power

Amplifier power is commonly specified in terms of RMS wattage over a frequency range, such as 20-20,000 Hz. There is a fundamental law of physics stating that energy content increases with frequency for a constant wave amplitude.

## Impact of Impedance

While the relationship between frequency and energy content seems straightforward, the actual power delivery to speakers is influenced by impedance. Unlike resistors, speakers exhibit phase angles that can affect power consumption. Manufacturers often estimate impedance as a nominal value to simplify calculations.

## Consistency in Power and Energy

Feedback from the community emphasizes that power delivery remains constant across frequencies for sinusoidal signals. The drive voltage to the load produces the same current at any frequency, leading to consistent power output. This understanding is crucial for ensuring uniform audio performance.