1. What is Headphone Power Test?

The Headphone Power Test calculates the power delivered to headphones based on voltage and impedance. This measurement helps determine if an audio source can adequately drive a particular pair of headphones.

2. How Does the Calculator Work?

The calculator uses the headphone power formula:

Where:

• \( V_{\text{rms}} \) — RMS voltage (volts)
• \( R \) — Headphone impedance (ohms)
• 1000 — Conversion factor to milliwatts

Explanation: The equation calculates power in milliwatts by squaring the RMS voltage, dividing by impedance, and converting to milliwatts.

3. Importance of Power Calculation

Details: Proper power calculation ensures headphones receive sufficient power for optimal performance without distortion or damage to the equipment.

4. Using the Calculator

Tips: Enter RMS voltage in volts and headphone impedance in ohms. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good power level for headphones?
A: Most headphones need 1-50 mW, with high-impedance models requiring more. Check your headphone specifications.

Q2: How do I measure Vrms?
A: Use a true RMS multimeter or audio analyzer at the headphone output with a test tone (typically 1kHz).

Q3: Does this work for all headphone types?
A: Yes, the calculation applies to dynamic, planar magnetic, and electrostatic headphones (though electrostatics have special requirements).

Q4: Why convert to milliwatts?
A: Headphone power is typically measured in milliwatts as it provides more convenient numbers for comparison.

Q5: What about current and power factor?
A: This simplified calculation assumes purely resistive load. Complex impedance may require additional measurements.