Audio Calculators

Click "Read Full Post" for instructions and a video tutorial.

Use this tool to convert between power sensitivity and voltage sensitivity

• Speaker Power Sensitivity is specified as: dB SPL (1 watt, 1 meter)
• Speaker Voltage Sensitivity is specified as: dB SPL (2.83 V, 1 meter)

These values will be identical for 8-Ohm speakers, but they will be different at other impedances.

• 1 Watt into an 8-Ohm speaker will require 2.83 volts.
• 1 Watt into a 4-Ohm speaker will require just 2 volts.
• The ratio between 2.83 volts and 2 volts is 3.01 dB.

This means that if a 4-Ohm and and 8-Ohm speaker have identical efficiencies, the 4-Ohm speaker will play 3.01 dB louder with a given voltage.

Step 1 - Use this calculator to convert THD or THD+N from percent to dB (if necessary)

Step 2 - Use this calculator to compute the sound pressure level (SPL) of THD or THD+N

Click "Read Full Post" for a tutorial and a more advanced version of this calculator.