Audio Calculators

Click "Read Full Post" for a tutorial and an advanced calculator that includes adjustments for the number of speakers, the listening distance, and the room configuration.

The default settings show the stereo output into 8 Ohms.

Select "Bridged Mono" and "4 Ohms" to see the maximum 4-Ohm bridged-mono output power for the AHB2. This maximum output power will be achieved at an input level of 20.1 dBu (reduce the input level by entering 20.1).

Note: If the input parameters would cause clipping, the results show the maximum un-clipped output, and the "Amplifier Headroom" window will read "Amplifier Clipping!". When this occurs, reduce the "Input Level" to achieve an "Amplifier Headroom" of 0 dB.

Click "Read Full Post" for an advanced calculator which calculates SPL at the listening position when using an AHB2 power amplifier.

Calculate the combined system performance of a Benchmark audio system using a DAC3 D/A converter, LA4 line amplifier, and AHB2 power amplifier.

Note: If the input parameters would cause clipping, the results show the maximum un-clipped output, and the "Amplifier Headroom" window will read "Amplifier Clipping!". When this occurs, reduce the "Input Level" to achieve an "Amplifier Headroom" of 0 dB.

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.