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Amplifier Output Calculator

by Benchmark Media Systems November 23, 2022

Amps Calculators dBu Noise SNR SPL Vrms Watts

Amplifier Output Calculator

Results update on input change.

Enter Speaker Impedance: Ohms

Enter Power into Above Load: Watts

Results

Output Level: dBu

Output Voltage: Vrms

Peak Voltage: Volts Peak

Peak to Peak Voltage: Vpp

Output Current: Amps RMS

Peak Current: Amps Peak

Amplifier Output Noise Calculator

Results update on input change.

Enter Rated Power into 8 Ohms: Watts

Enter Signal to Noise Ratio (SNR): dB

Results

Output Level: dBu

Output Voltage: Vrms

Output Noise Level: dBu

Output Noise Voltage: uV RMS

Output Noise Power: dBW

SNR at 1W Output: dB

Amplifier + Speaker Output Calculator

Results update on input change.

Enter Amplifier Power Per Channel into 8 Ohms: Watts

Enter Amplifier SNR: dB

Enter Speaker Sensitivity: dB SPL (2.83 V, 1 M)

Enter distance from Speaker(s): Meters

Select Number of Speakers:

One Speaker Two Speakers

Select Room Configuration:

Anechoic Chamber or Large Open Space

Typical Listening Room

Speakers mounted on or in front wall

Contributing Factors

Gain from amplifier: dB (relative to 2.83 V)

Gain from single loudspeaker: dB

Gain from multiple loudspeakers: dB

Loss due to distance: dB (relative to 1 meter)

Gain from room reflections: db (typical - may vary)

Results

Peak Music Level (at listening position): dB SPL (at listening position)

Amplifier Noise Level: dB SPL (at listening position)

Audibility

Amplifier Noise is absolutely inaudible if Noise SPL level is negative.

Amplifier Noise may be audible if Noise SPL level is positive.

Does not include noise of devices feeding the power amplifier.

Will the THD+N Produced by My System be Audible?

Enter the THD+N of the worst component in your signal chain.
Enter the voltage sensitivity of you speakers.
Enter the rated output power of your amplifier.
Choose your listening configuration.
View the result!
If the result is less than 0 dB SPL, the THD +N produced by your electronics will be absolutely inaudible.

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

THD % to dB Converter

Results update on input change.

Enter THD in %:

Results

THD: dB

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

THD+N Audibility Calculator

Results update on input change.

Enter Amplifier Power Per Channel into 8 Ohms: Watts

Enter THD+N: dB

Enter Speaker Sensitivity: dB SPL (2.83 V, 1 M)

Enter distance from Speaker(s): Meters

Select Number of Speakers:

One Speaker Two Speakers

Select Room Configuration:

Anechoic Chamber or Large Open Space

Typical Listening Room

Speakers mounted on or in front wall

Contributing Factors

Gain from amplifier: dB (relative to 2.83 V)

Gain from single loudspeaker: dB

Gain from multiple loudspeakers: dB

Loss due to distance: dB (relative to 1 meter)

Gain from room reflections: db (typical - may vary)

Results

Peak Music Level (at listening position): dB SPL (at listening position)

Peak THD+N Level: dB SPL (at listening position)

Audibility

THD+N is absolutely inaudible if THD+N SPL level is negative.

THD+N may be audible if THD+N SPL level is positive.

Read the complete instructions for the THD+N Audibility Calculator

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Gain Calculator

by Benchmark Media Systems February 15, 2024

Calculators dB Gain Volts

Gain Calculator

Results update on input change.

Enter Input Voltage: Volts

Enter Output Voltage: Volts

Results

Gain: dB

Output Voltage Calculator

Results update on input change.

Enter Input Voltage: Volts

Enter Gain: dB

Results

Output Voltage: Volts

Read Full Post

THD Calculator

by Benchmark Media Systems November 29, 2022

Calculators dB THD

THD % to dB Converter

Results update on input change.

Enter THD in %:

Results

THD: dB

THD dB to % Converter

Results update on input change.

Enter THD in dB:

Results

THD: %

Read Full Post

Volts RMS to dBu Converter

by Benchmark Media Systems November 23, 2022

Calculators dBu Vrms

Volts RMS to dBu Converter

Results update on input change.

Enter Volts RMS:

Results

Peak to Peak Voltage: Vpp

Volts in dBv: dBv

Level in dBu: dbu

dBu to Volts RMS Converter

Results update on input change.

Enter level in dBu:

Results

Peak to Peak Voltage: Vpp

Volts in dBv: dBv

Volts RMS: Vrms

Read Full Post

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Questions?

Amplifier Output Calculator

Amplifier Output Calculator

Results

Amplifier Output Noise Calculator

Results

Amplifier + Speaker Output Calculator

Select Number of Speakers:

Select Room Configuration:

Contributing Factors

Results

Audibility

Will the THD+N Produced by My System be Audible?

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

THD % to dB Converter

Enter THD in %:

Results

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

THD+N Audibility Calculator

Select Number of Speakers:

Select Room Configuration:

Contributing Factors

Results

Audibility

Also in Audio Calculators

Gain Calculator

Gain Calculator

Results

Output Voltage Calculator

Results

THD Calculator

THD % to dB Converter

Enter THD in %:

Results

THD dB to % Converter

Enter THD in dB:

Results

Volts RMS to dBu Converter

Volts RMS to dBu Converter

Results

dBu to Volts RMS Converter

Results