Audio Calculators

THD Calculator

by Benchmark Media Systems November 29, 2022 1 min read

Calculators dB THD

THD % to dB Converter
Enter THD in %:

RESULTS
THD: dB

THD dB to % Converter
Enter THD in dB:

RESULTS
THD: %

Click "Read More" for a tutorial.

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Volts RMS to dBu Converter

by Benchmark Media Systems November 23, 2022 1 min read

Calculators dBu Vrms

Volts RMS to dBu Converter
Enter Volts RMS:

RESULTS
Peak to Peak Voltage: Vpp
Volts in dBv: dBv
Level in dBu: dBu

dBu to Volts RMS Converter
Enter volts in dBu:

RESULTS
Peak to Peak Voltage: Vpp
Volts in dBv: dBv
Volts RMS: Vrms

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Gain Calculator

by Benchmark Media Systems November 23, 2022 1 min read

Calculators dB Gain Volts

Gain Calculator
Enter Input Voltage: Volts
Enter Output Voltage: Volts

RESULTS
Gain: dB

Output Voltage Calculator
Enter Input Voltage: Volts
Enter Gain: dB

RESULTS
Output Voltage: Volts

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Watts to Decibel-Watt Conversions

by Benchmark Media Systems November 23, 2022 1 min read

Calculators dB dBm dBW Watts

Watts to dBm and dBW
Enter W (Watts):

RESULTS
dBm (dB milliwatts)
dBW (dB Watts)

dBW to dBm and Watts
Enter dBW (dB Watts):

RESULTS
dBm (dB milliwatts)
Watts

Click "Read More" for more power conversion calculators.

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Peak SPL Calculator

by Benchmark Media Systems November 23, 2022 3 min read

Calculators Sensitivity SPL

PEAK SPL CALCULATOR
Enter Speaker Sensitivity: dB SPL (2.83 V,1 M)
Enter Amplifier Power Per Channel into 8 Ohms: Watts

RESULTS
Peak Output Level (at typical listening position): dB SPL

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

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Amplifier Output Calculator

by Benchmark Media Systems November 23, 2022 1 min read

Amps Calculators dBu Noise SNR Vrms Watts

Amplifier Output Calculator
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
Enter Rated Power into 8 Ohms: Watts
Enter Signal to Noise Ratio (SNR): dB

RESULTS
Output Level: dBu
Output Voltage: Volts RMS
Output Noise Level: dBu
Output Noise Voltage: uV RMS
SNR at 1W Output: dB

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AHB2 Output Calculator

by Benchmark Media Systems November 23, 2022 1 min read

AHB2 Calculators dBu dBW SPL Vrms Watts

AHB2 POWER and SPL OUTPUT CALCULATOR
Input Level: dBu Vrms	Amplifier Sensitivity: +22 dBu (Gain = 9.25 dB) 4 Vrms (Gain = 17 dB) 2 Vrms (Gain = 23 dB)
Amplifier Mode: Stereo Bridged Mono	Speaker Impedance: 4 Ohms 8 Ohms

RESULTS
Output Voltage: Vrms
Output Level: dBu
Relative Output Level: dB (relative to 2.83 V)
Output Power: dBW
Output Power: Watts
Amplifier Headroom: dB

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

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Benchmark System Calculator

by Benchmark Media Systems November 23, 2022 1 min read

AHB2 Calculators DAC3 HPA4 LA4 SNR SPL

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

BENCHMARK SYSTEM CALCULATOR
Select DAC Calibration: +24 dBu at 0 dBFS, XLR Input (Benchmark DAC) 4 Vrms at 0 dBFS, XLR Input (Typical HiFi Balanced) 2 Vrms at 0 dBFS, RCA Input (Typical HiFi Unbalanced)	Select AHB2 Amplifier Mode: Stereo Bridged Mono
Enter LA4 Volume Setting: dB
Enter Speaker Sensitivity: dB SPL (2.83 V, 1 Meter) (1 Watt, 1 Meter)	Select Speaker Impedance: 4 Ohms 8 Ohms
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
Amplifier Output Level: dB (relative to 2.83 V)
SPL from single loudspeaker: dB SPL (2.83 V, 1 meter)
Gain from multiple loudspeakers: dB
Loss due to distance: dB (relative to 1 meter)
Gain from room reflections: dB (typical - may vary)
RESULTS
Peak Output Level (at typical listening position): dB SPL
Amplifier Headroom (at Peak Output): dB
Amplifier Peak Output Power: Watts

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Benchmark HPA4 Calculator

by Benchmark Media Systems November 16, 2022 1 min read

Calculators dBm dBV Headphone Amplifier HPA4 SPL

BENCHMARK HPA4 CALCULATOR
Select DAC Calibration: +24 dBu at 0 dBFS, XLR Input (Benchmark DAC) 4 Vrms at 0 dBFS, XLR Input (Typical HiFi Balanced) 2 Vrms at 0 dBFS, RCA Input (Typical HiFi Unbalanced)
Enter HPA4 Volume Setting: dB
Enter Headphone Sensitivity: dB SPL @ 1 mW dB SPL @ 1 Vrms
Enter Headphone Impedance: Ohms

RESULTS
Amplifier Output Power: mW (at peak SPL)
Relative Output Power: dBm (dB relative to 1 mW)
Relative Output Level: dBV (dB relative to 1 Vrms)
Headphone Peak SPL: dB SPL
Amplifier Headroom: dB (at peak SPL)

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Speaker Sensitivity Converter

by Benchmark Media Systems November 16, 2022 1 min read

Calculators Sensitivity SPL

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.

Speaker Sensitivity Converter
Enter Speaker Sensitivity: dB SPL (1 W, 1 M) dB SPL (2.83 V, 1 M)
Enter Speaker Impedance: Ohms

RESULTS
Power Sensitivity: dB SPL (1 W, 1 M)
Voltage Sensitivity: dB SPL (2.83 V, 1 M)

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Headphone Sensitivity Converter

by Benchmark Media Systems November 16, 2022 1 min read

Calculators Headphone Amplifier Sensitivity SPL

Headphone Sensitivity Converter
Enter Headphone Sensitivity: dB SPL @ 1 mW dB SPL @ 1 Vrms
Enter Headphone Impedance: Ohms

RESULTS
Power Sensitivity: dB SPL @ 1 mW
Voltage Sensitivity: dB SPL @ 1 Vrms

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THD+N Audibility Calculator

by Benchmark Media Systems November 16, 2022 4 min read

Calculators Noise Sensitivity SPL THD

THD+N AUDIBILITY CALCULATOR
Enter THD+N: dB
Enter Speaker Sensitivity: dB SPL (2.83 V, 1 M)
Enter Amplifier Power Per Channel into 8 Ohms: Watts
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

RESULTS
Peak Music Level: 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.

Click "Read More" for a tutorial and a more advanced version of this calclulator.

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ENOB Calculator

by Benchmark Media Systems November 16, 2022 2 min read

Calculators ENOB SINAD SNR

SNR to ENOB CALCULATOR
Enter SNR: dB
(Signal to Noise Ratio)

RESULTS
ENOB: bits
(Effective Number of Bits)

ENOB to SNR CALCULATOR
Enter ENOB: bits
(Effective Number of Bits)

RESULTS
SNR: dB
(Signal to Noise Ratio)

Click "Read More" for a tutorial with interactive examples.

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SNR to Output Noise Calculator

by Benchmark Media Systems November 16, 2022 2 min read

Calculators DAC3 Noise SNR

SNR to Output Noise Calculator
Enter Output Signal Level: dBu
Enter Signal to Noise Ratio (SNR): dB

RESULTS
Output Noise Level: dBu
Output Noise Voltage: uV

SNR to Output Noise Calculator
Enter Output Signal Voltage: Vrms
Enter Signal to Noise Ratio (SNR): dB

RESULTS
Output Signal Level: dBu
Output Noise Level: dBu
Output Noise Voltage: uV

Click "Read More" for a tutorial with interactive examples.

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Uncorrelated Noise Summation

by Benchmark Media Systems November 15, 2022 3 min read

Calculators dB Noise SNR SPL

Noise Summation
Enter Noise Level 1: dB
Enter Noise Level 2: dB

RESULTS
Noise Sum: dB
Units may be dBFS, dBSPL, dBV,
dBu, dBm, dBW,
or dB relative to full output.
(All units must match)
Uncorrelated Noise Only

Noise Voltage Summation
Enter Noise Voltage 1:
Enter Noise Voltage 2:

RESULTS
Noise Voltage Out:
Units may be V, mV or uV
(All units must match)
Uncorrelated Noise Only

Click "Read More" for a tutorial with interactive examples.

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Audio Calculators

THD Calculator

Volts RMS to dBu Converter

Gain Calculator

Watts to Decibel-Watt Conversions

Peak SPL Calculator

Amplifier Output Calculator

AHB2 Output Calculator

Benchmark System Calculator

Benchmark HPA4 Calculator

Speaker Sensitivity Converter

Use this tool to convert between power sensitivity and voltage sensitivity

Headphone Sensitivity Converter

THD+N Audibility Calculator

ENOB Calculator

SNR to Output Noise Calculator

Uncorrelated Noise Summation

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