Audio Calculators

THD Calculator

by John Siau November 29, 2022 1 min read

Calculators dB THD

THD % to dB Converter
	% THD

RESULTS
	dB THD

THD dB to % Converter
	dB THD

RESULTS
	% THD

Click "Read More" for a tutorial.

Volts RMS to dBu Converter

by John Siau November 23, 2022 1 min read

Calculators dBu Vrms

Volts RMS to dBu Converter
	Volts RMS

RESULTS
	dBv
	dBu

dBu to Volts RMS Converter
	dBu

RESULTS
	dBv
	Volts RMS

Gain Calculator

by John Siau November 23, 2022 1 min read

Calculators dB Gain Volts

Gain Calculator
Input Voltage:	Volts
Output Voltage:	Volts

RESULTS
Gain:	dB

Output Voltage Calculator
Input Voltage:	Volts
Gain:	dB

RESULTS
Output Voltage:	Volts

Watts to Decibel-Watt Conversions

by John Siau November 23, 2022 1 min read

Calculators dB dBm dBW Watts

Watts to dBm and dBW
	Watts

RESULTS
	dBm (dB milliwatts)
	dBW (dB Watts)

dBW to dBm and Watts
	dBW (dB Watts)

RESULTS
	dBm (dB milliwatts)
	Watts

Click "Read More" for more power conversion calculators.

Peak SPL Calculator

by John Siau November 23, 2022 3 min read

Calculators Sensitivity SPL

PEAK SPL CALCULATOR
Speaker Sensitivity:	dB SPL (2.83 V, 1 M)
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.

Amplifier Output Calculator

by John Siau November 23, 2022 1 min read

Amps Calculators dBu Noise SNR Vrms Watts

Amplifier Output Calculator
Speaker Impedance:	Ohms
Power into Above Load:	Watts

RESULTS
Output Level:	dBu
Output Voltage:	Volts RMS
Peak Voltage:	Volts Peak
	Volts Peak to Peak
Output Current:	Amps RMS
Peak Current:	Amps Peak

Amplifier Output Noise Calculator
Rated Power into 8 Ohms:	Watts
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

AHB2 Output Calculator

by John Siau November 23, 2022 1 min read

AHB2 Calculators dBu dBW SPL Vrms Watts

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

RESULTS
Output Voltage:	Vrms
Output Level:	dBu
Relative Output Level:	dB relative to 2.83V
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.

Benchmark System Calculator

by John Siau 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
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)
LA4 Volume Setting:	dB
AHB2 Amplifier Mode:	Stereo
	Bridged Mono
Speaker Sensitivity:
	dB SPL (2.83 V, 1 meter)
	dB SPL (1 Watt, 1 meter)
Speaker ohms:	4 Ohms
	8 Ohms
Distance from Speaker(s):	meters
Number of Speakers:	One Speaker
	Two Speakers
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

Benchmark HPA4 Calculator

by John Siau November 16, 2022 1 min read

Calculators dBm dBV Headphone Amplifier HPA4 SPL

BENCHMARK HPA4 CALCULATOR
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)
HPA4 Volume Setting:	dB
Headphone Sensitivity:
	dB SPL @ 1 mW
	dB SPL @ 1 Vrms
Headphone Impedance:

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)

Speaker Sensitivity Converter

by John Siau November 16, 2022 1 min read

Calculators Sensitivity SPL

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

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

Click "Read More" for a tutorial.

Headphone Sensitivity Converter

by John Siau November 16, 2022 1 min read

Calculators Headphone Amplifier Sensitivity SPL

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

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

THD+N Audibility Calculator

by John Siau November 16, 2022 4 min read

Calculators Noise Sensitivity SPL THD

THD+N AUDIBILITY CALCULATOR
THD+N:	dB
Speaker Sensitivity:	dB SPL (2.83 V, 1 M)
Amplifier Power Per Channel into 8 Ohms:	Watts
Distance from Speaker(s):	meters
Number of Speakers:	One Speaker
	Two Speakers
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.

ENOB Calculator

by John Siau November 16, 2022 2 min read

Calculators ENOB SINAD SNR

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

RESULTS
ENOB:	bits
(Effective Number of Bits)

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

RESULTS
SNR:	dB
(Signal to Noise Ratio)

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

SNR to Output Noise Calculator

by John Siau November 16, 2022 2 min read

Calculators DAC3 Noise SNR

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

RESULTS
Output Noise Level:	dBu
Output Noise Voltage:	uV

SNR to Output Noise Calculator
Output Signal Voltage:	Vrms
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.

Uncorrelated Noise Summation

by John Siau November 15, 2022 3 min read

Calculators dB Noise SNR SPL

Noise Summation
Noise Level 1:	dB
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
Noise Voltage 1:
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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