Amplifier Power & SPL Calculator

SPL from Amp Power

Speaker Sensitivity:

Amplifier Power:

Distance:

Environment:

110.0 dB SPL

Maximum SPL at specified distance

Required Amp Power

Target SPL:

Speaker Sensitivity:

Distance:

Headroom:

63.2 Watts

Required amplifier power (with headroom)

Multiple Speaker Arrays

Single Speaker SPL:

Number of Speakers:

1 2 4 8 16

100.0 dB SPL

Total array SPL (+0.0 dB coupling gain)

Speaker Comparison

Speaker A

Sensitivity:

Power:

Speaker B

Sensitivity:

Power:

Speaker	SPL @ 1m	Difference
Speaker A	110.0 dB	0.0 dB
Speaker B	115.0 dB	+5.0 dB

Ohm's Law for Audio

Voltage (V):

Current (I):

Power (P):

Impedance (Z):

-- V

Voltage

-- A

Current

-- W

Power

-- Ω

Impedance

Series/Parallel Impedance

Configuration:

Speaker Impedance:

Number of Speakers:

4.0 Ω

Total load impedance

Amplifier Damping Factor

Speaker Impedance:

Amp Output Z:

Cable Length:

Cable Gauge:

48.8

Damping factor (higher is better)

Wire Gauge Calculator

Power:

Impedance:

Distance (one way):

Max Power Loss:

12 AWG

Recommended minimum wire gauge

Common Speaker/Amp Presets

Speakers

Amplifiers

Visual SPL Reference

dB ↔ Pascal Converter

Convert between Sound Pressure Level (dB SPL) and Sound Pressure (Pascals)

Sound Pressure (Pa)

Sound Pressure Level (dB SPL)

Reference: 20 μPa (0.00002 Pa)

Typical Values

Threshold of hearing 0 dB = 20 μPa Quiet room 30 dB = 0.63 mPa Normal conversation 60 dB = 0.02 Pa Busy street traffic 80 dB = 0.2 Pa Rock concert 110 dB = 6.3 Pa Threshold of pain 130 dB = 63 Pa

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