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Amp Gain Calculator
American Bass Audio
Calculate the target voltage to set your amplifier gain correctly using a multimeter and test tone.
Beta⚠️ Beta Tool: This calculator is for informational purposes only. Incorrect gain settings can damage equipment. Verify all specs and consult a professional if unsure.
TARGET VOLTAGE (AC)
—V
Enter your amp and sub specs below
⚠️
Amp Settings
Bridged Mode
Two channels combined into one
Strapped Monoblocks
Two mono amps combined
Use rated power at your impedance
Sub Settings
Total load seen by amplifier
Combined RMS of all connected subs
POWER USED FOR CALCULATION
— W
How to Set Gain
1
Set all EQ and bass boost to flat/zero
Turn off any bass boost on amp and head unit. Set EQ flat.
2
Play a test tone (40-50Hz sine wave)
Use a test tone CD, USB, or app. Set head unit to about 75% volume.
3
Set multimeter to AC Volts
Connect probes to speaker output terminals on amplifier.
4
Adjust gain until voltage matches target
Slowly turn gain up until multimeter reads — VAC.
⚠️ Important: Incorrect gain settings can damage your amplifier and subwoofers. Always verify your equipment's power ratings before proceeding. If you hear distortion, reduce the gain immediately.
FORMULA
V = √(P × R)
=
CALCULATION
√(— × —)
=
RESULT
— VAC
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