How To: Clamp your amplifier for true wattage

Hey world thanks for stopping by. Today I have a video showing how to clamp your amplifier for power output. You will need a clamp style multimeter (i used 2 different ones to make things easier) and the equation is Amps AC x Volts AC = wattage. You can also find impedence by doing Volts AC / Amps AC = Ohms so you can calculate rise. The Amps are found by clamping ALL + SPEAKER LEADS and the Volts is found by putting positive and negative meter leads on the speaker positive and negative. I used a 40 Hz test tone for this, but you can do this with music as well. Any questions or comments post them!
edit: DO NOT MULTIPLY AC VOLTAGE NO MATTER HOW MANY SPEAKERS ARE WIRED IN. after feedback i have been heard that is not correct.

Category:

Autos & Vehicles

Tags:

• amp
• clamp
• meter
• mplifier
• speaker
• volts
• ac
• amps
• subwoofer
• car audio
• wattage
• rms
• watts
• test
• tone
• sound
• system
• bass
• electronics
• wireless
• diy
• settings
• true
• wire
• speakers
• 1/0
• 12
• gauge
• install

[thegreatestpenn]

fluke brand is the most respected out there

[thegreatestpenn]

subs were wired to 1ohm so that's just ac volts / ac amps

[thegreatestpenn]

It is rated for 3100wrms @1ohm.  It is wired to 1ohm, but I didn't do the test at max gain.

[TheBlockshaker]

so it put out 329rms at 2.8 ohms right? what clamp meter could i need? i have a 4000watt amplifier crescendo audio

[turboboy0]

if you hate doing math just download one of the ohms law calculator apps from the app store for free. that is what i did for my droid and iphones

[subbinblazer]

What was your box rise?

[buildthebobber1]

your way will work too lol,just a heads up on a more accurate calculation

[buildthebobber1]

hey Will,there is a more accurate calculation for power its ac volts/ ac amps gives imp. then you do ac volts squared/imp gives power

[ji553r]

wow dude i have the same, exact, calculator!

[basslh]

Great tips from a great guy. 

[clickclakblastem52]

good stuff man