how to calculate rms power at 4 ohms

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Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=121082
Printed Date: May 03, 2024 at 11:32 AM

Topic: how to calculate rms power at 4 ohms

Posted By: daniel gt1
Subject: how to calculate rms power at 4 ohms
Date Posted: March 30, 2010 at 1:40 PM

what's the formula for calculating watts on any amp..eg : a boss chaos 3000 mono block...I know you hav to add all the fuses and u do the maths... posted_image

Replies:

Posted By: smtgolf
Date Posted: March 30, 2010 at 2:03 PM

Check the power calculator page on this site

Power Calculators

Posted By: daniel gt1
Date Posted: March 30, 2010 at 2:18 PM

smtgolf wrote:

Check the power calculator page on this site

Power Calculators

There are three Current calculators bro...which one do i hav to use ?...

Posted By: ianarian
Date Posted: March 30, 2010 at 2:43 PM

Any 2 known values, can be used to calculate the 3rd value. In your case you want to know (P)-Power, measured in watts. You know your (R)-Resistance, measured in ohms. Hopefully you know the (E)-Voltage measured in VOLTS:) of the system. (E x E) / R = P <---after those maths(<---) There will be a efficiency associated to amp type, it will take more maths(<---) to get a estimate of the actual rating you're looking for. I believe its called (pf).

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