(amp output) RMS power vs. dynamic power - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > Electrical, Audio, GPS, & 2-Way Radio > (amp output) RMS power vs. dynamic power

Clayton Off Road WJ Long Arm Kits!Clayton Off Road - JK Prototype Gas Tank SkidTJ 5.25" Speaker Adapters - NalinMFG

Reply
Unread 07-18-2005, 04:25 PM   #1
orangez
Registered User
2003 TJ Wrangler 
 
Join Date: Sep 2004
Location: Mobile, AL
Posts: 798
(amp output) RMS power vs. dynamic power

if an amp says

RMS power @ 12.5
140 x 2 into a 4 ohm load

and....

Dynamic power @ 14.4
200 x 2 into a 4 ohm load

how do you know what you are getting?

__________________
ROLL TIDE!!! LSU SUCKS!!!

Quote:
Originally Posted by boonethelunkerl View Post
now all i need to do is learn how to work on my own stuff, that is prolly 5-10 years down the road though
orangez is offline   Reply With Quote
Unread 07-18-2005, 04:52 PM   #2
kappaknight
Registered User
2013 JK Wrangler 
 
Join Date: Jun 2005
Location: Atlanta, GA
Posts: 260
You are getting this when your car is turned off and you are running the system off of the battery's 12.5V

RMS power @ 12.5
140 x 2 into a 4 ohm load

and.... you are getting this when your car is turned on with the alternator charging your batteries at 14.4V

Dynamic power @ 14.4
200 x 2 into a 4 ohm load

HTH. This is a sub amp I assume?
__________________
2013 Commando Green JKUR
/_|o[____]o
[1---L-OllllllO-
()_)()_)==)_)
kappaknight is offline   Reply With Quote
Unread 07-18-2005, 06:13 PM   #3
Jerry Bransford
Do it right or not at all
 
Jerry Bransford's Avatar
2004 TJ Wrangler 
 
Join Date: Jan 2003
Location: Escondido, California, California
Posts: 60,338
RMS and Dynamic have nothing to do with how it is being powered. RMS is the amount of power it can put out continually under a certain threshold limit of distortion.

Dynamic power is kind of like Peak power that it can put out for brief loud passages or things like bass notes or the temporarily loud peak dynamics of a band or singer. It's kind of like running a sprint vs. running a marathon... amps can put out more peak dynamic power for musical peaks than they can sustained RMS power.

RMS and Peak is also how power from a signal is measured... RMS is a more conservative measurement, peak and peak-to-peak are measured using more of the waveform.

Like "Music Power" and "Peak Power" are both kind of misleading terms used by some equipment manufacturers or retailers to boost an amplifier's wattage ratings as much as possible to make the amplifier seem more powerful than it really is. Using the RMS power to compare between amplifiers is really the only way to compare power on an apples-to-apples basis.
__________________
Getting Savvy...

Coolest offroad magazine ever! CRAWL Magazine

When you have a choice, buy American.

Jerry Bransford is online now   Reply With Quote
Unread 07-18-2005, 06:21 PM   #4
kappaknight
Registered User
2013 JK Wrangler 
 
Join Date: Jun 2005
Location: Atlanta, GA
Posts: 260
Oops, read that wrong... I thought both said RMS
__________________
2013 Commando Green JKUR
/_|o[____]o
[1---L-OllllllO-
()_)()_)==)_)
kappaknight is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.