RMS

 

Bronze Member
Username: 94celica

Hanover, Pa United States

Post Number: 14
Registered: Sep-05
what does RMS mean?
 

Gold Member
Username: Basshead86

Ocala, FL USA

Post Number: 1880
Registered: Aug-05
Root Mean Squared.
it is .707 of peak or max ratings
most companies use that term to describe continouos ratings.
 

Gold Member
Username: Basshead86

Ocala, FL USA

Post Number: 1881
Registered: Aug-05
*continuous*
 

Silver Member
Username: Rhassler

Gilford, NH

Post Number: 391
Registered: Dec-04
Im not sure if your looking for the techincal meaning of RMS or the genereal use term or whatever lol. But on an amp, it means the "true" amount of watts given constantly. Don't go by max on sumthin, go by the rms!(sub, amp, cd player...) on a sub, it means the amount of watts needed constantly. You wanna match up a subs rms with the amps rms (or have them close) and on a cd player, its the "true" amount of watts given out constantly.
 

Bronze Member
Username: 94celica

Hanover, Pa United States

Post Number: 15
Registered: Sep-05
is it basically half of the peak power?


 

Gold Member
Username: Basshead86

Ocala, FL USA

Post Number: 1886
Registered: Aug-05
no, i just told you.
the defintion of RMS is .707 time that of the peak rating.

many audio companies just use the term "RMS" to desrcibe the "continuous" rating in which their equipment is rated at.
most of the time, the continuous rating is about 50% of the max rating.:-)
 

Bronze Member
Username: Killerzracing71

Fredericksbutg, Virginia United states

Post Number: 80
Registered: Aug-05
94 CELICA "is it basically half of the peak power? "

Muddy "no, i just told you,the continuous rating is about 50% of the max rating"

what the world are you talking about i hear the .707 junk but why did you say the last part

is rms a real representation of the power the device trually makes and continous just a marketing gimmik
 

Gold Member
Username: Basshead86

Ocala, FL USA

Post Number: 1956
Registered: Aug-05
listen by definition RMS is .707 times that of the peak, BUT audiocomapanies use the term RMS to describe their continuous ratings.

if they truly used RMS as it was meant to be used, then thier nubers would be higher.the rule of thumb is whatever your PEAK ratings are, then about half of that is your Continuous rating(what the audiocompanies LIKE to call the RMS rating).

get it?
 

Gold Member
Username: Basshead86

Ocala, FL USA

Post Number: 1957
Registered: Aug-05
soooooo, if you have a peak rating of 500w.

then your RMS rating is 353.5w

and your continuous is around 250w.

but audio use the term RMS to describe continuous rating on their subs and amps.:-)
 

Gold Member
Username: Basshead86

Ocala, FL USA

Post Number: 1958
Registered: Aug-05
kinda like how the "gain" on an amplifier isn't really a "gain", b/c it isn't boosting voltage, rather it is an input sensitivity that matches your HU line voltage to that of the amp.:-)
 

Gold Member
Username: Rovin

Trinidad & T...

Post Number: 1033
Registered: Jul-05
Well if its 1 of those top o the line very expensive brands - then the usually its 1/2 theory 'may' apply .

But when it comes to the very cheaper brands its more like 1/5 or less of the MAX WATTS ratings especially when it comes to speakers/subs - they print in 1 1/2 " size letters 1000 WATTS MAX ! , when u look @ the 1/4" print it'll say 200wrms (thats if u are lucky -lol)

I've seen 400w max then in tiny print 80wrms
700w max then 80wrms & many other bold lies ......
 

New member
Username: B101

Queen City, NC USA

Post Number: 7
Registered: Sep-05
Muddy is right.
The defintion of RMS is .707 of the sine wave.
Thats how I learned it.
 

Platinum Member
Username: Glasswolf

Wisteria, Lane USA

Post Number: 10661
Registered: Dec-03
as noted, RMS by definition is the root mean square or .707 * peak measure of the sine wave, but in regards to audio amplifiers, generally the term RMS simply means "peak continuous" power output. The way to go with measuring output of an amplifier is to use the CEA measure for RMS or continuous output.
That measure will be accurate.
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