Please explain to my friend...

[crfracer290 10+ year member]

Please explain this for my friend...I can't get him to listen to me.

Why does a subwoofer, Kicker compvr for example, say it is a 600 watt sub but you should only put in the rated RMS (300w). What is the difference between the max output power and the RMS rated power.Why do some amps say they are 1000w but will only put out 800w RMS.

I cannot explain this things well to him and he does not want to listen to me so please give some simple answers so I can show him this thread...

thanks.

Click to read more...

 

[Kold_Killa 10+ year member]

Companies do that for Marketing reasons... They know that stupid people would rather buy an amp that they think is 1000watts, when it could simply be 500rms (the only true number to go by). As for woofers, it is kind of the same thing. Most of the time you can exceed the RMS rating of a subwoofer, but the R in RMS stands for recommended, so there you go. The peak power of a sub is pretty much a BS number anywayz. I don't exactly know what you are trying to explain to your friend, but I would keep it simple and tell him to go with the RMS for products. But like I said, you can normally exceed a RMS rating on a quality woofer by quite a bit with a clean, unclipped signal.

 

[rtillaree 10+ year member]

haha those **** "friends"

 

[Famous_78]

Ive got these kinds of "friends" all around here dude they will argue with anything. The best thing to do it let them think and say what they want but laugh when they come and say man my amp blew or my sub blew.

 

[LinxuS 10+ year member]

Doesnt RMS = root means square, not recommended? lol

Or is that only physics :X

 

[m4i2k2e2 10+ year member]

ok, as stated before yes, you can exceed the RMS limit on a sub. amps such as sony are 1200 watt peak but are only 375 i believe RMS. also another eason they could say 1000wrms could be the fact that for instance 1000wrms @ 1 ohm and, 800wrms @ 2 ohms. remember that whatever ohm load you have effects the amp output as well.

 

[Kold_Killa 10+ year member]

remember that whatever ohm load you have effects the amp output as well.

not true on JL amps //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[phantom240 5,000+ posts]

Companies do that for Marketing reasons... They know that stupid people would rather buy an amp that they think is 1000watts, when it could simply be 500rms (the only true number to go by). As for woofers, it is kind of the same thing. Most of the time you can exceed the RMS rating of a subwoofer, but the R in RMS stands for recommended, so there you go. The peak power of a sub is pretty much a BS number anywayz. I don't exactly know what you are trying to explain to your friend, but I would keep it simple and tell him to go with the RMS for products. But like I said, you can normally exceed a RMS rating on a quality woofer by quite a bit with a clean, unclipped signal.

RMS doesnt have anything to do with "recommended" you retarded imp.

It stands for Root Mean Squared. Its a mathematical term that in simplified form, measures constant wattage. I dont understand myself 100% how it is calculated, but my dad is pretty good with that.

I think ima sig that one too!

 

[johnson 10+ year member]

but the R in RMS stands for recommended, so there you go.

//content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif

http://www.bcae1.com/voltages.htm

 

[Earthman 10+ year member]

Doesnt RMS = root means square, not recommended?

Absolutely,you're correct

 

[jake760 10+ year member]

my favorite

friend:how many watts is your amp

me: 1200rms

friend: oh man, my system is going to stomp yours, I'm getting a 1600watt pyramid!

me: okay:eyebrow:

 

[Rich B 5,000+ posts]

Think of it as reccomended RMS is the power it can safely take all day long (in the right enclosure), and "RMS Max" is the max short term power it can take in millisecond bursts when the bass kicks for a moment.

If he cant understand that, you need smarter friends!

//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[armstrong 10+ year member]

there are so many dumb people out there its not even funny. i'm no expert, but i know some basics and what brands are good and which to avoid. i've heard some REAL funny things from this kid i work with. he has two bazooka 10s and two OLD cadence subs and he says he's gonna be heard from a mile away lol. he also said you're not supposed to use an amplifier for component speakers. he also said eclipse subs are "unblowable"... this kid is so dumb it's not even funny. i dont even try to tell him he's wrong. i let him believe what he wants.

 

[req 5,000+ posts]

jesus christ.

RMS simply is the amount of constant voltage output of the amp, since the amp only reaches the peak of the wavecycle for a fraction of a second, it is considered 'max' power, and usually wont even be seen because people play MUSIC, wich is not a constant waveform.

the root mean square is a rule that gives an 'average' voltage\wattage\energy measurement for your amp. wich is basically 70% of the maximum unclipped waveform.

also remember, that *THERE ARE MANY* manufacturers that are LESS THAN TRUTHFUL of peak wattage, or rms wattage. they simply lie out their teeth. ESPICALLY when they talk about the little chip amplifiers in headunits.

there simply is not a headunit that puts out 50w x4 channels of clean power at 4 ohms. unless it uses an external brain. well. maybe there are ONE OR TWO. but thats a longshot still.

remember, MARKETING will get people to buy shitty products. its all about what the consumer can be made to believe.