RMS and Peack handling compasity?

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RMS and Peack handling compasity?

Postby GlenW » Tue Nov 03, 2009 2:21 am

ok what are they I wont to know it I have a sub that has 600RMS and 1200 peack handling compasity. what is the biggest amp I can put on my sub 600 or 1200 watts
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Postby BryanTbone » Tue Nov 03, 2009 2:21 am

Just to reinforce mdc',s answer.



The term peak is only defined electrically. it's 70.7 of the rms value of a sine wave',s current.



However as it applies to a car audio amplifier the businesses that DO define it all define it differently, and anything below the mid level businesses don',t define it at all. it's simply a big ol', number the marketing departments decide apparently at random in an try to impress the uninformed buyer. it's of NO value when looking at an amp',s specifications whatsoever.

On top of that, most of the cheaper businesses lie about their RMS power potential anyway. Some of them are just a joke.

Look at the Legacy LA1099.

It is advertised "4400 Watt four Channel Bridgeable MOSFET".

In the manual for "max output" it lists 1100w x 4.

It DOES list some reasonable RMS ratings of 75w x four at four ohms, 85w x four at two ohms. Now exactly how does 340w rms relate to 4400w??

BTW it has a 30A fuse which could point to 300400w total output.



The La1099 is about a $150 amp online.



Compare that to something like the Jensen Power 760. 75w x four at four ohms, 100w x four at two ohms, and two 20A fuses. $75 shipped from sonicelectronix which is the better buy?



I think some optimistic power ratings on the budget amp is good, and nearly projected, but slapping some random max power number on there that's an order of magnitude greater than what the amp can really produce is just taking benefit of people and should be illegal IMO, but that could make someone have to enforce it, so it',s not going to happen.
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Postby AlonsoF » Tue Nov 03, 2009 2:21 am

600 watts RMS max for the amp attempt to get one that's CEA rated this will guarantee the real specifications on the amp rather then one that's something like 1000 watts peak amp which can have power as low as 200 watts rms



Peak does mean something but isn',t almost as important as RMS



If they',re quality subs based on the size of the box you may be able to typically put a bigger amp on by a bit I had an old skool sony xplod that was 900 watts peek no rms ranking that I had hooked up to a 325 rms amp which has a "peek" on the birth certification sheet of about 1000 or so.
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Postby Fast Chica » Tue Nov 03, 2009 2:21 am

Peak or max power ratings mean nothing. they're only used for marketing.



RMS power values are what you could use for setting up your system. You could decide an amp around the RMS ranking of the sub s you're using. if you have a sub that's 600w RMS then you could want an amp that's around 600w RMS at the corresponding blockage.



Good Luck.
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