by 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.