Just bought a 2000 Jeep XJ and found out the driver side front speaker is blown :/ I know for Subwhoofers you need to be in the right range of RMS for them to work correctly; too high and they will blow, and too low they wont get the power they need. Is it the same for smaller speakers (6.5inch)?

I am asking because i have the stock headunit and just want to replace the speaker (or fron speakers if they come in a set) and i cant find the RMS rating of the factory headunit or the speakers

I am thinking if just buying these speakers just or have something there: http://www.bestbuy.com/site/JVC+-+6-...&skuId=2414377
Would a RMS rating of 40W be too much for the headunit?

 

Those will work just fine. They've got a fairly high maximum (230w, I think) but I doubt that your factory head unit is pumping out huge power. Even the Infinity systems aren't super high powered. Obviously, the JVCs aren't the greatest speakers but they're probably as good or better than stock.

 

Quick fyi. Its common for the drivers door speaker to short out from the wires through the door rubbing. I'd make sure the speaker is actually blown before buying a new one. In my case I bought a set of speakers and it still didnt work, after researching I figured that out and fixed it.

 

RMS stands for Root of the Mean Squared, it's just a method of determining average power.
The RMS rating of a speaker is the maximum average power it can handle without damage. Too high a (speaker) rating is never a problem. Too low is.

Impedance is another consideration. Automotive speakers are normally 2, 4, 8 or 16 ohms. (with exceptions... some Bose systems are 1 ohm. Ugh. Try finding that aftermarket)
This is the load the speaker presents to the amplifier. Try to match the new with the old, a lower value than the amplifier expects can pull excessive current and destroy the amp. OEM is commonly 4, occasionally 8.

Efficiency is yet another factor. It'll typically be rated in terms of dB/watt/distance. That means it will create XX dB of volume at a certain distance with a certain power applied.
Higher numbers are louder for the same amplifier power, and Decibels are logarithmic....3 dB is twice as much, thus a speaker rated at 88dB@ 1 foot/1 watt is twice as loud as one rated at 85dB for the same input power.

That said, the speakers you picked out should work just fine provided they fit the cutouts.

 

OKay, since too high of a speaker RMS is not a problem, i could just get some nice ones without the risk of them sounding like **** or being damaged? Im going too upgrade the sound system eventually, but i wanted to get a cheap speaker just so i can hear my system. If i can just get a pair of nice speakers and not have them them be damaged ill go that route

 

I upgraded to Polk Audio 5.25's up front and Rockford Fosgate 6X9's in back. Love the setup.

 

with stock stereo?

 

No, but I really don't think that matters. I have friends that have upgraded speakers in their vehicles with no issues, yes, using the stock head unit. The installs I helped with were a 04 Tacoma TRD and a newer Civic. They sounded fine.

 

ok cool, thank you

 

No problem. Buy them sized to handle whatever power level your upgraded system will put out. In the meantime they'll work fine with the lower power stock unit.

 

well, got some new speakers and it wasnt the speaker that was bad because the new ones werent working either... :/ I cant take the dorr panel off because the the middle screw in the arm handle will not come out... this sucks

 

Double check your power and ground going to the speakers. Also rule out stupid stuff like volume and source on your head unit. Still no luck, pull the head unit and start checking wires.

If the screw won't come out you might have to drill it.