I have a jvc kw xz720A car receiver and looking for 6.5 speakers The receiver says 4X40watts what should my speakers be rated at?
Truthfully, it doesn't make a ton of difference. Almost every head unit manufacturer advertises peak power output. They do that because peak power ratings are almost meaningless and they're no real indication of what the unit is actually capable of, but not many shoppers are aware of that. In recent years 50x4 is the standard power claim of the typical head unit, and ALL those head units produce 14-22w rms per channel. With an older JVC it might give you 12-15w rms per channel. The LOWEST rms power ratings you'll find on a decent 6.5 speaker will be in the 40w rms range, so no matter which speaker you choose you will have a lot less than optimal power on hand to run it. So what I'm saying is don't make power handling an important part of your speaker choice, although I would look at the lower end of the spectrum on the assumption a speaker designed to work best at 40 or 50w rms will probably work better at 15w rms than a speaker meant for 80w rms. Go to some stores and listen. If possible, listen with only head unit power running them. It won't do you much good to listen to a bunch of speakers getting 100w from an external amp when they won't be getting nearly that much in your car.
Whatever speakers you get it will say on the box what it's rated at. It will say what is recommended and what could blow the speakers. If it says 40 watts I suggest getting a tad bit more powerful like 60 or up just to make sure it doesn't blow the speakers. I got kenwoods and I forget what it was rated at, but I'm pretty sure its around 75. They sound great! Also don't buy speakers from the store get it from amazon. So much cheaper.
