I got a Sony cd deck (35Wx4) when I got the car. I got 4 new Panasonic speakers, one pair is 150W peak and the other is 240W peak. Yesterday I turned them on pretty lord and the cd player suddenly shut off and can never turn on again, as the cd deck and the 12V power output share the same fuse, I'm pretty sure the fuse works good, as the 12V output works good.

Was that the reason the cd deck (35W) underpowering the speaker and so it surnt out?

 

So you checked the radios fuse? It sounds like you are saying that you checked the radio fuse on the car in the fuse panel. Pull out the head and check it's fuse. There should be one.

 

There are 2 fuses, one under the dash and one under the hood. Check them both. One is radio, and one is dome light or something. If not, check the one behind the stereo inline wire fuse.