re: Marine stereo/speaker question

I can't think of a stereo that will actually put out 40w per channel. The best will do like 30. Even the newer ones rated at 50 won't do 40.

That being said, if you put 200w to 99.99999% of coax speakers rated for 200w, you'll blow them up. Manufacturers way over rate them, because they know people relate higher wattage ratings to better speakers. I have much higher quality speakers in my truck that are correctly rated at 90 rms and 150 peak, and I have about 80 going to them consistently. They distort if I turn it up anymore.

Moral of the story is that you'll be perfectly fine, and those speakers are matched well to that radio