Wrong wrong wrong wrong one of the most wrong car audio myths in existence. Turning the volume down would blow a speaker then. And you, like most, may try the "Well, if he doesn't have enough power, he might unknowingly run his amp in clipping, and clipping destroys speakers" argument. But you see, the thing is, clipped signals are actually less bad for the speaker than had the signal not been clipped. You lose a SMALL amount of cooling for milliseconds at a time compared to the average power going up if the amp hadn't run out of voltage or power.
You can blow a speaker in clipping. It's not any easier than blowing a speaker without clipping. I'd say it's actually harder, because with clipping, it will start to sound worse as the distortion gets worse. Without clipping, it will probably sound clean until it's too late (though the "hot voice coil epoxy" smell they give off is a sign to turn it down right now)
The ONLY downside of using an amp that is not powerful enough is that it won't go loud enough (within a reasonable distortion level, anyway). Period.
I DO run aftermarket amps and I do recommend them for people who want good and loud sound. Just clearing up a misconception here.
listen i dont want to get into a pissing match with you. i'm not caraudio expert. i've built a few systems that work great though so i'm no n00b.
and i dont think we should take what crutchfield says as gospel, and i haven't bought anything from them in a while because their prices aren't competitive, but I would hope that their experts know some stuff about car audio.
Q: My new component speakers aren't living up to my expectations. What's wrong?
A: Here are a few tips to get your component speakers sounding their best:
Check the crossover setting — many think that a flat setting for the tweeters is the way to go, but you'll often find that you need to attenuate the highs to counteract too much brightness
Are you feeding them enough power? Running most sets of components off your head unit is just not going to give them enough power to operate properly. Remember, underpowering your speakers is more dangerous than overpowering them.
Q: How much power do I need for my new speakers?
A: While manufacturers give a range of RMS, or continuous, power that will work for the speaker, getting towards the upper end of that power range or even exceeding it yields the best results. That said, a speaker with a lower RMS power range will be more suitable for powering with a factory or aftermarket stereo, while a higher RMS range will work better with an external amplifier.
When using an external amplifier, you should pick an amp whose power rating is in the upper end of your speaker's power range. For example, if a speaker is rated to handle up to 35 watts of RMS power, it will perform closer to optimum as your power source approaches delivery of 35 watts. It's better to overpower a speaker than to underpower it
— the distortion caused when you push a low-powered amp or receiver to its limit is much more likely to harm a speaker than too much power.