Distortion Problem

[officer dave]

I have 2 MM 521 and 2 MM 651 speakers in my motorcycle fairing running off of a JVC KD R 620 head deck. I have a large amount of distortion happening even at mid volume. Could this be caused by vibration from the plastic fairing and the fact that I do not have an amp and the speakers are not getting enough power? would putting Dynamat inside of the fairing help? I have heard so many people rave about the Polk MM series speakers saying they do not distort. Please help. Thanks Dave

[Jstas]

Can you describe the distortion?

Does it sound like buzzing or rattling or does it sound like, I dunno, a "farting" noise?

If it's buzzing or rattling, it's likely the faring and some Dynamat or other sound deadener would do you good.

Also, if you have tone controls (bass/treble) jacked all the way up, you may be over driving the amp in the head unit. Back them off a bit and see how it fares then.

But I thought you installed an amp in there? What happened to that?