[Dave]

Will try cleaning it out with low pressure air and see if that helps.
Anybody ever clean one of these?

One of the best ways to clean a speaker is to GENTLY brush the dust from the cone, lay the speaker face down and let it play at moderate volume overnight. The movement of the speaker will vibrate the years of dust & dirt right on out of there. I don't recommend the compressed air method, even at low pressure you can blow a hole through the fragile paper.
Dave