is this a good idea ??

i dont know how to make a link but this is on you tube a guy refoamed his m90 speakers and they viberate on a masive level . this has to be bad for the unit and if not where do i get this done ! lol

http://youtu.be/uwijAifO7mY or refoamed speakers on youtube jvc m90

The stock M90 speakers are not foam surround type,they are the paper accordian surround type.

So you would need to replace the surrounds.....