Our woofers are made of aramid fiber and the tweeter domes are silk. Both of these materials are very robust and can handle quite a bit, therefore we decided against grill covers for most of our speakers as they tend to negatively color the sound. The HD6 and HD3 speakers do come with magnetically attachable grills for customers to decide whether or not they would like to use them!
Do Audioengine speakers come with speaker grills?
