Good Morning everyone. Its time for school again (and yes, I am the student). I was not sure if I should post this in the technical help forum or the DIY forum, so moderators, feel free to put me in my place (or so to speak...).
I am interested in building/rebuilding a speaker for a center channel. Yes I am aware of all of the sonic and timbre issues, but my questions surround (no pun intended) the shielding needed to set close to the TV. So my questions are;

1) What material is used for the shielding
2) Is it a specific material or is the actual drivers different
3) If the drivers are not different, can it be added to an existing speaker
4) If not, what do I use in the construction of a new cabinet.

Thank you in advance, and as always, your responses are appreciated.

Eyedoc