i have my sub next to the sliding glass door in the family room. this is mainly due to space restrictions. however because the low frequencies are non directional it doesn't really matter... if you do put the sub next to glass, the glass will diffract the sound waves. kind of like a sub in the back of a hatchback, the back class just spreads the sound waves. you can do the "subwoofer crawl" to find the optimum spot, but sometimes, that just isn't realistic.
i think you should ask your wife about the grill covers, and not us... :p
