We installed a pair of NHT rear surround speakers in our front room. Unfortunately, my stud finder missed a 2x4 sheetrock nailer behind the left speaker (because there was an air gap) so the left speaker was a challenge. But, after a lot of drilling, chizzeling, cutting, prying, pocking a hole through the back side of the wall, and some sheetrock repair, all is now quite well. I'm sorry I didn't get pictures of the mess I made.