This photo shows one of the rear surround speakers in the 7.1 audio system. This wall is the same rear wall shown in one of the previous photos. We used JBL speakers throughout the entire audio system. These speakers were precisely tuned so that as effects traveled through the speakers, there would be no noticeable change in sound quality or tone. In other words, as the jet flew by, it sounded the same from the front to the back. This is very important in your theater experience and is not to be overlooked.