Front speakers produce audio and effects sounds. Different types of front speakers include floor speakers, bookshelf speakers, and satellite speakers. Surround sound speakers provide a 360-degree sound experience and are often installed in ceilings or walls. In addition to high quality speakers, proper placement of speakers and use of high quality cables and acoustic treatments can improve audio performance. Positioning speakers and subwoofers strategically within a listening space based on mirror tests and bass quality tests can further optimize the audio output.