In addition to crisp, detailed mid and high frequencies, this single in-ceiling speaker kicks out impressive bass due in part to the 8” carbon fiber composite woofer and heavy-duty and efficient magnet structure that focuses energy within the voice coil gap. Other Audiophile features designed into the ACE870 include front-mounted contour switch as well as butyl rubber surround that gives the speaker more excursion capability for deeper bass and wider frequency response. The ACE870 installs easily into ceilings with four easy-to-lock-in dog-eared brackets and includes a cut-out mounting template.