928 flush-mount speaker with 150 watts RMS power, the posh 928 flush-mount speaker is the top of the line. This high-performance ceiling speaker uses the exclusive posh SP -9 8" coaxial driver with a cast basket, fiberglass cone, butyl rubber surround, heavy duty magnet and a one-inch neodymium soft-dome tweeter. Used with the patented posh acoustic chamber and baffle, this combination offers high power handling, extended bass and incredibly smooth off-axis response. The 928 is the ideal speaker for those installations where only the best will do—but priced to be competitive with many speakers far below its sonic performance. This complete system is available fully assembled or as a rough-in kit, and is designed to fit either 16" or 24" on-center installations. Its 7.25" depth makes it ideal for 2" x 8" construction. It also has an optional 70/100 volt extended-bandwidth transformer.