528 flush-mount speaker with 100 watts RMS power. The posh 528 is one of the finest ceiling speakers available anywhere. Combining the exclusive posh SP -5 8" coaxial driver with posh’s patented injection-molded enclosure, the 528 offers superior frequency response and exceptional off-axis dispersion. This acoustic suspension design is ideal for both high-end home systems and commercial and business systems that require true high-fidelity sound with superior bass response. The 528 system is available with a 70/100 volt extended-bandwidth transformer and is designed for either 16-inch or 24-inch on-center installations. The 528 is available either unassembled or fully assembled. The sleek grille is completely paintable and is available in either round or square design and can be changed out even after the job is completed. The patented trapezoidal acoustic chamber has no parallel internal surfaces, eliminating unwanted phase cancellation, enhancing the deep full bass. The high-performance 528 driver delivers a flat response up to 45 degrees off-axis.