Every speaker from the staples of Polk is timbre-matched in every series to produce effortless blending from speaker to speaker to the next in multi-channel systems.Featuring a Dynamic Balance Composite Drive and MDF construction, it packs a punch with built-in 100W high-current amplifier with adjustable crossover, phase switch and automatic on/off circuitry. Add more booming bass to your audio experience with the Polk Audio 10' subwoofer. A crossover is Polk Audio 265 the part of the speaker system, which directs high frequencies to the tweeter and lower range frequencies to the woofer Now you can have it all thanks to Dynamic Balance technology You Specifications - Shape - rectangle. Polk Audio 265RT (Ea) 3-way In-wall Speaker Polk Audio 265.