🔊Polk’s patented Power Port technology, bass done better. Think of it as a series of technologies that improve the efficiency of the port + decrease the amount of noise & distortion it creates. Polk speakers feature different versions of this technology: The original Power Port smooths air turbulence by guiding airflow into the listening space using flares and a diffusor. This promotes a more streamlined, or laminar, flow, which generates less port noise. The original Power Port is found in our Signature Elite Series speakers and HTS subwoofers. The Enhanced Power Port takes things a step further by refining the flares that control airflow, for even less noise and more bass. Enhanced Power Port is found in our Legend Series. Power Port 2.0 starts with the Enhanced Power Port and integrates our latest X-Port technologies for the best of both worlds. X-Port features a set of closed-pipe resonators, called Eigentone filters, that are tuned to absorb unwanted port and cabinet resonance...