The ES55 envelops your space with high resolution cinematic sound thanks to its Hi Res Audio certified Terylene dome tweeter and dual 6.5" Dynamic Balance polypropylene woofers. Polk’s patented Power Port® design delivers deeper more natural bass by reducing airflow turbulence and distortion. A rigorously braced low resonance cabinet ensures purity of sound by minimizing internal coloration. Built for compatibility and clarity it supports 4 or 8 ohm systems bi wiring or bi amping and excels across music gaming and home theater applications.