It has a Cascade Tapered Crossover array that guarantees a flat miband response and has an improving influence on imaging, focus, and depth. To continue to improve the sound quality, the Polk Audio LSi9 has cast aluminum driver baskets that resist flexing and ringing, intert 1-1/2" side panels, a rear-firing PowerPort venting system to add precision to the bass response, smooth midrange ensured by the Polk Audio patented Acoustic Resonance Control, a mylar bypass capacitor that flattens high frequency responses, and an open architecture low diffraction grill that increases the spaciousness of the imaging.
