The Concept 500 adopts advanced, innovative technologies to deliver pure audio excellence and a sensational sound stage. Our floorstanding speakers couple low directivity with wide bandwidth, good sensitivity and sensible impedance, which makes them room-friendly and allows amplifiers to deliver their best performance. The Concept 500 pairs point-to-point (P2Pâ"¢) bracing to deal with low-frequency panel vibrations with Helmholtz Pressure Equalizers (HPEâ"¢) to balance out pressure irregularities. Another component that allows for less vibration and coloration is the cabinet construction. Three separate layers are filled with a non-setting gel, which damps the the cabinet walls and converts higher frequency vibrations into heat.