Class D amplifier: Newly adopted CLASS-D technology realizes low power consumption from power supply but provides 160W maximum power. Bass Reinforcement: It adopts high sound operational Amplifier NJM 4580. It realizes dynamic and tight bass. Power supply choke coil Power: Adapt new choke coil which has little current loss. Years of research and state-of-art production facilities is our secret behind every Pioneer speaker^s sound reproduction. Use our 3-D hologram on the speaker package to identify a product and safe-guard.