Pioneer DEHP500UB Premier CD/MP3 Receiver USB Direct Control for iPod and more Available Bluetooth Wireless Technology Built-in MOSFET 50 W x 4 amplifier for excellent sound quality, minimal distortion and efficient power handling. Supertuner IIID advanced analog and digital processing assure superior imaging, less distortion and noise, and stronger, smoother broadcast signal Two-Way Crossover with separate High and Low Pass settings.