Marantz Home CD Player (CD6006) Marantz proprietary HDAM-SA2 circuits technology for high quality sound Double layered bottom plate and rigid feet for extra stability. Cdda Audio : Frequency Response : 2 Hz-20 kHz Full discrete headphone amplifier with HDAM-SA2 and gain control. High-quality sound even from demanding headphones CD, CD-R/RW playback, Front USB input certified Made for iPhone/iPod Versatile playback options including iDevice direct connectivity