Enjoy the crisp and clear sound of your MP3/WMA/AAC1 files with CD or control yourdigital music using the USB 1-wire on your Sony® CDX-GT56UIW. You can also finetune your listening experience with the Advanced Sound Engine processor.SpecificationsCDX-GT56UIW CDX-GT56UIW CD Receiver with USB inputBullets• Detach face with LCD display and front aux input• Front USB input for iPod® 2, iPhone® & USB music players• MP3/WMA/AAC1 playback with DM+ enhancement technology• Intuitive Quick-BrowZer® and ZAPPIN™ search features• Advanced Sound Engine and 52 Watts x 4 High Power• 2 Volt rear/sub selectable preamp outputs• Automatic Level Optimizer• Wireless card remote included (RM-X211)• Radio Data System (RDS)• Red key illuminationAmplifier SectionMax power output 52 watts x 4 at 4 ohmsPower Ad Hoc CEA2006 Standard Power: 17 Watts RMS per channel into 4 Ohms, 4 channels driven from 20 Hz to 20kHz with less than 1% THD+N.Speaker Impedance 4-8 OhmsAMP & General FeatureAutomatic Level Optimizer YesAux-In Yes (Front)DM+ (Codec enhancer) Yes(Gen2.1)EQ EQ7: 7 band EQ with +/- 6 dB adjustment at 63 Hz, 160 Hz, 400 Hz, 1000 Hz, 2.5 kHz, 6.3 kHz and 16kHz.High Pass Filter Selectable on/off at: 50, 60, 80, 100 or 120 Hz.Loudness Dynamic LoudnessLow Pass Filter Selectable on/off at: 50, 60, 80, 100 or 120 Hz.Output Power (4ohm, 1kHz,16V)(W) 52 watts x 4Pre Out (1) Rear / Sub switchableRear/Sub initial SubRear Bass Enhancer YesTime Alignment Custom Yes (Adjustment)Time Alignment Preset YesUSB Yes (Front)AudioBand AM / FM