English 35SpecificationsFM tuner sectionFrequency range (50 kHz space):87.5 MHz — 108.0 MHzUsable sensitivity (S/N= 26 dB):1 μV/ 75 ΩQuieting sensitivity (DIN S/N = 46 dB):2.5 μV/75 ΩFrequency response (±3 dB): 30 Hz — 15 kHzSignal-to-Noise ratio (MONO): 63 dBStereo separation (1 kHz): 40 dBMW tuner sectionFrequency range (9 kHz space): 531 kHz – 1,611 kHzUsable sensitivity (S/N = 20dB): 36 μVLW tuner sectionFrequency range: 153 kHz – 279 kHzUsable sensitivity (S/N = 20dB): 57 μVCD player sectionLaser diode: GaAIAsDigital filter (D/A): 8 Times Over SamplingD/A converter: 24 BitSpindle speed: 500 rpm — 200 rpm (CLV)Wow & Flutter: Below Measurable LimitFrequency response (±1 dB): 20 Hz — 20 kHzTotal harmonic distortion (1 kHz): 0.01 %Signal-to-Noise ratio (1 kHz): 105 dBDynamic range: 93 dBAAC decode: AAC-LC “.m4a” filesMP3 decode: Compliant with MPEG-1/2 AudioLayer-3WMA decode: Compliant with Windows MediaAudioUSB interfaceUSB standard: USB1.1/ 2.0 (Full speed)Maximum supply current: 500 mAFile system: FAT16/ 32AAC decode: AAC-LC “.m4a” filesMP3 decode: Compliant with MPEG-1/2 AudioLayer-3WMA decode: Compliant with Windows MediaAudioSD card section (KDC-4751SD only)Compatible physical format: Version 2.00Maximum memory capacity: 32 GBFile System: FAT 16/ 32AAC decode: AAC-LC “.m4a” filesMP3 decode: Compliant with MPEG-1/2 AudioLayer-3WMA decode: Compliant with Windows MediaAudioBluetooth section (KDC-BT41U/KDC-BT31U only)Technology: Bluetooth Ver. 2.0 CertifiedFrequency: 2.402 – 2.480 GHzOutput Power: +4 dBm (MAX), 0 dBm (AVE)Power Class 2Maximum Communication range:Line of sight approx. 10m (32.8 ft)Profile:HFP (Hands Free Profile),SPP (Serial Port Profile),HSP (Headset Profile),OPP (Object Push Profile),PBAP (Phonebook Access Profile),SYNC (Synchronization Profile)Audio sectionMaximum output power: 50 W × 4Output power (DIN 45324, +B=14.4V): 30 W × 4Speaker impedance: 4 Ω — 8 ΩTone action:Bass: 100 Hz ±8 dBMiddle: 1 kHz ±8 dBTreble: 12.5 kHz ±8 dBPreout level / load (CD): 2,500 mV/ 10 kΩPreout impedance: ≤ 600 ΩAuxiliary input sectionFrequency response (±3 dB): 20 Hz — 20 kHzInput maximum voltage: 1,200 mVInput impedance: 10 kΩGeneralOperating voltage:KDC-BT41U/ KDC-BT31U: (10.5 V — 16 V allowable):14.4 VKDC-4751SD: (11 V — 16 V allowable): 14.4 VMaximum current consumption: 10 AInstallation size (W × H × D):182 mm × 53 mm × 160 mmWeight: 1.3 kgSubject to change without notice.