Kenwood KDC-BT645U specs

Tuner

FM

FM Frequency Range 87.9MHz - 107.9MHz
FM Frequency Step (200kHz)
FM Usable Sensitivity 11.2dBf
FM Quiet Sensitivity 19.2dBf
FM Frequency Response (±3.0dB) 30Hz-15kHz
FM Signal/Noise 63dB(MONO)
FM Selectivity -
FM Stereo Separation 40dB(1kHz)

AM

AM Frequency Range 530kHz-1700kHz
AM Frequency Step (10kHz)
AM Usable Sensitivity 31dBμ (36μv)

CD

Digital Filter(D/A) 8 Times OverSampling
D/A Converter 24 Bit
Frequency Response 20-20kHz(±1dB)
Total Harmonic Distortion 0.01%(1kHz)
Signal/Noise Ratio (dB) 105dB(1kHz)
Dynamic Range 93dB
MP3 Decode Compliant with MPEG-1/2 Audio Layer-3
WMA Decode Compliant with Windows Media Audio
AAC Decode AAC-LC ".m4a" Files

USB I/F

Compatibility USB 1.1 & 2.0 Full Speed
File System FAT16/32
Maximum Supply Current 500mA
Decode MP3/WMA/AAC
Preout Level(mV)/Load - Unbalanced 2500mV/10kΩ(CD/CD-CH)
Preout Impedance(Ω) Under600Ω
Speaker Impedance(Ω) 4-8Ω

AMP

Maximum Power 50Wx4
Full Bandwidth Power 22Wx4
Bluetooth
Version 2.0 Certified
Maximum Range

Line of sight, approximately 10 Meters (32.8ft)
Profiles
HFP Yes
HSP Yes
SPP Yes
PBAP Yes
OPP Yes
SYNC Yes

General

Operating Voltage

14.4V (11V - 16V allowable)
Maximum Current Consumption 10A

Installation Size

Width 182(mm) 7-3/16(in)
Height 53(mm) 2-1/16(in)
Depth 158(mm) 6-1/4(in)