Audio Section; Usb Interface - Kenwood KDC-208U Service Manual

KDC-208U/248U/4051UGM/4051URM/MP148U/MP248U
KDC-U3049/U349A/U349G/U349R/U349S/U4049
MW tuner section (KDC-4051UGM/4051URM)
Frequency range (9kHz space) .................. 531kHz~1611kHz
Usable sensitivity (S/N=20dB) ....................................... 36μV
LW tuner section (KDC-4051UGM/4051URM)
Frequency range ......................................... 153kHz~279kHz
Usable sensitivity (S/N=20dB) ....................................... 57μV
CD player section
Laser diode .................................................................GaAlAs
Digital fi lter (D/A) ............................... 8 Times Over Sampling
D/A converter ................................................................ 24Bit
Spindle speed ..........................................500~200rpm (CLV)
Wow & Flutter ..................................Below Measurable Limit
Frequency response (±1dB) ..............................20Hz~20kHz
Total harmonic distortion (1kHz) ..................................0.01%
Signal to Noise ratio (1kHz) .........................................105dB
Dynamic range ..............................................................90dB
MP3 decode ......... Compliant with MPEG-1/2 Audio Layer-3
WMA decode ............ Compliant with Windows Media Audio
KDC-4051UGM/4051URM
AAC decode .......................................AAC-LC ".m4a" fi les

USB interface

USB standard .................................. USB1.1/2.0 (Full speed)
Maximum supply current ............................................ 500mA
File system ............................................................. FAT16/32
MP3 decode ......... Compliant with MPEG-1/2 Audio Layer-3
WMA decode ............ Compliant with Windows Media Audio
KDC-4051UGM/4051URM
AAC decode .......................................AAC-LC ".m4a" fi les
DANGER:
Please do not look at the laser beam directly during
re pair or operation check.
SPECIFICATIONS

Audio section

Maximum output power ........................................... 50W x 4
KDC-U3049/U349A/U349G/U349R/U349S/U4049
Full bandwidth power (at less than 1% THD) ...... 22W x 4
KDC-4051UGM/4051URM
Output power (DIN 45324, +B=14.4V) ................. 30W x 4
Speaker impedance ......................................................4~8Ω
Tone action
Bass ............................................................... 100Hz±8dB
Middle ...............................................................1kHz±8dB
Treble ..............................................................10kHz±8dB
Preout level/load (CD) ..................................... 2000mV/10kΩ
Preout impedance ......................................................≤600Ω
Auxiliary input section
Frequency response (±3dB) ..............................20Hz~20kHz
Input maximum voltage ............................................ 1200mV
Input impedance ...........................................................10kΩ
General
Operating voltage (11~16V allowable) .......................... 14.4V
Maximum current consumption ...................................... 10A
Installation size (W x H x D) .....................182 x 53 x 158 mm
Weight ...........................................................................1.3kg
KENWOOD follows a policy of continuous advancements
in development. For this reason specifi cations may be
changed without notice.