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scaseySep 8, 2025
What does “COPY PRO” mean on Kenwood KDC-4551UB?
- BBenjamin HawkinsSep 8, 2025
If your Kenwood Car Receiver displays “COPY PRO”, it means you are trying to play a copy-protected file.
What does “COPY PRO” mean on Kenwood KDC-4551UB?
If your Kenwood Car Receiver displays “COPY PRO”, it means you are trying to play a copy-protected file.
How to improve radio reception on Kenwood Car Receiver?
To improve poor radio reception or static noise on your Kenwood Car Receiver, make sure the antenna is firmly connected and fully extended.
How to fix Kenwood Car Receiver when no sound is coming out?
If you're experiencing no sound from your Kenwood Car Receiver, first, adjust the volume to a suitable level. If that doesn't work, check all cords and connections to ensure they are properly connected.
What to do if Kenwood KDC-4551UB Car Receiver shows “USB ERROR”?
If your Kenwood Car Receiver displays “USB ERROR”, remove the USB device, turn the unit off, and then turn it back on. If the error persists, try connecting a different USB device.
What does “NO DEVICE” mean on Kenwood KDC-4551UB Car Receiver?
If your Kenwood Car Receiver displays “NO DEVICE”, connect a USB device, and then switch the source back to USB.
Why are the song counts different between my iPod and Kenwood Car Receiver?
The number of songs in the “SONGS” category on your Kenwood Car Receiver differs from that on your iPod because the unit does not support podcast files, which are not counted.
Why does my Kenwood KDC-4551UB keep flashing “READING”?
If your Kenwood Car Receiver displays “READING” continuously, it indicates that a longer readout time is required. Avoid using too many hierarchies and folders to improve the reading speed.
Why is the elapsed playing time incorrect on my Kenwood KDC-4551UB Car Receiver?
The elapsed playing time on your Kenwood Car Receiver may be incorrect due to how the tracks were initially recorded.
What to do if Kenwood KDC-4551UB is flashing “IN”?
If your Kenwood Car Receiver displays “IN” flashing, reinsert the disc properly. If the issue persists, it may require professional attention.
What to do if Kenwood Car Receiver shows “ERROR 99”?
If the Kenwood Car Receiver displays “ERROR 99”, press the reset button on the unit. If the error persists, it may require professional attention.
Configuration of initial operating parameters and preferences.
Detailed explanation of each button's operation and function.
How to play CDs and connect USB storage devices.
Connecting an iPod and using the Direct Music Search function.
Adjusting audio parameters like subwoofer level and bass boost.
Fine-tuning mid, treble, balance, fader, and subwoofer settings.
Explanation of buttons and operations using the remote controller.
Wiring instructions for various Kenwood KDC models.
Specific wiring diagram for KDC-4051URY and KDC-4451UQ models.
Detailed technical specifications for FM/MW/LW tuners and the CD player.
Technical data for USB interface, audio output, and auxiliary inputs.
FM Tuner Section| FM frequency range FM1/FM2 (50 kHz space) | 87.5 MHz — 108.0 MHz |
|---|---|
| FM frequency range FM3 (30 kHz space) | 65.00 MHz — 74.00 MHz |
| Usable sensitivity (S/N= 26 dB) | 1.0 μV/75 Ω |
| Quieting sensitivity (DIN S/N = 46 dB) | 2.5 μV/75 Ω |
| Frequency response (±3 dB) | 30 Hz — 15 kHz |
| Signal-to-Noise ratio (MONO) | 63 dB |
| Stereo separation (1 kHz) | 40 dB |
MW Tuner Section| MW frequency range (9 kHz space) | 531 kHz — 1 611 kHz |
|---|---|
| MW usable sensitivity (S/N= 20 dB) | 36 μV |
LW Tuner Section| LW frequency range | 153 kHz — 279 kHz |
|---|---|
| LW usable sensitivity (S/N = 20 dB) | 57 μV |
CD Player Section| Laser diode | GaAIAs |
|---|---|
| Digital filter (D/A) | 8 Times Over Sampling |
| D/A converter | 24 Bit |
| Spindle speed | 500 rpm — 200 rpm (CLV) |
| Frequency response (±1 dB) | 20 Hz — 20 kHz |
| Total harmonic distortion (1 kHz) | 0.01 % |
| Signal-to-Noise ratio (1 kHz) | 105 dB |
| Dynamic range | 90 dB |
USB Interface| USB standard | USB1.1/ 2.0 (Full speed) |
|---|---|
| Maximum supply current | 500 mA |
| File system | FAT16/ 32 |
Audio Section| Maximum output power | 50 W × 4 |
|---|---|
| Output power (DIN 45324, +B = 14.4 V) | 30 W × 4 |
| Speaker impedance | 4 Ω — 8 Ω |
| Tone action (Bass) | 100 Hz ±8 dB |
| Tone action (Middle) | 1 kHz ±8 dB |
| Tone action (Treble) | 10 kHz ±8 dB |
Auxiliary Input Section| Auxiliary frequency response (±3 dB) | 20 Hz — 20 kHz |
|---|---|
| Input maximum voltage | 1 200 mV |
| Input impedance | 10 kΩ |
General| Operating voltage | 14.4 V |
|---|---|
| Maximum current consumption | 10 A |
| Installation size (W × H × D) | 182 mm × 53 mm × 158 mm |
| Weight | 1.3 kg |
Audio Section| Preout level / load (CD) | 2 000 mV/10 kΩ |
|---|---|
| Preout impedance | ≤ 600 Ω |
