Question about Kenwood KDC-X590 CD Player

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No Sound I installed a Kenwood KDC-MP438u into my 94 BMW connected all the coresponding wires with the adapter, the unit turns on, it plays the cd's even plays from the usb device, but no sound comes out. So i switched to the stereo's tuner and the radio works, produces sound. So i thought there was a problem with the unit itself so i returned it and got a new one of the same model. Tryed to install again and STILL it doesn't work. Any ideas?

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  • ehtml Oct 03, 2008

    Also the Demo function of the unit is off.



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Same problem as above (installed in a Chrysler Cirrus with original amp and speakers and pre-out not used); I applied solution 1 above prior to seeing this site, and still very weak, tinny sound. With tuner on, it sounds great except for maybe just a slight lack of extra bass. Hopefully new speakers will fix that problem.

I plan to reset, disconnect - connect (car battery) and reset again; and also recheck connections.

Connections must have been Okay, since balance and fader functions are normal. Will reply later.

Posted on Oct 19, 2008

  • tackroc Oct 20, 2008


    I have a suspicion that when the tuner is in use; the radio internal amp is on because the power antenna is in use. However; when switching to USB, AUX or CD, the antenna retracts and removes power from the internal amp. Unforetuneately, the supplied user manual is not very clear.

    Any ideas or suggestions?

  • tackroc Oct 21, 2008

    From tackroc (KDC-MP438U)

    Having seen other comments on other generic installation web sites, I disconnected the blue motor antenna control wire, and hooked my car's antenna to the to the blue power control wire (I am not using an additional amp, just the OEM amp). This causes the antenna to stay up whenever the unit is not in standby but allows the internal amp to remain on. Maybe not the ideal solution, but now I do not need to add on another amp, and it sounds great. Can't wait to finish upgrading my speakers.

    Good luck!


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Go to standby hold m-log button tell menu comes on display press up on volume control tell amplifier comes on display pess left on volume control tell display says amp on. the built in amp on the stereo turns of and on to provide better sound quality to the pre-amp out puts

Posted on Oct 18, 2008


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If your KENWOOD unit is experiencing audio problems (NO Audio), but do have audio when TUNER is selected as the source, you may have problems with your installation.

NOTE: If using an external amplifier or the unit was installed using a separately purchased wiring harness for your specific vehicle, please check the following

If Using an External Amplifier

The P.CONT or REMOTE terminal on the external amplifier requires a “turn on” signal from the stereo. This terminal should be connected to the BLUE/WHITE P.CONT wire on the Kenwood harness and not the solid BLUE ANT.CONT wire.

If Using a Vehicle Specific Harness
The vehicle has a factory installed amplifier and requires a “turn on” signal from the stereo. Make sure that the BLUE/WHITE P.CONT wire is connected to the vehicle specific harness and NOT the sold BLUE ANT.CONT wire.

The solid BLUE ANT. CONT wire is used to trigger a power antenna ONLY when the tuner is selected as the source. Using this wire to “turn on” an external amplifier or factory installed amplifier will only allow it to work when TUNER is selected. Please refer to your instruction manual for proper installation. If you are not completely comfortable with installing the unit yourself, we recommend that you seek assistance from a professional installer.

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