Head Unit Cuts Out
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From: New York
Head Unit Cuts Out
I have a kenwood KDC-MP425 and i just installed the second set of pioneers into my truck. So i finished installing the speakers and deciced to crank it up to see how it sounds.
Before the new speakers i never took the volume level past 27, however tonight i decided to go a lil louder, so i went up to 30 about 5-10 seconds after word the unit just shutdown, and then powered back up instantly.
Then i tried it a second time and the same result only this time the unit would no longer power back up. So I pulled the dash apart to see if there was a loose wire, as i began to pull it out it began to reboot, as if it had just been installed.
Before the new speakers i never took the volume level past 27, however tonight i decided to go a lil louder, so i went up to 30 about 5-10 seconds after word the unit just shutdown, and then powered back up instantly.
Then i tried it a second time and the same result only this time the unit would no longer power back up. So I pulled the dash apart to see if there was a loose wire, as i began to pull it out it began to reboot, as if it had just been installed.
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From: Sugar Hill, GA
I tend to agree. The easiest way to trouble shoot something is to look at what you messed with last. Unless you messed with the wiring behind the head unit when adding the new speakers, that's probably not the problem. I used to have an Alpine head unit that did the same thing. When I switched to an external amp, no more problem.
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From: Bixby, OK
I've been having that kind of problem, but I don't know why mine is happening. I have a Blaupunkt Casablanca and I recently installed Digital Audio speakers, and now when I turn it up at all, after a few seconds, my DEQ on the HU just falls flat, but the HU stays powered up, then the music starts playing again and then the amp turns back on (has safety mode), so I know that it's not just the speakers, it also messes with the turn on lead to my amp, but if I have a CD playing, and this happens, the CD still plays, I just can't hear it, and my DEQ has no motion either..
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From: Sugar Hill, GA
On my Alpine the remote amp power trigger would drop out too. It would sound like to me, as triton_2002 offered up, that there is an impedance issue causing the amp to work harder and overheat in the HU.
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Some Of The Aftermarket Decks Require A Larger Power Wire That Must Be Run Directly To The Fuse Box To Power The Unit.. Might Try That First..
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From: New York
Thanx for all the help. I went through all your ideas, and still had the same prob so i called Kenwood to see what they would say.
Come to find out with the aftermarket speakers wired up the internal amp does not have enough power to push the speakers ad it just shuts down.(No safty mode however)
They claim that the Face only needs the constant 12 Volts.
As Always Thanx for the help
Come to find out with the aftermarket speakers wired up the internal amp does not have enough power to push the speakers ad it just shuts down.(No safty mode however)
They claim that the Face only needs the constant 12 Volts.
As Always Thanx for the help
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From: Bixby, OK
Well I know mine started doing this whenever I have it turned up at all, and it only started after adding the new speakers which are 4ohm impedance. It would be like hooking up 2ohm subs to an amp that isn't 2ohm stable.. the amp completely shuts off, assuming you have auto-protect mode.
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From: New York
Muffinman- I have 4 Pioneer Speakers and its not that it cant drive them its just that once it hits 30 it will just stop working as if the power wire were cut and then reattached, cuz it looses all the stored info.
Like you said RomerB2- I only really started having this problem after installing the second set of speakers. Kenwood claims all i need to do is amp the speakers to solve the problem and it may b the same with your head. They say that since my Spkrs are 50 Watt RMS and the face only puts out 22 Watt RMS that the face will do that. And there is no Protect mode on the Face.
Like you said RomerB2- I only really started having this problem after installing the second set of speakers. Kenwood claims all i need to do is amp the speakers to solve the problem and it may b the same with your head. They say that since my Spkrs are 50 Watt RMS and the face only puts out 22 Watt RMS that the face will do that. And there is no Protect mode on the Face.
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From: Bixby, OK
It's not that they're rated 50 watts RMS, and the HU is only 22, it has to deal with the impedance, I researched a little, and found that most HU's are 8 ohm stable, and some are lower, but if the speakers are less restrictive then the HU is going to feed too much power.. power the HU can't handle. But Kenwood was correct in saying if you were to hook up an external amplifier to your speakers it would work fine, assuming that the amp is 4ohm stable as well.
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From: New York
You just peaked my curiosity, and i looked in the manual for the face it says nothing about how many ohms the internal amp is good for. I do find that a little odd that they make the faces 8 ohm stable while the speakers are 4 ohm impedence.
So I am going to go back to best buy where i bought it and see what they have to say about it.
So I am going to go back to best buy where i bought it and see what they have to say about it.