I've got a 98 XJ. My brother outfitted it with a kenwood head unit, mtx terminator amp and sub, and some speakers. I put the head unit in wrong once and we think it might've bent it. It works on and off, going into protect mode after a few days of me resetting it. I recently discovered that the RCA cord going from the head unit to the amp had broken in the amp. I replaced it, hoping that was the cause of the protect problem. Played great last night and this morning but now went back into protect. What can I do? Do I need to get a new head unit?
Kenwood head unit protect mode
RisingJeeper
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I've got a 98 XJ. My brother outfitted it with a kenwood head unit, mtx terminator amp and sub, and some speakers. I put the head unit in wrong once and we think it might've bent it. It works on and off, going into protect mode after a few days of me resetting it. I recently discovered that the RCA cord going from the head unit to the amp had broken in the amp. I replaced it, hoping that was the cause of the protect problem. Played great last night and this morning but now went back into protect. What can I do? Do I need to get a new head unit?
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no error message, just flashes PROTECT
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that is the error message. If you don't have the owner's manual, you can look it up on the kenwood site probably.
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make sure the speaker wires are not grounding out and make sure you have no less then 4 ohms on each channel
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You have any preference on company? I've had good results from my kenwood til recently and haven't fully explored other options. Oh I've got the KDC-248U. It's a bit outdated, kenwood released at least one new, similar model. I'm hoping mostly for good price. Not worried about the best music quality
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Never dabbled in wiring before. More info on that? Otherwise I can just google itkingcat400 said:
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how many speakers?
does the fade/balance work properly?
is the amp wired via rca outs or a line converter?
what speakers?
does the fade/balance work properly?
is the amp wired via rca outs or a line converter?
what speakers?
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109 Posts
Amp is wired with RCA. I think there are stock speakers plus better door speakers and a big ole sub in the back. Trying to get sound system specs from my brother, he did the work. Balance and fade work fine, all modifying settings using head unit (haven't tried changing amp levels) work fine, just reset when I reset the head unit. Which is expected
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Amp is 200w mtx terminator, sub is I believe 12" mtx that came as package with amp.
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I'm always more worried about sound quality and I go with the motto "you get what you pay for". I just took out a JVC kd-nx5000 and replaced it a pioneer avh-x7500bt. I was surprised with the difference. The updated technology was that much better to me. It's iphone 5 compatible which is what sold me. Although I'm sure something else will be out better in the next few months :laugh: But I'll update in another year or so and sell this one :2thumbsup:
As for company preferences, not really. I stick with the name brand and go by features, ease of use, etc. Right now the pioneer was the best in a niche of single din flip out screens.
Get yourself a multi-meter to check your wires. It'll come in handy in the future for many. many other things.
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from a generic (non brand specific) perspective: a protection fault is usually caused by an amplified "amplified out to speaker") and not a preamp resistance being out of spec. It can be a short, a wrong speaker resistance (using 2ohm on 4ohm impendence or 8 ohm speakers), or even overpowering your speakers. As mentioned before: check the speaker out wires, the radio spec and the speaker spec.
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I'm going to guess that the fronts are wired 2 or 8ohms with the stock speaker in the mix. I have had both cause protect. Try un hooking the stock speakers and try again.
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This^^. I just replaced a perfectly good 10 year old Sony hu with an Alpine one for the updated features- bluetooth, phone capabilities, remote control. I have to say, the Alpine does sound much better than my old Sony and it only ran me $130. Plus, I'm selling my old unit to my neighbor's buddy for $40.
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109 Posts
Haha! Found which speaker is causing the problem. Currently running my radio without the rear passenger side speaker haha and it works! Now I somehow have to figure out where along the wires there is an insulation problem. Yay
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109 Posts
What?
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