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Post by petero on Jun 25, 2013 14:18:02 GMT -5
I have another post here, in which I've explained the problem with my stock infinity audio (1999 MS ltd). There have been no replies here or on other generic car-audio forums that I've posted to, so this is clearly a difficult problem. I'm thinking that the source of my problem is the stock infinity amp. Now what should I do? I wouldn't mind replacing a component, but I really don't want to have to replace everything (head unit, speakers, and wires).
I've read extensively through the archives here, and there is a lot of confusing and contradictory information about how this system functions. It leaves me with a lot of questions.
Is there a way to replace the amp (with aftermarket) without replacing the HU and speakers?
If I choose to replace the head unit with one that needs no external amp, will I have to rewire the whole system, or is there a way to use the existing wires? I know that I can get HU adapters from Crutchfield, etc, but don't these all function by sending the signal to the existing amp (which is faulty)?
What would you do if your amp failed to provide for one speaker, but you didn't want to spend much $$?
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Post by colted on Jun 25, 2013 14:35:58 GMT -5
just bridge it to the other speaker....tap the other line to the same working line amp output...  |
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Post by petero on Jun 25, 2013 16:40:24 GMT -5
Really? You mean just run a wire from the working 3.5" speaker to the 6" door speaker, right? I like how simple that solution is, but would it really work? I know very little about audio, but it seemed to me there would be two problems with doing this. First, the 8 speaker infinity system is set up for the door speaker to run mostly bass and the other speaker (the dash 3.5") to run midrange, so I don't know what that would do to the 6" speaker. Maybe nothing. Second, the impedance on that line driving the 3.5" speaker would then fall considerably, and wouldn't that hurt the amp or something?
Anyway, thanks for your help.
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Post by colted on Jun 25, 2013 17:54:40 GMT -5
My bad......misread your post, thought just one channel on your amp was bad and the other is working fine.....if that's the case, my advise on top would be just fine...otherwise you would really need a new amp.
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Post by colted on Jun 25, 2013 18:02:51 GMT -5
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Post by colted on Jun 25, 2013 18:03:54 GMT -5
Hope this could be of help...http://msport97.proboards.com/thread/5982
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Post by petero on Jun 25, 2013 20:57:58 GMT -5
I really appreciate your attempts to advise me on this, but I don't think the thread you linked to helps. That thread, and a couple others like it, tell you how to integrate a new head unit with the stock amp. He's got a new HU and adapters to connect to the existing wiring harness, and maybe a new amp just to run a new subwoofer, but the stock amp is still at the heart of the system. At least, that's how I read it. I wish it was that easy for me. And as far as I can tell, it seems like my head unit is OK, but my amp is fubar.
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Post by monty98 on Jun 26, 2013 9:49:06 GMT -5
I really appreciate your attempts to advise me on this, but I don't think the thread you linked to helps. That thread, and a couple others like it, tell you how to integrate a new head unit with the stock amp. He's got a new HU and adapters to connect to the existing wiring harness, and maybe a new amp just to run a new subwoofer, but the stock amp is still at the heart of the system. At least, that's how I read it. I wish it was that easy for me. And as far as I can tell, it seems like my head unit is OK, but my amp is fubar. Unfortunately myself I have not been able to locate much if any information on the specifications of the infinity system or even a simple schematic. I am curious myself on how to service the system, but so far have had no luck with any manuals anywhere. Once we locate a manual we can really get to the heart of the problem here though |
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Post by colted on Jun 26, 2013 10:10:03 GMT -5
I really appreciate your attempts to advise me on this, but I don't think the thread you linked to helps. That thread, and a couple others like it, tell you how to integrate a new head unit with the stock amp. He's got a new HU and adapters to connect to the existing wiring harness, and maybe a new amp just to run a new subwoofer, but the stock amp is still at the heart of the system. At least, that's how I read it. I wish it was that easy for me. And as far as I can tell, it seems like my head unit is OK, but my amp is fubar. Unfortunately myself I have not been able to locate much if any information on the specifications of the infinity system or even a simple schematic. I am curious myself on how to service the system, but so far have had no luck with any manuals anywhere. Once we locate a manual we can really get to the heart of the problem here though here are 2 threads I found from another forum that could probably be of help: www.3si.org/forum/f6/315-watt-mitsubishi-infinity-cd-audio-system-7-speakers-296006/index3.htmlwww.3si.org/forum/f6/infinity-amplifier-schematic-1-3-a-434334/ |
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Post by monty98 on Jun 26, 2013 15:22:12 GMT -5
Ok based on some information I've been gathering and looking at here is what I have found.
1. There are adapters to put a new head unit in to connect to the stock amplifier. However, these new head units require "pre-outs" you cannot simply divert the speaker to the amplifier. (shop at Crutchfield and tell them what you have for a stock radio system they'll get you hooked up)
2. Yes there are aftermarket amplifiers that you can use. However, the wiring harness would most likely be wrong, and you would need to know which wire was for which speaker (little sound testing wouldn't be hard)
3. From what I understand if you choose to NOT use the stock amplifier there are the actual speaker wires in the back of the head unit area meant to be there for the Montero Sports that did not get the infinity speaker amplifier. (since from what I've been reading the Infinity system could be dealership installed too)
4. Anything sound good OP?
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Post by petero on Jun 26, 2013 20:15:10 GMT -5
Yeah, now those are interesting threads. It appears there are other amps that will work with our connectors, and there have been adapters available. Unfortunately, I can't find any of these after a quick search. I'll keep looking. I have also found the montero audio wiring diagrams, which were provided in a post that was a response to a similar question that I posted to a car audio forum. Here's the link: www.diymobileaudio.com/forum/general-car-audio-discussion/150456-please-help-figure-out-why-one-speaker-muted.html Here's the direct link to the wiring diagram. www.justanswer.com/car/0mzzu-wiring-diagram-radio-1999.htmlThis diagram shows the color of the speaker wires. I did not know that my car might already be wired for the stock sound. That would make it easier to adapt an aftermarket head unit while bypassing the stock amp. I'm going to try to look for those wires this evening. Another option for me is to buy a cheap two channel amp to take the place of just the failed channel in my stock amp. It would require complete knowledge of the wiring, including the DIN cable, and the ability to tap into the source wire and then back into the speaker wire. So then I'd have the stock amp driving seven speakers and a new amp driving the driver's door. |
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Post by mudrunner on Jun 29, 2013 13:06:45 GMT -5
Personally if you don't want to spend much money, I would find a pawn shop or something similar to replace amp and such. Had a buddy who did that and it worked better than a cheap one he bought new.
Also just out of curiosity I read both your posts and was wondering did you use the one speaker that is not working in a known working spot to make sure that speaker works? Also did you check continuity not just Ohms? could still be corrosion or something else preventing the wire from working right.
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Post by jkdv8 on Jul 5, 2013 14:30:33 GMT -5
What i would do is find out whether its the amp or not. If it is i would replace it. easiest way is find a four channel amp to fit in the stock amp location then just tap into the individual speaker wires using the diagram above. trying to run just the one speaker off a another amp would be more trouble than its worth and would mess up the sound stage among other things even if you were to do both left and right of the affected channel. below are links to the adapters to run a stock infinity head unit to an aftermarket amp or vica versa. Also when i was adding my components up front I was under the impression each of the speakers ran off a separate channel with different frequency responses so adding it to another channel probably wont work and would possibly overload the amp. also wouldn't worry about the low voltage trigger because most amps nowadays have an automatic turn on when it senses a signal. If not just tap into the antenna turn on or a switched 12V lead. www.discountcarstereo.com/C2R-MIT.htmlmitah brand www.autotoys.com/x/product.php?productid=1234#detailed |
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Post by davidtemple on Jul 12, 2013 23:15:51 GMT -5
I have a used Infinity 2003 MS factory amp, if that would work I'll sell it cheap to you
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Post by nickgonz1 on May 15, 2016 20:22:32 GMT -5
Hi do you still have that amp. I have an o3 and someone took it out. Don't know why. And I have a aftermarket head
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