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Stereo System Not Working

All of a sudden my system isnt working in my car. The speakers arent blown, i have reset the deck and the amp is fine...i dont know whats wrong!!

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Re: Stereo System Not Working

Often time, if a speaker wire gets "grounded out," in other words when a speaker wire gets shorted to the chassis of the car, it will prevent sound. Best thing is to check through the system with a multimeter

Posted on Jan 21, 2008

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Rockford Fosgate P3002 stopped working

push down and up on your subs and see if they make a starching noise, if they do then they are blown. take a test light to the amp, on the power and the remote and see if it lights up. if it does then turn the amp down and with a small speaker plug it in to the speaker outs on the amp and see if it plays if not then your amp is bad.

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My Alpine MRP-M650 Amp is acting up. When I start the car, if the volume is at low, the subs don't work. But when I turn up the volume, they eventually kick in, then I can lower the volume. But when...

There are a lot of things that could cause this issue ...
1. Your amp requires more power than it gets when you start your car, and needs to charge up before it can work. If this is the case, you should be able to give your stereo about 5 minutes to warm up at low volume and it should come on. This happens a lot with amps with built-in capacitors (capacitors give you stunning, instant kick when working, but require a bunch of power to initialize). If you wire a bypass switch for the power to your amp and bass components, you can turn it on separate from the rest of the car and allow it to charge before you start your car (just be careful to turn it off when you are going to be away from your car for a while since this will allow your system to drain your battery).
2. Your amp might be set incorrectly for handling the system you are running. If your Ohms do not match up exactly (8 ohm speakers with a 4 ohm amp -- it's the "Impedance rating") then the system should not work at all, or should burn out the amp ... but with a jury-rigged system it can work. If this is the case, I recommend getting a new amp that matches your speakers.
3. Depending on the amp, there might be a volume-based cutoff that is working improperly. Turn on the car with the stereo at low volume. While the speakers are still not working, check to make sure that the amp has power, and seems to be functioning correctly. If everything seems like it's on the up and up, but the speakers are not working, try changing the volume-filter options on your amp.
4. I put this last because it seems like you know what you are doing with the system setup, but it is possible that you have a bad connection between the speakers and the amp, or between the stereo and the amp. There could be a loose connection somewhere (either inside the amp, between the amp and the speakers at the jack, or between the stereo and the amp at the jack). If this were the case, everything would look perfect from a visual inspection, but there could be a tiny space, or corrosion in a connection. Turning the stereo up to a high volume could then bridge this short circuit, and the electric force could magnetize the connection shut, allowing you to then turn the stereo down with the working connection. The best-case scenario here would be an external wiring issue, where you can clean any corrosion off the connections with an eraser, and reconnect everything tightly fixing the problem. The worst case would be a short WITHIN the amp, which would have to be repaired by someone with a lot of time and a circuit tester -- in which case you might be better off trading the amp in for a new one.

May 26, 2011 | Alpine MRP-M650 Car Audio Amplifier

1 Answer

My 1994 e150 sound system sounds puny compared to what I believe stock should be. All the speaker work there just isnt much volume, bass, or treble. Is there an amp that boost the sound? where is it?

well first i would change all the mid speakers out to kenwood speakers and not the cheap ones cause the cheap ones are like stock speakers the more higher priced ones like the 80 dollar ones are equal to 300 dollar speakers then you should get a 2 channel or 4 channel MTX amp each speaker can take 150watts. your system would be alot better than stock. if anything look on that would be the best place if you dont want to go to a car stereo shop in your area. if you plan to keep the deck stock then you need a hi-lo adapter which will hook up to the right or left rear speaker and the remote wire needs to go to the ignition wire behind the deck

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Subs fading out briefly but speakers working fine

Holy mackerel you have a ton of power i bet that ****** is loudddddd-sounds like your charging system isnt quite keeping up with the amount of current draw that your amps can pull.Upgrade your alternator and look into a dual battery system using an isolator-that way your alt will charge both batteries but your amps will only pull off the one battery-you can look online into how to set that up its not that hard for someone that has managed to install the gear that you already have- Some folks if not most would encourage you to get some sort of capacitor to store power blahblahblah-BUT a dual battery system has waaaaayyyy more storage capacity than a capacitor does-check out the pro competitors online they arent using capacitors to run their stuff they use banks and banks of batteries to get their power-brother you need more juice

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Amp Turns on Fine, but no Sound

have you checked the levels on the ohms? adjust them higher if need be contact me on yahoo msgr if you need more assistance

jcbproducts-always forward


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Quick question, amp problem

make sure you ground wires arent shared, meaning run each ground wire from each amp to its own grounding point

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Is the master/slave switch set to master? Have you tried feeding the signal into a different amp to make sure that there is signal reaching the amp?

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No sound

you may have a blown speaker...many cd decks will shut off their audio circuits when a speaker is blown to protect from shorting out. Go to the back of the deck and try disconnecting speakers one by one. You will have to turn the deck off and back on each time. Hope this helps!

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