I have a SONY XM-SD22X, and it was working fine. The LED light turned off and it did not want to turn on again. I checked the fuses, and they were fine. I read the manual and it said to check the ground. I checked it and it was working fine, but know it doesn't want to turn on again. I already checked the fuses and they are fine. So what is the problem?
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The red light is usualy an indicator that the amplifier is going into protection. There could be a number of reasons that this might happen. Here are some: 1. the load that the amplifier is trying to drive is not compatible with the amplifiers specifications. 2. the cables leading from the amp to the speakers/sub woofers are shorting somewhere. 3. the amplifier is heating up above its capability. 4. the amplifier is not recieving the apropriate amount of power. Check if any of these are the reason but if you give me more details such as when does the red light go on and what you have connected to it and how, i will be able to better assist you.
Your XM-SD22X amplifier only has 2 channels.
If you want to run 4 speakers then you could parallel 2 speakers on each channel but you need to check that the impedance is not too low.
If it is too low then put 2 speakers in series on each channel but this will not be as loud.
Check the fuse on the amplifier; if it's good, then you need a multimeter or voltmeter for further testing. With the meter's black probe on your amp's ground terminal and the radio turned on, both the power and the remote terminals should test at about 12 volts. If neither terminal shows voltage, you may have a problem with your ground connection; if both do, there's a problem with the amp.