Car audio systems can suffer from several major problems, mainly due to age and use over time. Like any product, car hi-fi equipment such as amplifiers, and have finally worn parts replaced, but that does not mean you need to replace the amplifier, because it happens because of something small, like a wire, which can can be exchanged.
If you and your stereo speakers began to hiss or comments fuzzy sound that it is important that you consider, first, that’s not the amplifier before you proceed, do something drastic, such as replacing your stereo. Take a moment and see if you can figure out the problem. Then replace the old with the new country.
The second major problem with the right amount of voltage when the voltage is not possible to get by. To ensure that sufficient strength to get through, one meter to the power lines and power your car to add. A voltmeter to measure voltage of the battery to get through to the amplifier. If not, then you may need to change the battery, alternator and a power supply, depending on what the real problem.
If you have not found the problem will check whether the fuse of the correct size for the entrance is in power. Contact the car audio experts, that the correct fuse. You can usually find a specialist in online forums that can perform specialized calculations to determine whether a backup is the right thing for your amp.
Further tests must be performed to see if the amplifier is the cause of the speakers today and with an amplifier with a set of speakers. If the sound is distorted, the AMP, if not, perhaps the signal problem.
If there are problems with the signal that can be wrong because the RCA cable. Connect the other RCA cable work, and if the vote is lost, it’s just RCA cables should be replaced.  If the problem persists, you just need a new amp. take your time and effort to sort the problem, but saves you money and your beloved amp for a few good years. (*)

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