20 Most Recent Alpine MRP-M500 Car Audio Amplifier Questions & Answers

Is it possible that you may have over driven the unit and blown either the power supply or output stages? Well, if the amp is getting power as you indicate the issue lies within the stages I just mentioned.

Hello! Here is the link to the manual. Hopefully it will help you resolve this problem asap. Conector de entrada del altavoz Alpine MRP M500 12 16

Do you have a multimeter?

either something in your amp burned up, or the audio wires going from your cd player to your amp are bad

Try making sure your sound input to the amp is good (could be a bad output from the radio or RCA cable), could also be a bad input from the amp, bad outputs from the amp or even a bad sub. You have to check each of these and eliminate the problem. I would make sure you have a good audio signal to the amp first.

The RCA connectors are usually associated with the audio, not power. I would expect that if you open the amp you'll find that the RCA connectors are soldered directly to the printed circuit board (PCB). They may be right-angle type connectors and stand off the board.

You may be able to replace the connectors, but it will probably require some modifications. You should be able to find some at a Radio Shack store. If you can secure them to the chassis (cover) you can run heavy wires such as 16 or 14 gage directly from the connectors to the PCB.

If you are not intimidated by electronic soldering, then it should be possible without too much trouble. If you can find chassis-mount RCA connectors, you can drill small holes in the cover for screws to hold them to the chassis, if there is sufficient room available.

Be sure to avoid touching the PCB if possible, so you don't damage it by static discharge. If you must touch it, ground yourself first.

Good luck!

Hi, please do the checks at the following post and let me know if you have questions; http://www.fixya.com/support/r9389300-stereo_says_protect_or_clicks_off_when

sounds like you have an earth prob

Hi, the safe mode indicates the speaker impedance is too low. It doesn't reflect the power to the amp. Check the resistance of the speaker and wires with an ohmmeter and verify it is 2 ohms or greater. Can you tell me what speaker you have?

you can find your wiring diagram here
http://www.crutchfield.com/S-lCf6ewrWNQM/learn/learningcenter/car/subwoofers_wiring.html

Select from the list shown which describes your amp and subs (ie 2 channel amp with 2 4ohm subs)

Hope this helps and please rate, thanks

Any time that there is a rattling sound from the subs, that indicates that they are probably blown. How were the subs tested ok? If the resistance of the subs is still close to OK, that is good, but it doesn't necessarily indicate that they are working properly.
Try using different subs at a lower volume, or turning down the gain slightly.

Sounds like blown subs, in the process of completely dying out, or a loose wire, possibly inside the box or from the box to the amp. Have your subs tested at a sound shop, or using a multi-meter, check for resistance across the sub terminals. An open line indicates a blown sub. I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514