Question about Alpine MRP-M650 Car Audio Amplifier

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Alpine MRP-M650 problem

The Amp has power goin to it and there is 14v comin out of the ground which makes me believe that it has the sufficent amount of power needed but teh LED light does not turn on and nothing comes out from the sub at all. The fuses all look and tested fine which then brings me to asking part. Thanks for any help.

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The built in power supply is probably bad. This supplyds the voltage from the 12volts and inverts it up to 20 to 30 mvolts DC. You will need to get a manual to service this unless you know the inverter circuit really well. good Luck

Posted on Jun 30, 2007

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Posted on Jan 02, 2017

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1 Answer

How do you figure out the amount of amp your altinator need to put out to run a multi amp car audio system


Your amp will have a peak and steady wattage specification. Then the formula is Amps = Power/14. You can make an estimate of peak and steady amps from that. It is worth noting that at a lowish voltage like 12V, high power produces high currents.

The job of the alternator is to charge up the battery, which you would know. Once the battery is charged up fully the alternator is effectively disconnected by the regulator. So to prevent the battery from running down in use the alternator needs to supply enough current to your audio amps, plus enough to run the car as well.

A typical alternator in a medium size car can produce about 14V and 50-70A, This is regulated to about 10A at 14V. So if your audio amps pull about 5A they would be developing about 5 x 14 = 70 watts steady. Peak power spikes can be buffered by the battery. Most car audio systems are nowhere near this powerful.

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My mrp m650 alpine amp power light is on but no sound. it works if i hook it to other vehicles but not in mine.


Check your speakers and speaker wires to make sure you have no shorts or grounds. Not knowing what vehicle you are putting the amp in, there is also a possibility that there may be a stock amp in the vehicle. If this is the case, you may have to rewire the speakers and bypass the stock amp.

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What is the best amp for one 15" alpine type r?


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I have a sony 1000w zr1852. The power and ground cables touched at the amp. I fixed the connection but now the power save light is on. what could be wrong? thanks


Sounds like there's either some fuses blown, or a short circuit happened inside the amp. However usually they're pretty good about not shorting out. Check your connection at the battery, In-line Fuse, Cap, Distro, and Amp and make sure everything is connected fine. Check the Alternator in your car to make sure it's outputting the right voltages, and the battery to make sure it's between 12V - 14V. I've had some weird things happen over the years with my Car Audio, and it always ends up being wires or fuses.

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When i turn my alpine MRP-M650 amp on there is a click in the sub and then nothing else. when i was driving with volume down low the sub just stopped working.


sounds like a short. did you check the amp fuse and the fuse on the power wire (under the hood) make sure there are no wires touching. most common is the wires to the sub touching on the amp. let me knwo if that helped

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1 Answer

Soundstream 1.800 amp keeps blowing fuses


Hi,
Check your power wire & ground wire if there is any exposed wires that is touching any surface/wires. A blown fuse means there is a short in your system. Also make sure you are feeding your car amplifier with 12v to 14v (some amplifiers can handle up to 18v).
Here is a link about fuses, also this website will give you everything about car audio.
http://www.bcae1.com/fuses.htm
Hope this answer your inquiry. Have a blessed weekend.

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1 Answer

How to hook up the wiring on the crunch 520.5 need to know the gage for power


Hello,
  • I would go with some good 8 gauge. More than that for this amp would be overkill and a waste. Many people thing thicker wire is better but that is not the case. To thick of wire to the power feed can draw to much power and send the amp into protect mode. Also to thick of wire with an insufficient amount of power can actual hamper the amps true abilities.
  • Use stranded copper wire not solid copper wire for the best results of conductivity.
  • Make sure to run a 50 amp fuse inline with the power wire right off the battery. Amps surge and it is far easier to replace a $1 fuse than components inside your amp.
  • Your ground is best served running to a bolt in the floorboard. Using the same size, style and quality as your power wire is recommended.
  • Your remote wire will connect to the remote wire running from the back of your deck. The remote wire enables your amp to shut off when your deck is shut off. A simple 16 gauge stranded copper wire will suffice for the remote wire.
  • I recommend hooking the speakers up using one speaker per channel. I don't bridge amps really. If you want more power then buy a bigger amp.
  • The AV cords will go from your deck to your amp right to right and left to left.
  • That's the way to wire your amp.

Regards, Tony

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MAKE SURE THE GROUND IS GOOD ON BODY OF CAR BOTH UNDER THE HOOD AND WHERE YOUR AMP IS GROUNDED

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