Question about Alpine MRP-M650 Car Audio Amplifier

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Fuse This alpine amp has 2 30 watt fuses, and I already have a 4 gauge wiring kit installed with a 100 amp fuse in the fuse holder would I need to put a 60 amp fuse into my fuse holder or would it be alright to keep the 100 amp fuse in?

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Re: Fuse

Try a 60 amp fuses if it doesnt blow when you crank it up it safer lest chance to frying something 100 amp is lots of juice

Posted on Jan 18, 2008

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What size fuse do I need on the power cord from the battery to the amp? thanks

It depends on the size of the amp. The best route to take is to purchase an amp installation that includes the power and ground cables, RCAs,remote turn on wire and...fuse holder with fuse. You choose the amp kit base upon wattage ofthe amp and they come in 0,4 and 8 gauge sizes.

Sep 23, 2010 | Legacy Audio LA930 Car Audio Amplifier

1 Answer

Toxic tx 600 amplifier

You need to get another amp for your sub. I would say if you want good quality go for MTX because I have had amps from MTX and never had a problem. what you need to know is look at the fuses on the amp if there are 3 of the 25 amp fuses on there then it should push out about 750 watts but on MTX they under clock the amp so it will push about 800 at 14.4 volts for that you will need a 4 gauge wiring kit with a 60 amp fuse in the fuse link. As far as your other amp hook up the speakers and tweeters to that but be sure to tune in down and you would need a 8 gauge wiring kit. I hope this helps you.

Jul 27, 2010 | Car Amplifiers

1 Answer


you want to put a 30A into the amp and the inline fuse that you put onto the wire should be greater than 30A but not too high for what the wire is rated. The best bet for wire is to buy a wiring kit which comes with fuse holder, right size fuse, wire for main power ground and remote. You may want to double check what is written on amp for the size to put in there. Technically you can put a 100A onto the wire if it is big enough and the fuse on amp will protect the amp from problems. Hope this helps, Good Luck

Mar 25, 2010 | Ultra Linear UL801 Car Amp

2 Answers

Car amp blows 12 volt wire fuse

the wire from your battery is blowing fuses? and you are using 20-30 A fuses? mine has a 100A fuse..look into getting new wire plus my wire is 4 gauge.., 1600 watts is too powerful for a 12 g wire and a 30 A fuse

Jul 26, 2008 | Car Amplifiers

4 Answers

3 amps 2 subs sound system for car, need wiring help

As i read your problem i can recommend you that connecting each of the hifonics amp to each hifonics sub with the same specs by getting the specs in interfacing the two or you can simply look to the output of the amp and the input of the sub and find a suitable plug that fits to them.

In the case if you want to run each hamp to individually run each sub but sharing 3 farad capacitor: what i can suggest is that you connect in parallel one connecting wire of each input or ouput of the amp or sub. Its like connecting a connector from each of the input or output of the amp or sub to one leg of the capacitor, and connecting two wires to the other leg, one is being connected to the amp or sub and the other wire is connected to the other amp or sub.

In the case of putting a circuit breaker at the car battery: what i can suggest is that you find an appropriate circuit breaker that fits the specs of the car battery then connect it in series on the positive supply or read the specs of the circuit breaker before you connect it to the battery. Having a circuit breaker is like having a fuse but with special advantages in favor of the circuit breaker.

In the case of having power to the amps you can run one power wire to the amps by dividing the power wire into two, one connected to the amp and the other wire to the other amp. Then you can connect each amp and sub in series individually by connecting one wire b/w amp and sub. I hope i solved your problem

Feb 08, 2008 | Car Amplifiers

1 Answer

Car amp re conecting the the battery

Hook up the battery, (the negative post) and then put the fuse in. This is the best choice because if you put in the fuse and then put the negative post back in and the wires slip when putting in the negative post, the fuse might blow due to the sparks. You will then need to get another fuse, which also mean sending more money.

Dec 04, 2007 | Scosche Industries EFX Amplifier Wiring...

2 Answers

Alpine MRV-1507 Running 2 Alpine Type R 1242D

If you are not using a capacitor at this point, i would recommend getting a 1 or 1.5 farad cap and adding it to the system to take some of the strain off of your electrical system.

next on the agenda is your speaker wiring, the mrv-1507 runs around 900 watts at 4 ohms bridged.. your speakers (I believe) have dual voice coils, so 4 connections total, if you are running 2 of the speakers this will be 8 connections total, in order to match the impedance of the amp you will have to wire the speakers in series/parallel. if you have never done this before, it is easy and will ensure you are running the set at 4 ohms (which will make a huge difference in and of itself).

take both speakers out, you are going to want to wire the positive from one coil to the negative of the other on the same speaker. do this to both of them, this should leave you with one positive and one negative unused on each speaker. now you want to hook both of your free negatives together and run it to the negative on your amp, then repeat the process with the positives.

this is going parallel (4 ohm / 2 coils = 2ohm) and series (2ohm x 2 bridged coils = 4ohm).

now your rms on the speakers is 500 watts each, so matching them to a 900 watt or so amp should work great.

when you are installing the wire, make sure the gauge is correct for the length of run and for the wattage, also connect your power directly to the battery or to a distribution block that is capable of handling the power. in all of my installations i run 0 gauge wire from the battery to a distributor block i mount on the firewall, then i run anywhere from 2 to 6 gauge wire to the amp depending on the wattage and run length.

for your purposes, if the length of wire from the battery to the amplifier is 13 feet or less, 4 gauge wire should be fine, if it is between 13 and 20 feet, i would consider buying 2 gauge wire for the install.

you didn't mention what size your fuse is, but i am going to assume it is 90-100 amp, for a 1000 watt amp i use a 150 amp fuse. if you can find a 130 amp fuse it should work fine.

a major thing to remember when installing an amplifier is that your vehicle's charging system was never meant to accommodate large loads for an extended period of time. connecting direct to the battery, using a stiffening capacitor, and properly matching impedance will go a long way towards helping to overcome the limitations. in the future, if you decide to go all out on this project, i would recommend getting a high output alternator, a battery isolator, and a deep cycle battery for the audio equipment. this will insure that you never kill your primary battery, and that you won't run into issues down the road with your vehicle electronics.

i hope this helps you out, if youhave any further questions, feel free to ask.


Nov 14, 2007 | Alpine MRV-1507 Car Audio Amplifier

1 Answer


Hi jimmyjames,


How do you have the wires hooked from the sony reciever to the inputs on the mtx? 

 Sounds like your Remote wire is way too big. it should be 14 guage.  It only sends a low voltage low amp signal.


Another thing that could be messing up the sounds is the routing of the wires.  you should have the power supply wires separate from the Audiop signal wiring.  Power should run down the Driver side and Audio down the passenger side.


When you answer I may be able to tell you more.


Oct 19, 2007 | Car Amplifiers

2 Answers

Protection Light irritation

If the amplifier goes into protect when there are no speaker wires connected to the amp, the amp is likely defective. The most likely culprit is shorted output transistors. If it's new, return it to the place of purchase for repair/replacement.

Sep 28, 2006 | Lanzar VIBE266 Car Audio Amplifier

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