Question about Alpine MRP-M650 Car Audio Amplifier

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Should I buy

I have 1 400 watt rms 4 ohm subwoofer, would this amplifier push it okay?

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Re: Should I buy

If the power rating of the woofer is accurate, this amp would be a good choice.

Posted on Jan 01, 2008

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En modo bridgeable a cuantos omhs es estable y cuantos watts rms arroja

Amp is not powerful enough to power the subwoofer. You will burn out the amp.

Oct 11, 2012 | DHD NTX-2126 XLR Car Audio Amplifier

1 Answer

How many watts does this amp put out

50 watts RMS x 4 at 4 ohms (75 watts RMS x 4 at 2 ohms)
150 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)

Feb 19, 2012 | Alpine MRP-M650 Car Audio Amplifier

1 Answer

How many watts is it?

KA3 offers 125 watts RMS at 4 ohms, 200 watts RMS at 2 ohms, and 250 watts at 1 ohm. The high-current section offers 50 and 75 watts RMS at 4 and 2 ohms, respectively

Sep 30, 2009 | Jensen KA3 Car Audio Amplifier

1 Answer


All amps aren't created equal. More exspense amps put out "cleaner" power. You need to know what the RMS power rating is for the amp at 8 ohms and 4 ohms. Also, is the speaker an 8 or 4 ohm speaker? How you wire a speaker or speakers (series or paralell) can change the ohms (resistence) which will change the power put out of the amp. Also, I'm assuming you are setting it up in mono?

Jun 22, 2009 | Pyle 2 Channel 4000 Watt High Power MOSFET...

2 Answers

Infinity 1211a @ 2 Ohms

Hello monkey_flea, Your subs will share the amp output. And if you are not careful, you'll end up blowing them. The amp puts out 1300 watts RMS at 2ohms, the subs have an RMS power range of from 75-350 watts, and you'll be driving them with 650 watts each. A better power match would be to series the subs to present an 8ohm final load. This will reduce the output power to a level the subs can handle. Or you could buy 2 more 12.1's and connect them series-parallel for a 4ohm load and each sub would still be getting 325 watts RMS, just about the maximum they are rated to handle. Hope this helps.

Jun 03, 2009 | Infinity Reference 1211a Car Audio...

1 Answer

Trying to figure out what kind of amp i got amercian pro vs-3507?

The VS3507 Is a class D monoblock.
Your optimum wiring for this amplifier is a 2 Ohm load - so it produces its full potential power of 350W RMS.

To Achieve a 2 ohm load, the most common load is one of the following...
(1) Dual 4 Ohm Voicecoil Subwoofer Wired in Parallel.
(2) 4 Ohm Voicecoil Subwoofers wired in Parallel.
(1) Quad 2 Ohm Voicecoil Subwoofer wired in Parallel/Series.
(1) Single 2 Ohm voicecoil subwoofer.

American Pro VS3507 2000W Car Audio Monoblock Amplifier
American Pro VS3507 Monoblock Amplifier Details
  • Built-In Crossover
  • Variable High/Low Pass Filters
  • Phase Shift Control
  • Subsonic Filter
  • Bass Boost Control
  • Dancing Lights at the Rhythm of Music
  • Protection Circuits
  • Gold Plated Terminals
  • Power & Protection Circuit LED
  • 1 x 250 Watts RMS @ 4 Ohms
  • 1 x 350 Watts RMS @ 2 Ohms Thanks for using FixYa - A FixYa rating is appreciated!!

Jan 29, 2009 | American Pro Car Amplifiers

2 Answers

Support Question about RMS

you are going to need an amp that can supply the right amount of rms power to make it sound good. these sony subs are rated for 380 watts rms. so in order to find an amp that will supply two, you must multiply that figure by two. so you will need an amp that can supply around 500 to 750 watts continuously (or rms). also you are going to want an amp that is either class d or class ab rated. these amps are built to push subwoofers exclusively and will give you the best efficiency and sound out of your subs. you will also want to get an amplifier is a monoblock amp, and not a stereo amplifier. make sure the amp can put out that rms rating at 2 ohms as two 4 ohm speakers equal 2 ohms wired in parallel. i have a kenwood kac9152d that puts out about 2000 watts max at 2 or 1 ohms (900 watts rms) that i used with my two sony xplod 10's for about 2 years. it was kick ***! now i dont know if you need that much power but they will handle it as long as you dont push them too hard for long periods of time, otherwise you might end up blowing them up! (depending on the box size that is, and the quality of it as well...)

i have years of car audio installation experience and can help with setting up and wiring any mobile entertainment system you can imagine. may i ask what kind of music you listen to and what kind of box do you have for these subwoofers?

if you have any questions email me at

Jan 22, 2009 | Pioneer Car Amplifier GM-5100T - 2CH 760...

1 Answer

I found this amp and I can't seem to figure out what the wattage is?

You are probably aware on how to use these output figures, but I'll write a quick explanation on the specifications for future readers anyways :)

The concpet CC-452 amplifier has the following power output specifications:

Calculated at 14.5 volts DC;

At 4 ohms per channel - 45 watts x 2 (RMS)
At 2 ohms per channel - 70 watts x 2 (RMS)
At 4 ohms bridged - 150 watts x 1 (RMS)

This means that your amplifier would provide 45 watts of power each for your front speakers, which are normally a 4 ohm load per side (45 watts for left, 45 watts for right), that's unless they are one of those exotic higher end brands (eg: Boston Z6s which are 3 ohms). Rarely, you will find speakers that are rated at 2 ohms per side, but in this instance the amplifier will provide 70 watts of power into each speaker. On your speaker specifications, you will find a value termed "nominal impedance" which will give you the ohm rating of the speakers being used..

On the other hand, if you "bridge" both channels into a single channel (using a diagram often marked on the speaker terminals of the amp), you could then provide 150 watts into a subwoofer (providing it was a 4 ohm woofer).

It's not recommended to use this amp bridged under 4 ohms..

Some subwoofers may be lower than 4 ohms, and you will not be able to use this amplifier for these types of speakers without risking amplifier failure. Also, some subwoofers may have 2 seperate voice coils, and you will have to use both channels of the amplifier seperately (not bridged) in order to correctly connect this type of speaker for use.

Oct 28, 2008 | Concept CC-452 Car Audio Amplifier

2 Answers

Amp getting really hot

well it is getting hot due to the amp drawing and pushing alot of current. try getting lower gage wiring for power to the amp and lower gage speaker wire.

Apr 20, 2008 | Power Acoustik PS2-1200 Car Audio...

1 Answer

Rockford Fosgate 501bd question

that amp should work fine with those speakers,just make sure that they(speakers)are wired for 2 500-600watts coming from amp, you should be getting 250-300 watts per speaker,just dont crank your gain too high on the amp.

Aug 29, 2007 | Rockford Fosgate Power 501BD Car Audio...

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