Question about Alpine MRD-M605 Car Audio Amplifier

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CUR showing on the display

I am facing a problem with the current. in the manual it says if CUR appears its high current flow problem. but i cant find the problem. the amp appears normal when the sub output from the player is off. whn i switch it on only a bas comes and the CUR starts flashing. what can i do abt this am curious.. i am using Pioneer TS-W101SPL 600 RMS (dual 4 ohm connected in parralel) it seems both my amplifier and sub is ok.. plz help me out wth this :)

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Re: CUR showing on the display

Have you measured the DC resistance of the woofer to determine if it's OK? You will need to disconnect it from the amp. Check each voice coil individually.


If you disconnect both speaker wires from the amp, does it still show an overcurrent condition?



Posted on Oct 21, 2007

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1 Answer

What is cur code

Hello, i had the same problem, double check your grounds, thats all it was.
For reference, the error code "CUR" means in the manual (
• The amplifier has been shutdowndue to excessive current. • Find and eliminate the causeof the excessive current, thenturn the power off.
Please Note: Underpowering subs can make your amp goes to protection.

Dec 28, 2009 | Alpine MRD-M1005 Car Audio Amplifier

1 Answer

My mrv f345 amp reads CUR on display screen and has no sound.

That error appears usually when the speakers (especially subs) aren't getting the current they need from the system. Check your wiring and make sure you're using the appropriate gauge wire. Too small of a gauge in wire can cause this.

Sep 30, 2009 | Car Amplifiers

1 Answer

Amplifier displays "CUR"

Hello anwbrown,

The "CUR" display means that the amp is drawing excessive current and the protection circuit is activating. Too low impedance or shorted speakers will cause the amp to draw excessive current.

The Alpine V12 is a Class D mono amp with only one set of speaker outputs. All versions, M301, M501, and M1001 are only stable to 2ohms. Assuming that all 6 of your connected subwoofers and speakers are 4ohm and they're all connected in parallel, the amp sees a .67 ohm load, far below it's rated impedance.

When brand new, the amp could probably operate at low to moderate volume levels without drawing excessive current. But as electronic components age, their tolerances change and they become less able to withstand excessive current or mismatched impedances.

I'd get a 4-channel amp and drive the 4" speakers off the front channels and the 6X9's off the rear channels. And just power the subs off the V12 making sure that they are connected to show a minimum load of 2ohms.

Hope this helps.

Jul 27, 2009 | Alpine MRV-F345 Car Audio Amplifier

1 Answer

How do you get it out of cur mode

Hello whatup_132,

If the M605 fails and displays "CUR", it means that there is excessive current to the amp.

The most common causes for excessive current draw is operating the amp into a lower impedance than it is rated to handle, shorted speaker voice coil(s), and/or shorted or grounded speaker wires.

The amp can operate into a load no lower than 2ohms. First power everything off and disconnect the positive amp power lead temporarily (easist way is to just pull the fuse). At this point you should ONLY have the ground and remote connected. Reconnect positive (insert fuse) and turn on the vehicle ignition and your head unit. If the amp still displays the "CUR" error, the output MOSFET's are probably defective and the amp requires repair or replacement. If it powers up normally, reconnect the speaker wires until you locate the faulty one, and then correct whatever is causing it.

Hope this helps.

Jul 17, 2009 | Alpine MRD-M605 - V12 MONO AMP 600WX1 RMS...

1 Answer

CUR display

Hello yte1771,

You can download the manual from Crutchfield.

The "CUR" display is an indication of excessive current and is most likely caused by too low impedance or a fault in the wiring or the amp itself. It's probably not your cap.

Hope this helps.

May 18, 2009 | Alpine MRD-M605 Car Audio Amplifier

1 Answer

CUR on alpine MRD M 605

check your ground and make sure you battery power is connect properly

Apr 14, 2009 | Alpine MRD-M605 - V12 MONO AMP 600WX1 RMS...

1 Answer

CUR is showing on the display

The amp will reset when you cut the power off to it. Disconect bat for 30 sec and reconect. But to be honist with u if the wire jumped out and grounded some how during a high level, there is probley internal damage done.

Oct 17, 2008 | Alpine MRD-M605 - V12 MONO AMP 600WX1 RMS...

1 Answer

CUR showing on the display

This means too much current, find and eliminate cause of excessie current and turn power off, also possibe power and ground are not big enough .Recommend 4guage wires

Oct 17, 2008 | Alpine MRD-M605 Car Audio Amplifier

1 Answer

Displays "CUR"

You probably have too low of an impedance load on ot (too many speakers or wrong kind). It has to have a minimum of 2 ohms on each channel, or 4 ohms if bridged (that means don't put 2 subs on the bridge!!).

Sep 22, 2007 | Alpine MRV-F345 Car Audio Amplifier

2 Answers

Power comes through ground

Check to c if any power wire shorting to ground

Aug 20, 2006 | Sony XM-2200GTX Car Audio Amplifier

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