Question about MA Audio HK4000D Car Audio Amplifier

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I just bought a MA Audio HK-4000D mono amp. I plan

I just bought a MA Audio HK-4000D mono amp. I plan on running 2 15 inch Memphis Mojo that are duel 2 ohm voice coils.If i wire both subs down to 1 OHM will the amp beable to handle it? I really dont want to blow the amp. It says it is 2 OHM stable so my question is will it be stable at 1 OHM?Any info would be great.

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Posted on Jan 02, 2017

  • 37 Answers

SOURCE: amp problem

Some amps very in what will happen first, some will blow the fuse and some may go in protection mode or the sound will come and go.

Posted on Dec 06, 2008

blueextc3221
  • 15935 Answers

SOURCE: ma audio hk 4000d

you have definately blown a output channel, or power supply. Send it in for warranty.

Posted on Jan 09, 2009

  • 102 Answers

SOURCE: how do i drop it down to 0.5 ohm

there are no settings on the amp, if it is made to be stable at .5 ohm you will need 8 voice coils to make .5 ohm, if your subs ar 2 ohm, you will need 4 coils to make .5 ohm when hooked in parallel

Posted on Sep 23, 2009

  • 53 Answers

SOURCE: i have 2 dvc 4 ohm alpine type r 15's and 2 svc american bass

Hi mate very nice amp you got there here is the specs for it



Model: MA Audio HK401SX
Hard Kore Series 1800 Watt 1 Channel High Performance Class X Car Amplifier
1 x 1800W RMS @ 0.5 Ohm Mono
1 x 1200W RMS @ 1 Ohm Mono
1 x 650W RMS @ 2 Ohm Mono
1 x 500W RMS @ 4 Ohm Mono
Fully Unregulated MOSFET Power Supply
2 Ohm Stable @ Mono
1 Ohm Stable @ Mono
0.5 Ohm Stable @ Mono

if you have 2 12s just bridge them and you will have 650wrms at 2ohm running to them or one sub at 4 ohm 500w rms ps they should pump iam running 2 12s with just 360rms at 2ohm and they do the job good luck


Posted on Oct 19, 2009

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Driving the amplifier too hard causes it to go into protect mode to prevent damage. The amp periodically recovers and operates normally until the next overdrive peak hits it.

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Wire diagram for subwoofers


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I have a ma audio hk-602sx and my protect light wont go off and somthing is clicking inside and as it clicks the protect light blinks.


Disconnect the speakers and then try it again...there may be a shorted speaker or wire if the amp comes out of protect after you disconnect the wires...if the amp stays in protect after you disconnect the wires then there is a problem inside the amp with the circuitry and it will need to get serviced by an electronic tech

Jan 23, 2011 | MA Audio HK602SX Car Audio Amplifier

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I have 2 dvc 4 ohm alpine type r 15's and 2 svc american bass


Hi mate very nice amp you got there here is the specs for it



Model: MA Audio HK401SX
Hard Kore Series 1800 Watt 1 Channel High Performance Class X Car Amplifier
1 x 1800W RMS @ 0.5 Ohm Mono
1 x 1200W RMS @ 1 Ohm Mono
1 x 650W RMS @ 2 Ohm Mono
1 x 500W RMS @ 4 Ohm Mono
Fully Unregulated MOSFET Power Supply
2 Ohm Stable @ Mono
1 Ohm Stable @ Mono
0.5 Ohm Stable @ Mono

if you have 2 12s just bridge them and you will have 650wrms at 2ohm running to them or one sub at 4 ohm 500w rms ps they should pump iam running 2 12s with just 360rms at 2ohm and they do the job good luck


Oct 19, 2009 | MA Audio HK401SX Car Audio Amplifier

1 Answer

My ma audio hk 898 will power on but will not push subs at all what can i do


Hello 76firebirdfo,

If there's no sound at all from the subs and you know they are good, there's probably no output from the amp. It's either wired incorrectly or it is defective.

If there's some sound but just not loud enough, then either the amp is not getting enough of an input signal from your head unit, or the amp settings are not adjusted properly. Adjust the crossover and gains for the best output to subs. LP filter on, crossover frequency at about 80-100Hz, and gain to maximum without distortion when head unit volume is at about 3/4 maximum.

Hope this helps.

Jul 14, 2009 | MA Audio Hard Kore HK-898 Car Audio...

1 Answer

Need to pick perfect amp


I suggest to use separate amps to your sub, get a 2 channel amp for your sub and 4 channel amps for your speakers.

Here are my Top 5

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1 Answer

Ma audio hk 4000d


you have definately blown a output channel, or power supply. Send it in for warranty.

Jan 09, 2009 | MA Audio HK4000D Car Audio Amplifier

1 Answer

My ma audio hk 4000 amp is powered on no sound coming thru subs amps brand new


If there is no protection light on, be sure the input is on. Some head units need to be turned on manually (factory set to OFF).
Verify the subwoofers are wired properly.
A list of your components would help to solve your problem.
If it is new, it should still be under warranty - worst case scenario output transistor(s) blown, or power supply bad.

Jan 09, 2009 | MA Audio HK4000D Car Audio Amplifier

3 Answers

Confused about system


If what you're telling me is correct you're trying to drive a stereo sub -woofer with a mono amplifier. If so, that could be a bad situation for the amp, if the voice coils are not wired together correctly. Before we go too far, I have some questions I need answered.
1. Is the MA unit an M1889i?
2. Do you have the 4 terminals of sub-woofer tied together. For example the 2 positive terminals are tied together & the 2 negative terminals are tied together?
3.How do you supply 12VDC to the amp?

While I'm waiting to hear back from you, I'll try to draw a schematic (wiring diagram) of the way it should be wired for your particular setup that I'll send to you.

Mar 06, 2008 | MA Audio M1889I Car Audio Amplifier

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