Question about M-Audio Studiophile DX4 Computer Speakers

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M-Audio DX-4 speakers blowing fuses

When I turn the speakers on I get a loud hum that quiets down after about 10 seconds - however as soon as I plug anything into the RCA or 1/4" jacks the fuses immediately blow out and speaker is dead

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  • Anonymous Apr 07, 2009

    Same problem - 3 blown sets of fuses right in a row!

  • Chris Janes
    Chris Janes Apr 14, 2014

    I too feel this pain! Please, can anyone save us?!

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  • 22 Answers

Could be a problem with the wires? good luck

Posted on Feb 14, 2008

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Disconnect the input and see if it hums in the absence of an audio source. A bad audio cable shield or unwisely-routed audio cables will allow entrance of unwanted signals from external power sources, magnetic fields, even dimmer-controlled track lights. Sometimes, simply reversing the orientation of the ac power plug can eliminate humming.

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I have the same model as you.

Plug in the transmitting unit into a good working power outlet. Make sure you have the audio connected to a loud source. Turn on the source device producing the loud audio to be transmitted to your headphones. Now see if the transmitting unit's LED light is on. Check headphones for audio. (May have to tune in the headphones and adjust its volume as well).
I recommend that the source of your audio have its built-in speakers off, while still providing audio out to your transmitting unit, via an external audio output. Check your source manual or look for audio jacks on the front or back. There may be a setting to turn this on and for the main built-in speakers to be turned off as well.

If this does not work, unplug the transmitting unit, and then plug it back in again, after waiting for about 10 seconds - all while audio is being provided to the unit. It should come on.


Remember that if the audio to the transmitting unit is quiet OR off for about one minute, the transmitting unit will turn off and you will hear FM noise, loudly, on your headphones. This is due to the "lack of audio" timer built-in to the transmitting unit.

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have someone check speaker ground to the TV chassis. Your speakers are picking up reverb from the Video Signal.

Aug 19, 2009 | Vizio L37 Television

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Power goes off!


I have the same model as you.

Plug in the transmitting unit into a good working power outlet. Make sure you have the audio connected to a loud source. Turn on the source device producing the loud audio to be transmitted to your headphones. Now see if the transmitting unit's LED light is on. Check headphones for audio. (May have to tune in the headphones and adjust its volume as well).
I recommend that the source of your audio have its built-in speakers off, while still providing audio out to your transmitting unit, via an external audio output. Check your source manual or look for audio jacks on the front or back. There may be a setting to turn this on and for the main built-in speakers to be turned off as well.

If this does not work, unplug the transmitting unit, and then plug it back in again, after waiting for about 10 seconds - all while audio is being provided to the unit. It should come on.


Remember that if the audio to the transmitting unit is quiet OR off for about one minute, the transmitting unit will turn off and you will hear FM noise, loudly, on your headphones. This is due to the "lack of audio" timer built-in to the transmitting unit.

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1 Answer

The power fuse blows as soon as the unit is plugged in


There is a problem with the amplifier within the sub. Many of these units never completely turn off. They are often set to automatically startup when a signal is detected. This may be the case here. The loud hum as a defect in the output amp section. At this point you probably have a blown amp section. The "protection" for this is to cause a dead short that will open up the fuse. This unit will require service. It is unlikely that any service info is availabel to the general public either.

The fix could be simple, but without seeing the unit, I can not state that for sure.

Keep us posted.
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Sure just be carefull how much power you put into them!
Please rate this answer!

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First,
Disconnect any input cables from the amp. Turn down the volume controls and disconnect the speakers. Power back on. If you still blow fuses with nothing hooked up, have the amp fixed.
If the fuse holds, shut down and connect the speakers, leaving the volume controls down. Power up and see if your fuse holds. If you have hum, an output transistor is most likely shorted. If you have no noise, SLOWLY turn up the volume controls and listen for the hum. If all is quiet, turn down the volume controls and connect your input cables and turn the volume back up. Noise? check your cables!
Mister Phil

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I think the volume increasing or decreasing of you woffer box has been got damaged please change your button as quickly as possible...
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You need to use a multimeter to see if the remote turn-on voltage at the amplifier is dropping to near 0v as soon as you switch off the head unit. If it's not, you need to determine why it's not switching off quickly.

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You will need to have the amp bench tested at full load to see if there is a pending problem. It will need to see with speaker loading resistors, how much current the amp is drawing and at different frequencies. if the amp checks out with the proper current, at the rated output, have the speaker checked out. Good Luck

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