Question about Marshall Mg50dfx 50-Watt Combo Guitar Amplifier

4 Answers

Marshall MG50 DFX amp line out/headphones not working

I have a Marshall MG50 DFX amp.
When I plug the jack and headphones into the line out/headphones socket it has no effect, the amp continues to play through the main speaker. Could you please let me know if there is anything I need to do to use the amp through headphones?
Thank you.
Paul Danvers

Posted by on

Ad

4 Answers

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Habit-Forming:

    Visited the website for 3 consecutive days.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 18 Answers

Contrary to what's posted above, the Marshall MG series does not pass the speaker power output through the headphone jack, and inserting the headphones into the jack does not disable the speaker. The headphone amp is a separate circuit and it's input is taken before the master volume. So Jan's post is exactly right. Turn off the master volume and turn up all the other gain/volumes as high as they will go. The other issue is that the headphone jack's output does not drive low efficiency headphones well, so you need some headphones similar to Sony's MDR-V700s to hear it well. Earbuds just don't cut it.

Posted on Jan 16, 2015

Ad
  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

I had the same issue, I thought my headphone output wasn't working. It turns out it was but I couldn't hear any sound in my headphones because the Clean channel and the Drive channel volumes were turned up only a little and the Master volume was turned up high, thus the main speaker sound drowning the headphones sound.
FIX: Turn the Master volume right down. Adjust Clean channel and Drive channel volumes to your taste, et voila, you can hear your headphones!
I hope this fixes your issue.

Posted on Jan 10, 2015

Ad
  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    New Friend:

    An expert that has 1 follower.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 31 Answers

Well, your problem isn't very descriptive to help troubleshoot online, but first question would be; are you using the correct size jack? The second would be have they worked before? If the answer is yes to both questions, then the problem might be the jack itself on your amp. There is a prong inside the headphone line that hugs the plug to your phones. If the prong has loosened enough where the connection is poor or not at all, you will not get any sound. If the headphone jack has NEVER worked before, than it sound like a wiring issue on your board somewhere. If you are not familiar with a soldering gun, then I would take your amp in to get it fixed. should be a minor quick fix costing anywhere between $15-$30 to have a shop do it. Hope this helps. (also try different headphones if you haven't already. Could be a bad pair)

Posted on Mar 09, 2010

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 2 Answers

The speaker signal passes through the jack and is interrupted when you plug headphones in. Some possibilities are:
The jack contacts are bent and not disconnecting.
Your headphone plug is not going in all the way and not interrupting the speaker circuit
The jack is wired wrong.

Posted on Jan 04, 2011

1 Suggested Answer

Anonymous

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Electricity flowing. Why won't amp turn on?


What type of Marshall, please?
First of all, control the fuse and let me know.

Oct 12, 2015 | Marshall Amplification Music

1 Answer

My Marshall MG50 DFX Has an awful buzzing sound that comes out of it after startup.


I would check C22 and C24 the main smoothing capacitors. They can fall out at worst or just have bad solder at best.

Mar 20, 2017 | Music

1 Answer

Marshall MG100 MG DFX. Full speaker noise with all volume knobs turned to zero and on all settings. When the amp is switched on there is a horrible loud buzz/growl that can only be left on for a split...


well theres only 3 sections of the amp the problem can be in. Pre-amp, Power amp, or speaker. First Unhook the speaker. If you can turn on the amp after that and hear your guitar through the headphone jack this means your pre-amp is ok. at that point you can just take a voltmeter across the 2 terminals of the speaker to see if oyu have 4, 8, or 16 ohms. that'll prove the speakr is good. I'd also try to connect and disconnect the pedal a few times to see if the normals in the jack on the amp are just being stupid. if all this concludes no success, you sir have a power problem.

Aug 31, 2011 | Marshall Mg100dfx 100-Watt Combo Guitar...

1 Answer

Hi There, i have a Marshall MG100 DFX Series Guitar Combo Amp,and when i plug my guitar in i get verry little,or no sound from the guitar imput,can you please help. Thank you.


Try exceriszing the connections for input and headphone jacks ( just be inserting qtr inch connector in/out of jack ) a few times. then plug back into your input. if that didn't solve anything while amp is on move the input jack around ( up, down, left, right, ) and see if this makes the signal cut in/out to normal playing. if so you just have broken solder connections on the jack. Also you may just want to test your Speaker to make sure no problems exise there. ( Voltmeter across + and - terminals ) prolly 8 ohms but will most likely state on woofer. if not of this fixes your problem let me know and i'll throw some more steps your way.

Jan 24, 2011 | Marshall Mg100dfx 100-Watt Combo Guitar...

1 Answer

I have a Marshall MG100HDFX 100-Watt Amplifier half stack (solid state) and I now am not getting ANY sound out of the amp. I changed the fuse and the power module behind the fan, and still no sound,...


plug headphone in the effects send jack...If you get somme sound (won't be too loud) there, that means preamp sections are probably ok. Drive a signal into the effects return jack... If power amp responds, it is OK... If both these are OK, then suspect the switch contacts on these two jacks that forward the preamp to the power amp when effects unit is NOT plugged in.
These contacts are a chronic problem.

Sep 19, 2010 | Marshall MG100HDFX 100-Watt Amplifier Head

2 Answers

Ihave a marshell dfx 100 guitar amp...as i play it the volume lowers and will eventully fade to nothing... any ideas..


For a test in troubleshooting, see if level from the headphone jack fades or not when this happens and get back to us.

Sep 02, 2010 | Marshall Mg100dfx 100-Watt Combo Guitar...

1 Answer

My marshall mg50 dfx keeps cutting out and stuttering, any idea what the problem is? It sort of cackles as well when the volumes increased giving me different variations in sound.


As a guitar player myself learn that not all speaker from some amps hold the ouput wattage. The fuse could ba a problem or the speaker is giving out.

Jun 29, 2010 | Marshall Mg50dfx 50-Watt Combo Guitar...

2 Answers

Marshall MG50 DFX, the volume knob OD channel crackles


Either the control is damaged (happens if they get hit) or it is possible the circuit board it is mounted on has broken solder OR worse, a crack near the control. The unit will require servicing. Parts are readily available.

Jan 28, 2010 | Marshall Mg50dfx 50-Watt Combo Guitar...

1 Answer

Marshall MG50 DFX makes a squealing noise on power up


Yep, chalk that one up to poor design...The amplifiers are going out of balance during power up and down. Two seconds is pretty long... Try turning down the gain during power on and see if that affects it.

The pop on turning off is normal... None of these have speaker disconnecting hardware that is necessary for very high power amps. The biggies have hardware that checks amplifier is balanced before connecting the speakers and a relay also cuts the speakers immediatley on power down. As power goes up and down the circuitry comes to equilibrium and until it does, strange things happen.

I would investigate the CONDITION of the filter caps for the main power because if they age to a higher internal resistance that COULD cause the high freq oscillation on power up... Two seconds is MUCH too long.

There should also be some non-electrolytic caps NEAR the power output transistors to handle high frequency supply power bypassing.

Check the power bypasses that service the preamp stages. Look for pregnant electrolytic caps that have failed.

Ultimately, you MAY need an oscilloscope to isolate the high freq problem.

Jan 03, 2010 | Marshall Music

Not finding what you are looking for?
Marshall Mg50dfx 50-Watt Combo Guitar Amplifier Logo

2,581 people viewed this question

Ask a Question

Usually answered in minutes!

Top Marshall Music Experts

Michial Gueffroy

Level 3 Expert

1140 Answers

matt martin
matt martin

Level 3 Expert

1257 Answers

rjivaro

Level 2 Expert

158 Answers

Are you a Marshall Music Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...