Question about Marshall Amplification Marshall MG250DFX 100W Guitar Combo Amplifier

1 Answer

Sound fades after 15-20 minutes

No sound, however, power is getting to speakers/phones; evident by the bump as you switch the power

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Marshall Amp... Master
  • 5,603 Answers

There may be thermal sensor that protects the power amp that is sensing over temperature and turning off the power amplifier stage.

Try cooling with a fan and see if it lasts longer. If you are obstructing the cooling in any way, try to avoid that.

As a test, leave on for an hour and THEN try driving sound. If it works for a while, then driving is what is overheating it.

VERIFY that you are NOT running too low impedance speakers!!!

Most amps will drive down to 4 ohms. That is a single 4 ohm speaker or two 8 ohms in parallel MAX.

Posted on Sep 09, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

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:

1 Answer

Muffled Sound From Speakers.


Please illuminate me explaining the word "Muffled" means and i will be glad to help you out...

Feb 10, 2013 | JBL *new* Jbl Jrx115 15" 2-way Speaker...

1 Answer

No sound coming out of speakers but lights moving on board


The Efx 12 has two outputs monitor out as well as mix out ( XLR sockets ). If the level bars are moving its an indication that the mixer is working. Have you tried headphones out as well as monitor out.
What is your amplifier and speaker setup- you have not mentioned it at all.
Even if any PFL switch is on you won't get sound out of the speakers.
PFL stands for Post Fade Listen and when any of the 12 channel PFL switch is on only the headphone out put will work.

May 18, 2011 | Soundcraft Efx12 - 12 Channel Sound Board...

1 Answer

The problem with my marshall ma100h amp is that out of the box brand new it stopped working within a few days. Earlier I turned on the amp power switch and let it warm up. About a minute later I kicked on...


Brand new? Take it for warranty repair IMMEDIATELY... don't mess with it !!!

The only thing for you to check is that you did not turn on "STANDBY" as this shuts down the power amp and the capacitors will bleed off and sound will fade. Try switch in both states before complaining

ONLY use the amp in STANDBY for a brief period (20 seconds) to let the tubes warm up... Leaving in STANDBY for a long period straains the input filter capacitor. If you are done with using the amp, turn it off...

Jan 14, 2011 | Marshall Amplification Marshall MA100H and...

1 Answer

Faded out the sound and will not turn power up


Make sure the STANDBY switch is not pressed. It will fade sound out on the first 8 channels and keep it off.

Sep 07, 2010 | Yamaha Emx312s Stereo Powered Mixer...

1 Answer

Roland XP 50 head phone problem


Looks like capacitor problem.Check power supply section also.

Mar 07, 2010 | Music

2 Answers

No sound from Yamaha Electone HS-6


First check if you get sound from the headphone jack.

Do you hear anything as the power comes on from the speakers..? A slight bump?

A lot of these dead audio things can be traced to a failure at the expression pedal. often these use a light dependent resistor and the illuminating lamp burns out. This is all down by the pedal.

Many of the Yamaha organs, including the FX20 I have, have circuitry that checks that the power amp has DC balance before a relay closes to connect the speaker. A failure in the amp can cause dead sound as well.

Jan 12, 2010 | Yamaha Music

1 Answer

Handmade guitar amp, when i plugin the guitar i start playing, but then signal gets lost, the sound dissapears, and then it appears again, and after minute or two it dissapears. i've tried to put full...


have you got valves fitted to the amp as they can cause fading if old >damaged >not fittted properly also check the speaker connects and try playing half volume the output should be steady.. you say its handmade if you made it pull out the amp board and check your soldering joints look to see fi there is any that need resoldering as they may be getting hot and causing a resistor to fade..

Aug 02, 2009 | Orange Crush 30R Reverb Guitar Amplifier

Not finding what you are looking for?
Marshall Amplification Marshall MG250DFX 100W Guitar Combo Amplifier Logo

235 people viewed this question

Ask a Question

Usually answered in minutes!

Top Marshall Amplification Music Experts

matt martin
matt martin

Level 3 Expert

1208 Answers

Vito Vacirca Jr.

Level 2 Expert

140 Answers

The Knight
The Knight

Level 3 Expert

73619 Answers

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

Answer questions

Manuals & User Guides

Loading...