Question about Marshall Amplification Marshall MG2FX Guitar Combo Amp

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Marshall MG2FX. Delay tap button seems to be stuck on ? The delay time can't be adjusted and keeps pulsing through the amp on all settings...

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Replace the switch.

Posted on Dec 01, 2014

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SOURCE: marshall MG30FX loud tapping sound in time with delay even when no guitar plugged in and effects turned off

Hi J Wade. I'm Dave P. I'm not a guitar amp expert or technician but I've been using amps and effects for 35 years and there are a couple things I can suggest.

That kind of periodic noise/switch noise can be a symptom of having the polarity of the amp reversed. If your amp has a 3-position OFF/ground switch, try reversing the ground. If it doesn't, take the plug and turn it around. Just don't get near a microphone unless you're sure your amp is grounded the same as the P.A. It could fry your lips off.

Dirty switches to that too. You said the noise is in time with the delay's tap time which is set by a foot switch. If tapping that switch the first time generates a pop, the delay may have catch it and is repeating it. Turn off the amp, remove the delay foot switch and turn it back on. Still noisy? If not, give the foot switch a good cleaning.

When you turn the EFFECTS knob up, is it scratchy? Might need the potentiometer cleaned. What happens when you specifically turn the DELAY level down all the way while using the other effects? Noise still there?

That's all I've got. Hopefully, it was helpful. Don't wrack your brain over this too much. There could very well be an internal problem with your amp that will require a trip to the shop. You don't want to open it up yourself. Rock on but be safe.

Dave P.

Posted on Aug 22, 2012

Testimonial: "Very fast and useful response. Thanks for the help."

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Marshall Amplification Marshall MG2FX Guitar Combo Amp power turns on but no sound


Hi!
At this point, I would just take it to a tech rather than poke around in it. It sounds like the power section is the problem as you have guessed, but without the technical knowledge you'd be shooting in the dark. That particular amp is right on the line of being expensive enough that would be worth repairing, but you might do just as wel to check Ebay for another used one.
Good Luck!

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1 Answer

User manual for DOD DFX9 DIGITAL DELAY GUITAR PEDAL


Can't find a manual but can still explain. Delays, chorus, flangers, and reverbs are all the same effect except the different names of them will allow you different adjustments. Chorus usually has a width control which controls pitch shifting. Flangers and delays will have a feedback control which simply means, how many times you hear the echo. On reverb units, room size means how long of echo(even though it;s short) you want. Delay is the same with much longer echo, feedback is the same as on flangers except the flangers time is very short meaning the effect is at almost the exact time resulting in feedback causing a metalic sound. I probaly just confused you but good digital delays usually have all the features and will usually do all 4 effects depending on how you set them. If you want delay, set width on 0 and adjust time and feedback. For flanging, adjust width and speed and feedback. Chorusing, adjust time, width, and speed. Reverb, adjust time, set width on 0, and feedback. I see it has a level(mixture, how much effect you hear), and a replay(feedback, how many times you hear it), and a delay knob,(how long the echo will be) The range/mode switch allows for settings of diferent time lengths and INF setting allows for infinite repeat. Hope this helps.

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1 Answer

Marshall MG30FX loud tapping sound in time with delay even when no guitar plugged in and effects turned off


Hi J Wade. I'm Dave P. I'm not a guitar amp expert or technician but I've been using amps and effects for 35 years and there are a couple things I can suggest.

That kind of periodic noise/switch noise can be a symptom of having the polarity of the amp reversed. If your amp has a 3-position OFF/ground switch, try reversing the ground. If it doesn't, take the plug and turn it around. Just don't get near a microphone unless you're sure your amp is grounded the same as the P.A. It could fry your lips off.

Dirty switches to that too. You said the noise is in time with the delay's tap time which is set by a foot switch. If tapping that switch the first time generates a pop, the delay may have catch it and is repeating it. Turn off the amp, remove the delay foot switch and turn it back on. Still noisy? If not, give the foot switch a good cleaning.

When you turn the EFFECTS knob up, is it scratchy? Might need the potentiometer cleaned. What happens when you specifically turn the DELAY level down all the way while using the other effects? Noise still there?

That's all I've got. Hopefully, it was helpful. Don't wrack your brain over this too much. There could very well be an internal problem with your amp that will require a trip to the shop. You don't want to open it up yourself. Rock on but be safe.

Dave P.

Aug 22, 2012 | Marshall Amplification Marshall MG30FX...

1 Answer

My husband purchased one of your xr8600 peavey mixer the problem hes having is he cant get the echo settings right.please can you help.


View videos on YouTube regarding "mixer setup". Find the parts of setting up of "effects". Don't worry that you have a different mixer, the principles are all the same for analog mixers. Steps are this: Set the EFX send level for EACH of the input channels (knob above each channel gain) for the proportion you want for each channel. Check that the level you are sending does NOT cause the effect clip light to light very much. Set the effect you want, delay, echo, etc. with the selector knob. Advance the output sent to the power amp with the two knobs in the upper right of the panel. Adjust the "time" knob for the delay or effect depth you want. Then go over the same settings in the same order until you get the sound you want.

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1 Answer

My boss DD-3 makes a strange tapping sound on all modes. tapping sound gets more frequent when i turn the delay time pot to the right. its like a little tap sound getting into the circuit with the guitar...


Check your power source or battery. The sound is probably due to the internal processor recycling due to watchdog timer. If power is OK, then service will be necessary to repair the problem.

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1 Answer

I have an MG30 FX amp. In manual mode when I change channels amp seems to work incorrectly. E.g. i select clean, then set up delay. When I change to crunch then, there's no delay, though from the manual I...


Typically ONLY one effect will be active at a time unless there is a specific mixed effect available. The gain levels between the different effects are often not too consistent. In summation, this is probably the nature of the beast.

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I have 2 marshall mg100hdfx heads, i want to run them together, how do i wire them?


You have to use seperate speakers for each. These are not designed for any form of "bridged" operation.
You would have to wye the inouts from your source.

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2 Answers

Long delay between singing into mic and hearing voice in speakers


Usually delay is associated with "reverb" not echo. If you are in a large room, the room acoustics can add reverb without the benefit of signal processing.

Reverb NORMALLY passes the inout signal as is and then adds in a delayed version on top.

The delay should be less than the room size delay.

Try turning off all effects as a start. There is some "transport" time if it goes through a digital signal processing.

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Marshall DSL 100 - volume fades away and gradually comes back on


IF this is a vacuum tube unit, these symptoms are that of a tube that the heater is intermittent, that is it cools off due to a break and then liights again.

Open the back and observe the heaters in the tubes. DO NOT be fooled by some that have TWO heaters in them. (use a mirror if necessary) A single one that comes and goes can cause the problem and the voiration can make it come and go. This behavior in a tube is NOT somthing readily spotted in a tube checker. The delay in fading and coming back would be the delay in warm up following a heater going out and cooling.

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