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Marshall jvm1 volume,gain letters wearing away?

On the jvm 1 marshall amp,the gain knob letters are wearing off from the metal face.

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

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

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Posted on Jan 02, 2017

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SOURCE: MG100HDFX Amp - crunch setting seems too loud

There are 2 channels, Which means there are 2 sets of knobs ... One for clean and one for crunch. Start out with a low master volume and set up the crunch, Then the clen and switch between the 2 and make adjustments until they match volume wise ... Then turn the master up.

Posted on May 23, 2009

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SOURCE: I have a Marshall guitar amplifier model MG50DFX,

I have the same problem. It would appear that this particular series of Marshall amps have a "bug" in them. There are at least 10 other MG50DFX owners, some here at Fixya, others at Harmony Central that have the same problem. Check out the other replies to this problem here at Fixya. I'm gonna try spraying the jacks and pots with a good cleaner. Then, I'm gonna try inserting a patch cable between the FX in and out. This seems to produce sound according to the other replies here at Fixya. Although this may not fix your amp, or mine, for that matter...I'm gonna try everything I can before I have to send it off for repairs.

Posted on Oct 28, 2009

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SOURCE: 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.

Posted on Jan 31, 2010

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SOURCE: 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.

Posted on Feb 15, 2010

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SOURCE: Behringer's Ultrabass BXL3000 Gain knob broken

You need to replace the potentiometer with the broken shaft. You can open the unit and try to get a part number or go to Behringer parts to get an exact replacement. The pot must be matched for value, taper, and mounting and shaft dimensions.

Posted on Jun 07, 2010

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1 Answer

The guitar is not amplifying


faulty lead? when the lead is plugged in turn the amp distortion on (may be called 'gain') and when you tap the end that goes into the guitar with your finger you should hear a buzz. try another lead if not, and if it still doesn't work make sure that volume is up on the amp and the guitar. there may also be a knob in the back of the amp, turn that up too (but not all the way or when you do get it working you'll blow the speakers out).

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Jvm 410h squeals with feedback in most distorted modes at about half volume even when guitar volume is off


Test if it does it with the guitar cable unplugged from the amp. If it does, then it is time for servicing... If not, then you have a system grounding problem and the guitar cable is "leaking" signal into the amp. This can happen even if guitar is NOT connected.

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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.

Mar 12, 2011 | Marshall Amplification Marshall MG4 Series...

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I run a pod HD 500 into the amp and It breaks up, like there is a blown speaker sometimes.


The Marshall is a super clean acoustic amp.

The POD is overloading the amp.

Try the electric guitar input and keep the gain on the amp down, keep the EQ level and use the POD and the end volume to adjust the final volume.

The normal inputs is for a low output acoustic pickup - the POD is a high output electronic source.

Start with the Marshall gains low and get the clean sound good, then work on the gritty sound.

The amp is voiced for a sweet clean sound - if you want grit'n'ball change to a 50w Marshall valve head and a 4 X 12 cabinet.

Horses for courses

Mar 07, 2011 | Marshall Amplification Marshall AS100D 2x8...

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Its a marshal 8080 valvestate 80 v and it buzzes and some of the knobs crackle when turned,


Buzzing could be normal for this amp, especially if you have the gain cranked way up (or the volume way up) see if the buzz goes away when you turn the gain/volume down. If not, there is a problem that needs to be properly diagnosed by the amp tech at your local music store. The crackling is also unfortunately rather normal for an amp that's a little older. Oxidation builds up inside the knobs and makes that noise as you turn them. If it only happens when you change settings I wouldn't worry about it, but if it gets bad, a tech guy can clean it out for you.

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Marshall jvm 410h i'm getting loads of feedback when i use od1 or od2 orange or red mode


Dampen the strings of your guitar. If feedback disappears, then you need to move the amp so it can't resonate the strings of the guitar. OD1 and OD2 WORSEN the chances of the feedback into the strings. When this occurs you can often see the strings vibrating without the player picking them.

Nov 22, 2010 | Marshall Amplification Marshall JVM Guitar...

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