Question about Marshall MG15DFX 15 Watt Compact 2 Channels 8 Speaker Practice Amp

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The fx sound bad

The bass don't change turnd up or down all the fx sound the same it don't sound like the demos on youtube

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Have you tried cleaning it

Posted on Jan 06, 2013

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Posted on Jan 02, 2017

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Peavey decade manual


Recommend an Ashdown or Fender with a 15" speaker, they will give a good sound, are gig-worthy, and will last. I use a Behringher 120W for rehearsal work, it only has a 12" speaker and thus cannot give a good 'presence', also I have been reliably informed, a lot of custom chips are used in thier amps.
Don't forget, a bass 'E' goes down to something like 60Hz, and a good speaker and amp are a must for bass work

Feb 12, 2012 | Peavey Music

1 Answer

My rumble 30 bass amp makes a lot of bad noise when i plug it in. it started off when i first started playing it and it worked fine, then after a few minutes it started making the noise. i've tried...


How new is the amp?

A single faulty solder can do that...I'd try returning in to the seller.
Have you tried a different amp with the same equipment?

Sounds like a wiring issue.

Hope I've helped
PvT

Sep 25, 2011 | Fender Rumble 30 30watt Bass Guitar Combo...

1 Answer

While playing, the power cord was accidentally pulled out. When plugged back in, the amp cuts on, but there is no sound and the led lights for peak and tone selection flash.


You have probably blown a tube. This amp has one 12ax7 and one 12au7 in the vintage preamp. You can try replacing the preamp tubes, but it can be quite dangerous if you don't know what you're doing!

Sep 20, 2011 | Ampeg BA600-210 Bass Combo (with )

1 Answer

Marshall mg100hdfx head. I get no sound whatsoever plugged into the guitar input but the controls seem to work as I can hear changes in the light ambient static. I will get sound however if I plug directly...


You MAY have a broken input jack. If you can hear changes from the overdrive gain control, that control is just one stage away from the input jack. Also there is a capacitor C60 that is for RF bypassing and if that shorts that will kill the audio. Yes, inout jacks get destroyed by tripping over guitar cables... that is why you run the cord through the amp handle before plugging it in. Of course verify your guitar and cable is good using another amp.

Aug 30, 2011 | Music

1 Answer

I have a grounding problem with my new Ibanez GSRM20 bass. I don't have an amp, and run the bass directly into a recorder (home studio) and headphones. There is a hum that disappears when I touch...


You need to ground the recorder. Use a WYE connector to get access to the barrel of the guitar cable and find a good ground on a three wire cord wall receptacle. You don't say what model recorder you have which would have been helpful to us. We are surrounded by electric and magnetic fields and typically you can pick up 10 volts AC (with no real current) just as an antenna from the building wiring. Many music devices that run on "wall wart" power adapters have this problem. Also keep guitar away from wall warts as they emit strong magnetic fields for those that use conventional transformers.

Aug 02, 2011 | Ibanez GSRM20 GSR Series Electric Bass

1 Answer

My DL4 doesn't sound as it should in my series fx loop. Is there any way possible to solve this problem WITH OUT putting it directly into the amps input? I need help!!! I play my amp wich is class A...


your parallel loop only has input, a series has out and in, you need to patch the out of amp to the in of the pedal, and out of the pedal to the in of the amp fx loop. then you need to make sure your loop is turned on, via switch or footpedal.

Jul 05, 2011 | Line 6 DL4 Delay Modeler Effects Guitar

1 Answer

I have the QSC PLX3602 connect from dbx pa as bridge mono to the sub woofer jbl mrx518. It works well. But now when I change it as stereo to the main jbl mrx515, I only hear the bass sound, no more...


Hi,

I don't think that there's anything wrong with the amp.
I'll think you're using a x-over, connected to the low-output.

Just a shot,
Gerard

May 10, 2011 | QSC PLX3602

2 Answers

My monitor is styill for working but the tweeter dont make any sound. i think its blowed up, is there a fuse a something that could be replaced in the amp?


no fuse in there unfortunately.

The problem could either be a blown tweeter (but that would likely cause distortion rather than silence) or a fault with the amp or crossover. Often it seems a relay is at fault in these instances with dynaudio monitors. In any case, unless you have considerable electronics knowledge (which I think it's fair to assume you don't ?) you won't be able to fix em yourself. Give dynaudio an email or call - they're helpful.



Dynaudio North America
1140 Tower Lane
Bensenville, Illinois 60106
USA

Phone (630) 238-4200
Fax (630) 238-0112

For Service: service@dynaudiousa.com

Apr 25, 2011 | Dynaudio BM5A MKII Monitor Studio Active

1 Answer

I have a Peavey MAX 112 Bass Combo amp. When I turn on the amp and have it plugged into the cord and bass, it immediately begins emitting a "whump whump" sound similar to the sound a beating...


The amp is doing what is called "motorboating". This is usually caused when the voltages to sensitive preamp stages are inadequately filtered or regulated and the sudden load of the output stages cause a dip in the voltages sent to the preamps which in turn vary the input to the output stages starting the cycle over. This will require electronic troubleshooting and if your not skilled in that, then it is NOT a DIY fix. What you are seeing is NOT normal, there is a defect.

Apr 22, 2011 | Peavey Electronics Peavey Max 112 Bass...

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