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When I plug my steel into input jacks of my amp if I step on the volume pedal it sounds as if I had a speaker blown. If I move my plug to effects jack volume is fine and speaker shows no problem. I wo
Nothing other than plug into different jacks to check that speaker is not blown. That is fine.
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1. Sounds like it's the input jack., but it could be the volume knob. Have you tried turning Gain1 and Gain 2 or the Clean Channel volume? Try them first when you're plugged in to the jack on the left , then when you're plugged in the back. If none of these work, it's most likely the preamp.
2. Even if the preamp is shot, there's a quick fix - get a guitar preamp or an effects pedal - they have volume and tone controls.
3. Finally - many pros just plug into the aux jack(on the rear panel) and control the volume and tone through their instruments.
Hope one of these works. Good Luck.
Some hopefully easy fixes : Input jack could be the problem, or connection from the amp to the speaker. Does the speaker hum a bit with the volume up almost all of the way without anything plugged into the unit? If not, check the connection from speaker to amp.
If it does hum slightly when u crank the volume, check your input jack -- it might be jacked up (pardon the pun) and you can fix that easily by soldering in a new one.
DO NOT try a guitar pedal as an effects insert via the back jacks... they are for an external line level EQ/Effects type unit. Your guitar pedal should NOT have caused any damage. Check the power adapter you are using with the BP200. The BP200 takes a 9 VAC adapter, NOT a 9VDC type common to most pedals. You cannot use one of the Pedal Train type supplies with the BP200. Also check that you have the in's and out's correct on the pedal... backwards and they will cause what you are observing.. Verify your cables are good. The output of the pedal goes in the FRONT jacks of the amp. ONLY line level drives go to the back jacks.
Crackling is usally one or two things my guess would be bad grounding of the amp or bad connection with the jacks or plug it self try to make it crackle on purpose by jiggling the jacks see if it has any effect on the crackling try to narrow your possibilitys
Firstly make sure you are getting power to the speakers - there is usually a light to indicate that the speakers are turned on. If you DO get a light - then turn up the volume all the way and touch the green input jack with your fingers - that is the jack you would plug into the PC - when you touch the jack - you should hear a scratching sound come from the speakers - if u get NO sound - chances are that the speakers amplifier is blown (it is a small Integrated circuit that most electronic engineers would be able to repair)
This is probably not a DIY repair. You best take it to a repair shop. Likely the power amp has failed or other common problems are broken connectors/jacks, broken volume pots, and finally circuit board cracks.
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.
The send jack on your amp should be connected to the input jack on your pedal and the return jack on your amp should be connected to the output jack on your pedal. Read the manuals for both the pedal and the amp. If you don't have them you can usually find them on the websites of the manufacturers. Make sure your levels on the amp and the pedal are turned down when you plug them in.
I take it you have made sure that both the cable to the distortion box from the guitar and the cable to the amp are both good. From the description you give, it sounds like there is no signal getting to the pedal. If the cable is good, then the next likely suspect would be the input jack on the fuzz box. Try wiggling it a little with the guitar cable in place to see if it is loose. Some input jacks are unbelievably cheap and flimsy. A crackling sound (static like) is almost always a bad connection. If it was the output jack, I would think that the guitar signal would come through a least a little bit, but you might want to try wiggling that one, too, if the input jack isn't the culprit.
Another possibility to check is the battery, but this doesn't seem as likely. Some effects units devour batteries, especially units that use 9V batteries. I have a multi effect pedal that kills a 9V in about an hour.
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