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Post subject: EXP-1 Noise Problem
Posted: Sat Jun 21, 2014 9:57 am
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My EXP-1 expression pedal worked fine for a few months. Now I get tons of noise. It's like a static-y, interference sort of sound. I can put the slightest pressure on the pedal and I get it. When I use it for wah, it's pretty nasty. Basically, the pedal is useless right now for anything other than a quick volume cut. I've tried every variation of rig possible thinking that it might not be playing nice with other pedals. On it's own with no other pedals, static. I've tried in 3 different homes. Static. It's either the pedal or the amp, but the amp operates flawlessly otherwise. Anyone have this problem and know a fix? Or did I buy a $90 piece of crap?


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Post subject: Re: EXP-1 Noise Problem
Posted: Sun Jun 22, 2014 4:07 am
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I bought an Exp-1 about 1 year ago but i have never had similar problems...


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Post subject: Re: EXP-1 Noise Problem
Posted: Sun Jun 22, 2014 10:59 am
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When you say you tried it in different homes - you mean with other MIIIs?
Just checkng here, but other pedals shouldn't be conected directly to it - they should go in the guitar cable path or fx loop.


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Post subject: Re: EXP-1 Noise Problem
Posted: Sun Jun 22, 2014 11:20 am
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1. If it was working fine, and now isn't - can you think of anything you changed around the time it stopped working? Anything at all, such as adding a stomp-box pedal, etc.

2. Do you also have the Mustang footswitch(es) connected? Please itemise exactly and precisely, everything that is connected to your amp, in what order, and into which sockets.

3. Check that the EXP-1 cable is nowhere near the guitar cable, or to any other audio cables in the signal path. The digital signal from the EXP-1 can cause interference if its cable is too close to the audio cable. Similarly, check that the USB cable, if connected, is nowhere near the audio cable. Actually, just make sure that all audio cables are as far away from any other cable as possible!


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Post subject: Re: EXP-1 Noise Problem
Posted: Sat Jun 28, 2014 4:23 pm
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To answer above questions, it's a mustang V. No, I don't hook up pedals to the expression pedal. I as well first thought was that something in the line was causing trouble. I'm constantly screwing with the order of pedals both in front of the amp and in the loop. So I tried backtracking every configuration. No luck. I tried going otherwise dry. No luck. The pedal always makes noise, even if it's the only thing plugged into the amp, including the guitar!

Eventually I found the problem. It's interference from power. $@!&#* part is, it's power from the amp. Go figure. An amp who's own power supply causes interference with its own accessory. Ain't that a $@!&*? If the pedal is 10+ feet away from the amp, no noise. Get within range of 99% of playing situations and it's crackle city. Damn.


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Post subject: Re: EXP-1 Noise Problem
Posted: Sun Jun 29, 2014 3:00 am
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Quote:
amp who's own power supply causes interference with its own accessory

You say that the pedal's distance from the amp seems to be related to the problem. Apart from distance, what else makes you think it's the power supply, rather than any other sort of interference?

I ask because I typically have my EXP-1 (and MS-4, MS-2) right next to the amp and do not have any noise problems.

Quote:
The pedal always makes noise, even if it's the only thing plugged into the amp, including the guitar!

That's interesting: to confirm I understand you - you have nothing at all plugged into the amp's guitar input, nothing plugged into the fx-loop, nothing plugged into the MS-2 socket, and just the EXP-1 plugged into the MS-4 socket (the EXP-1 is definitely plugged into this socket, yes?). And there is nothing plugged into the aux-in or phones-out sockets. Then you also have speakers plugged into the speaker output on the amp?

In just this configuration, if I understand you correctly, rocking the pedal back and forth creates noise through the speakers? But while the pedal is stationary, there is no noise?

What about if you unplug the speaker cables from the amp, and plug headphones into the amp. Do you hear the noise through the headphones?

The only thing I've ever come across that could be similar to this, is if the EXP-1 cable is too close to audio cables - in your case we'd have to be talking about the cables from the amp head to your speaker cab.

If you're quite sure the EXP-1 cable is nowhere near the speaker cables, it might be worth trying a different cable for the EXP-1. The standard cable it comes with isn't shielded; try using a normal, shielded guitar cable - not to stop noise getting in, but to stop it getting out!

If none of that helps, you may have a faulty EXP-1. But there isn't a fundamental flaw with the amp, power supply, etc - the EXP-1 definitely works fine with the amp, usually.


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Post subject: Re: EXP-1 Noise Problem
Posted: Sun Jun 29, 2014 7:21 pm
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I haven't read the thread, but make sure you're NOT using a guitar cord. You should be using a speaker type unshielded cable.


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Post subject: Re: EXP-1 Noise Problem
Posted: Mon Jun 30, 2014 12:24 am
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Quote:
make sure you're NOT using a guitar cord. You should be using a speaker type unshielded cable

I am curious why you say this? I can find no information or evidence to support this, so if there is a tangible factual reason for it that I have missed, please explain.

(Usually the only reason for needing a 'speaker-type' cable is to carry higher voltage/current, which doesn't apply for the EXP-1; such cables are unshielded only because the higher current doesn't need to be shielded and it keeps costs down, there's no audio/signal advantage to having it unshielded).


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