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Post subject: EXP-1
Posted: Sun Oct 27, 2013 6:30 pm
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My EXP-1 always produces a hum when moved up and down, in motion and stops as soon as no movement or motion is occuring, is this normal? It occurs if it is activated by the switch or not activated by the switch.


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Post subject: Re: EXP-1
Posted: Mon Oct 28, 2013 1:37 am
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Do you mean there is a hum coming from the pedal itself, or that you hear a hum through the amp when you move the pedal?

If the latter, then make sure the pedal's cable is kept well away from the guitar cable. The same applies to the MS-2 and MS-4 footswitch cables too. All of these can induce noise onto the guitar cable.


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Post subject: Re: EXP-1
Posted: Mon Oct 28, 2013 4:57 am
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EMI. Most solid state amps don't have the input grid of tube amps, and can be very susceptible to electromagnetic noise picked up by the guitar and guitar cable. Put a ferrite bead on the patch cable from the guitar where it enters the amp. A clamp-on one should be good enough - they cost a couple of bucks and takes about two seconds to install.
There are also plug-in-plugs with a female TS in one end and male in the other, and shielding built in to the plug. Convenient, but you pay ten times what it's worth.

If the noise is bad enough to survive a clamp-on ferrite bead, you may need to warp the cable several loops around a bigger ferrite cord. Note that that will attenuate the signal too, so you may have to crank the volume up a tiny bit to compensate.

Also, if you power multiple pedals through a daisy chain, filter the power between each and every unit. A noise suppressor like Hum-X will only work for hum coming down the mains, not generated after the fact between devices. So you may want something like this.


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Post subject: Re: EXP-1
Posted: Mon Oct 28, 2013 9:40 am
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this pedal can only be plugged into the 4-button footswitch input? is that true?

if that is true, it is not a pedal at all but is a toy.

it's ridiculous if we have to choose between using 4-button footswitch and exp pedal. need to be able to use both at same time


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Post subject: Re: EXP-1
Posted: Mon Oct 28, 2013 10:53 am
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Her Wanna wrote:
it's ridiculous if we have to choose between using 4-button footswitch and exp pedal. need to be able to use both at same time


You could've clicked the first link in a Google search and had that answer without creating confusion in this thread.

http://www.fender.com/en-CA/support/art ... ion-pedal/

Quote:
The EXP-1 connects directly to the MS-4, 4 button footswitch input on the Mustang III, IV, V, and to the EXP-1/MS-4 input on the Mustang Floor. It also contains a pass-through jack that allows you to daisy chain the MS-4, 4 button footswitch. This aids in reducing the clutter normally associated with multiple pedals in your setup.



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Post subject: Re: EXP-1
Posted: Tue Oct 29, 2013 1:28 am
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Quote:
it is not a pedal at all but is a toy

I disagree with this (and I don't even see the rationale for saying it?).

The EXP-1 is definitely a pedal. It differs from conventional pedals in that it transmits a control signal to the amp, that is then used by the amp to vary the sound/effect, rather than passing the audio directly through the pedal and having the pedal process the audio internally.

The EXP-1's approach is in many ways better, as there are fewer components / cables in the audio path, so fewer places to introduce noise and interference.

As adiabatic notes, it is well-documented on the Fender support site, in the product documentation, and multiple times in this forum, that the EXP-1 and MS-4 can be used together (and the MS-2 as well).


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Post subject: Re: EXP-1
Posted: Tue Oct 29, 2013 6:39 am
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scott-uk, I've come to the conclusion at this point that Mr. Wanna tends to 'troll' a little bit.

Putting comments like that out there and then enjoying the backlash.

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Post subject: Re: EXP-1
Posted: Tue Oct 29, 2013 8:57 am
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Hey treewiz,

I have the same problem using the EXP-1 with my Mustang Floor on every amp and in every location that I've tried, it's only the EXP-1 that causes the hum while the on-board pedal is quiet. I believe it's a ground loop problem, I eliminated the hum by using a 2 wire to 3 wire adapter on the amp (AC plug that removes the ground pin). It eliminates the hum if I use the adapter on the M/F until I attach it to my PC via the USB cable then the amp squeals, but all is quiet if the adapter is on the amp. I understand it's not the safest thing to do but nothing else I've tried works and for under a dollar I'll take my chances. I tried using several ferrite beads on all the cables but they didn't make any difference.


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Post subject: Re: EXP-1
Posted: Tue Oct 29, 2013 9:04 am
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lnowlin, if possible, try plugging the amp into an Uninterrupted Power Supply (UPS). It would be safer and should eliminate the 'hum'.

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Post subject: Re: EXP-1
Posted: Tue Oct 29, 2013 9:12 am
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strings10927 wrote:
lnowlin, if possible, try plugging the amp into an Uninterrupted Power Supply (UPS). It would be safer and should eliminate the 'hum'.


Hey strings10927,

Everything is plugged into the same UPS whenever I'm home. Still makes the noise without the adapter.


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Post subject: Re: EXP-1
Posted: Tue Oct 29, 2013 9:15 am
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You don't mean a standard 'power strip' or 'surge protector' right? I mean a battery backup....

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Post subject: Re: EXP-1
Posted: Tue Oct 29, 2013 9:22 am
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strings10927 wrote:
You don't mean a standard 'power strip' or 'surge protector' right? I mean a battery backup....


I'm a computer tech, I know what you mean.


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Post subject: Re: EXP-1
Posted: Tue Oct 29, 2013 9:43 am
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ok can't assume

did you try exchanging that pedal?

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Post subject: Re: EXP-1
Posted: Tue Oct 29, 2013 9:58 am
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lnowlin wrote:
strings10927 wrote:
lnowlin, if possible, try plugging the amp into an Uninterrupted Power Supply (UPS). It would be safer and should eliminate the 'hum'.


Hey strings10927,

Everything is plugged into the same UPS whenever I'm home. Still makes the noise without the adapter.


Most UPSes don't have separate filtered outputs, but lump them all together. Which means that ground hum generated after your UPS goes from one device to another.
Try plugging one device to the UPS, and the other NOT to the UPS (nor anything that comes from the UPS).

Alternatively, a couple of Hum-X plugs may work wonders for ground loop hums. While pricey, they're far cheaper than multiple UPSes, or a musician's UPS that actually has a filter on each output.


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Post subject: Re: EXP-1
Posted: Tue Oct 29, 2013 10:27 am
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The ground adapter works for me, can't see any good reason to spend more money on a problem that I have a workable solution for. Operating the amp w/o a ground isn't ideal but that's the way everything electric in a home was for decades until someone came up with a better idea.

I just wanted to tell OP the work around that I found after doing a bit of research. I found a satisfactory solution the the same problem he inquired about. This post was for his issue, not mine.


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