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Old 01-22-2016, 07:04 AM   #1
JaymzDead
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The search for the missing mids

I have an odd problem with a guitar that I have recently modified, I wonder if anyone here has any ideas please?

First the story: I won an ESP LTD Viper 50 on eBay about a year ago. The guitar already had a Seymour Duncan Dimebucker installed in the bridge. I have never really got on with the sound mix of the stock neck pup with the Dime so at the first opportunity I bid on a SD Jazz neck pup. I won this and at the same time bought an SD Liberator volume pot and then went about installing both in the guitar.

The problem: Since installed the new hardware, the guitar appears to have lost a lot of mid range, even with just the Dimebucker on which is well known to be a trebly pup I cannot get any kind decent mid sound, even when I have the mid setting on my amp on full. Before the guitar used to screech like a banshee when I used pinch harmonics, now I get hardly anything.

I have tried adjusting the pup height but although there are obvious tonal changes it does not bring back much if any mid signal.

Has anyone had similar problems when changing pups?

Thanks in advance.

Last edited by JaymzDead : 01-22-2016 at 11:33 AM.
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Old 01-22-2016, 09:45 AM   #2
metalmingee
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I'd start by triple checking the wiring is all correct then start resoldering everything to fix any bad or cold joints.
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Old 01-22-2016, 02:49 PM   #3
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Do everything metalmingee said first.
Now, you said you replaced the volume pot also. Put the original volume pot back in and see what happens.
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Old 01-22-2016, 03:11 PM   #4
Kevin Saale
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What impedance was the volume pot you remove and what is the impedance of the one you replaced it with? Assuming everything is hooked up right (and that is something you'll want to triple check like the others have said) too low of an impedance on the volume pot can totally kill the sound of the guitar. You'll lose output and the tone will be very dark, that kind of sounds like what you're experiencing. But, again, as the others said a bad solder joint could potentially cause the same kind of issues.
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Old 01-22-2016, 03:42 PM   #5
Arby911
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Quote:
Originally Posted by Kevin Saale
What impedance was the volume pot you remove and what is the impedance of the one you replaced it with? Assuming everything is hooked up right (and that is something you'll want to triple check like the others have said) too low of an impedance on the volume pot can totally kill the sound of the guitar. You'll lose output and the tone will be very dark, that kind of sounds like what you're experiencing. But, again, as the others said a bad solder joint could potentially cause the same kind of issues.


Say what?
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Old 01-22-2016, 03:48 PM   #6
Kevin Saale
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Originally Posted by Arby911
Say what?


I'm assuming you want to elaborate for the benefit of the TS I'm talking about 250k pots, 500k pots, etc. Anything with humbuckers should have at least 500k pots, and I know some folks actually prefer 1meg pots.
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Old 01-22-2016, 04:04 PM   #7
Arby911
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Quote:
Originally Posted by Kevin Saale
I'm assuming you want to elaborate for the benefit of the TS I'm talking about 250k pots, 500k pots, etc. Anything with humbuckers should have at least 500k pots, and I know some folks actually prefer 1meg pots.


Resistance, not impedance...
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Old 01-22-2016, 04:10 PM   #8
JaymzDead
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Quote:
Originally Posted by Kevin Saale
What impedance was the volume pot you remove and what is the impedance of the one you replaced it with? Assuming everything is hooked up right (and that is something you'll want to triple check like the others have said) too low of an impedance on the volume pot can totally kill the sound of the guitar. You'll lose output and the tone will be very dark, that kind of sounds like what you're experiencing. But, again, as the others said a bad solder joint could potentially cause the same kind of issues.


Both are 500k
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Old 01-22-2016, 04:12 PM   #9
JaymzDead
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Thanks for the responses everyone. I think I will try and rewire, I also have a new 3 way switch in my parts store so I think I'll try replacing the old crappy plastic LTD one as well
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Old 01-22-2016, 04:15 PM   #10
Kevin Saale
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Originally Posted by Arby911
Resistance, not impedance...


Err yeah.
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Old 01-22-2016, 05:02 PM   #11
Arby911
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Err yeah.


I honestly thought I was missing something there, and I was confused as hell!
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Old 01-22-2016, 05:08 PM   #12
Kevin Saale
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Originally Posted by Arby911
I honestly thought I was missing something there, and I was confused as hell!


Yeah, those two words and concepts are very closely linked. As you pointed out though they aren't the same thing, and it's good to realize the difference. I didn't even realize I was wrong until you actually typed the word resistance.
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