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03-05-2013, 09:50 AM
| | | | EMG wiring question?
I have a set of EMG active pups for a P bass - is there any reason why I couldn't wire them with tone control only??? In other words, without a volume pot??? I don't see any reason why not, but just thought I'd ask... I pretty much run my volume wide open anyways, but want to be able to roll off treble as needed - and can always hit my amp's mute button or use it's volume control as needed...
I'm thinking I can run the signal wire straight to the tone pot and on to the jack from there, right???
- georgstrings |
03-05-2013, 09:54 AM
|  | Supporting Member | | Join Date: Jul 2011 Location: Nanaimo, BC, Canada | | I did this as a test with my active EMG 40J pickups. It works. 
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03-05-2013, 10:34 AM
| | | Quote:
Originally Posted by awilkie84  I did this as a test with my active EMG 40J pickups. It works. | Yeah, I didn't see why it wouldn't - just thought I'd ask, thanks...
- georgestrings |
03-05-2013, 11:13 AM
| | Registered User | | Join Date: Jun 2008 Location: Close to Los Angeles, CA | | | It may be a bit bright with no load from a pot. Run a resistor parallel to the output if that is the case. |
03-05-2013, 03:21 PM
| | | Quote:
Originally Posted by line6man It may be a bit bright with no load from a pot. Run a resistor parallel to the output if that is the case. | As an example - since it's supposed to have a 25k pot, am I correct to assume I'd want a 25k resister from signal to ground???
- georgestrings |
03-05-2013, 03:40 PM
| | Registered User | | Join Date: Jun 2008 Location: Close to Los Angeles, CA | | Quote:
Originally Posted by georgestrings As an example - since it's supposed to have a 25k pot, am I correct to assume I'd want a 25k resister from signal to ground???
- georgestrings | Yes. |
03-05-2013, 03:42 PM
| | | Quote:
Originally Posted by line6man Yes. | Thanks...
- georgestrings |
03-08-2013, 06:39 AM
| | | Quote:
Originally Posted by line6man It may be a bit bright with no load from a pot. Run a resistor parallel to the output if that is the case. | OK, I've got another question - if this circuit is supposed to have (2) 25k pots for V &T, wouldn't using a 50k pot for tone only, simulate the same thing as having both 25k pots with V wide open??? I'm guessing it would, but want confirmation...
- georgestrings |
03-08-2013, 08:05 AM
| | Registered User | | Join Date: Dec 2012 Location: Mystic CT | | | I have an SB-2 ..and with the MFD pickups there is a huge range of tonal character change with volume... so suggest you make sure you are not missing out on some tones you may need!
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03-08-2013, 09:38 AM
| | | Quote:
Originally Posted by mystic38 I have an SB-2 ..and with the MFD pickups there is a huge range of tonal character change with volume... so suggest you make sure you are not missing out on some tones you may need! | I appreciate the suggestion, but I always run my volume wide open on single pickup basses, anyways - but need to be able to roll off some treble with this particular bass for certain circumstances...
- georgestrings |
03-08-2013, 11:09 AM
| | Registered User | | Join Date: Jun 2008 Location: Close to Los Angeles, CA | | Quote:
Originally Posted by georgestrings OK, I've got another question - if this circuit is supposed to have (2) 25k pots for V &T, wouldn't using a 50k pot for tone only, simulate the same thing as having both 25k pots with V wide open??? I'm guessing it would, but want confirmation...
- georgestrings | First off, parallel resistances follow the formula R Total=1/([1/R 1]+[1/R 2]+...[1/R n]), so two 25k pots would make 12.5k. But second, the load of a tone pot decreases as frequency decreases. So it will be 12.5k to high frequencies, increasing to 25k at low frequencies. |
03-08-2013, 01:01 PM
| | | Quote:
Originally Posted by line6man First off, parallel resistances follow the formula RTotal=1/([1/R1]+[1/R2]+...[1/Rn]), so two 25k pots would make 12.5k. But second, the load of a tone pot decreases as frequency decreases. So it will be 12.5k to high frequencies, increasing to 25k at low frequencies. | PM sent...
- georgestrings |
03-08-2013, 01:11 PM
|  | Registered User | | Join Date: Oct 2002 Location: London, Ontario | | | I doubt you will notice any significant change using just tone with EMGs - I used to use just Volume and it sounded pretty much the same as with a tone full up.
Volume change doesn't affect active EMGs tone-wise like it does passive pickups (not audibly at least, which is all that matters), so don't worry about not having Volume tone-change-wise.
At the end of the day, try it and see if you like it. I wouldn't bother with resistors or any of that stuff.
J
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