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250k or 500k pots for jazz control plate build?

Discussion in 'Pickups & Electronics [BG]' started by soaf, Dec 19, 2013.

  1. soaf

    soaf

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    What is the difference? What should I use and why? Thanks!
  2. line6man

    line6man

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    Higher values place less load on the pickups, and thus, give less attenuation of output and higher frequencies. Conversely, lower values place a greater load on the pickups, causing more attenuation of output and high frequency content.

    No one can just blindly suggest a value. Pot values are a highly personal preference, and often, people take into account the voicing of their pickups when choosing.
  3. soaf

    soaf

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    So if I understand this correctly, full on to full off using the volume control will have less attenuation if I use 500k pots. Will my high end be decreased, or just the attenuation of the high end?
  4. line6man

    line6man

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    I'm not sure what you're asking.
  5. soaf

    soaf

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    Will my high frequencies be the same with the volume wide open whether I use 250k or 500k pots?
  6. line6man

    line6man

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    No. The full resistance of the pot is applied parallel to the signal path at the full volume setting. A 250k pot will be darker than a 500k pot, because the path to ground is more direct with the lower resistance than with the higher resistance.
  7. soaf

    soaf

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    I don't like 'dark', so I guess 500k is the way to go for me, I will just have less attenuation to get used to. I tend to always run full volume so the decrease in attenuation shouldn't bother me. You really know your stuff in this dept!
  8. tedsalt

    tedsalt Supporting Member

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    darker ~= warmer

    lighter ~= brighter, more trebly

    I would find out what your pup mfr recommends, and go from there
  9. RobbieK

    RobbieK

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    I like 250k's for Jazz and p's. The 500k's are brighter in tone if you run them flat out, but as soon as you turn the vol down a bit they get more muffled than 250K's. My basses are mostly active these days, but back when I played passive basses, I would run a little treble bleed circuit. I used to get theatre and orchestra work where you are tweaking your volume all night, and the tone shift was pretty annoying...
  10. walterw

    walterw Supportive Fender Gold Supporting Member

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    if you go with 500k for more brightness, you'll definitely want linear volumes; 500ks drop off faster than 250ks, so 500k audio volumes would drop off really fast from "10", making it hard to get a smooth sweep. (keep the tone audio taper.)

    i like the added attack and clarity of 500ks on fender bass pickups, but it's not for everybody.

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