The Vault
Results 1 to 3 of 3

Thread: Treble bleed on JP6 with piezo

  1. #1

    User Info Menu

    Treble bleed on JP6 with piezo


    As the title says, is this possible? Do I just ground the tone capacitor and then install the treble bleed mod on the volume pot? I'm not good with electronics, so forgive me if I sound stupid. Thanks.

  2. #2

    User Info Menu

    Backing up a bit ... a treble bleed is a work-around to retain higher frequencies that are lost due to the loading effect on the pickups, largely due to the capacitance from your cable.

    With the piezo version of the JP6, you have an on-board preamp that will negate this effect. So simply by using the active output (mono I believe) and selecting magnetic pickups only on the selector switch, you'll have a buffered output from your magnetic pickups that won't lose treble as you turn down the volume.

    If you still want to put something in place for when you use a passive output, you'll can wire up a treble bleed on your volume pot. You'll have to experiment a bit to find resistor/capacitor values that work though- perhaps someone can recommend something.

    Another option to consider is "50's wiring", where you change where the tone pot connects to the volume pot. This results in less treble loss when you reduce the volume, though it changes the interaction of the tone pot somewhat. (I prefer this approach, and have it wired up on most of my guitars.)

  3. #3

    User Info Menu

    As beej said, with a passive guitar circuit if high frequency loss is an issue when turning down the volume, adding a resistor/capacitor combo to the volume pot is the way to go.

    This is my list of the value recommended by the various pickup manufacturers....

    Treble Bleed Mod Round-up |

    Based on my recent circuit simulations I recommened that if you use a 10 ft cable from your guitar to your pedla board or amp, choose the Mojo, DiMarzio, or Suhr values. If you use a 30 ft cable choose one of the versions with 1 nF or 1.2 nf capacitor.

    The DiMarzio treble bleed vlaues are working great for me (560pF capacitor and 300kΩ parallel resistor).

    Note that doing this mod will also change the taper of the volume pot somewhat. Try it and see if suits you.
    Forum Moderator, Guitar Teacher and Guitar Tech, Folder of Underpants, Stubber of Toes.

    Silhouette Special (2005 Buttercream Limited Edition)
    Cutlass HSS (2018 Roasted Special, Ivory White)

    Forum Rules and Useful MM Guitar Info

    Required reading - Forum Decorum

    Ernie Ball Customer Service
    Music Man Customer Service

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Ernie Ball Forums