Is it possible to have just ONE active tone control?

Discussion in 'Pickups & Electronics [BG]' started by Hopper, Feb 4, 2013.


  1. Hopper

    Hopper

    Joined:
    Sep 24, 2008
    Location:
    London
    I'm assuming the answer's yes... but can you buy a single active treble circuit/knob for instance?

    The reason I'm asking is I hardly use bass and mid controls and only have use for a treble control occasionally when I'm playing through a muddy speaker or a dull PA and I can't see the point in having loads of annoying knobs on the bass.
     
  2. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    Just use fixed resistors in place of pots for the controls you don't want.
     
  3. Hopper

    Hopper

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    Sep 24, 2008
    Location:
    London
    I'm after an active treble control - you know, something you can buy and install.
     
  4. ctmullins

    ctmullins Registered thumper Supporting Member

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    Location:
    MS Gulf Coast
    Buy a normal two-band preamp. Set the bass control where you like it, stuff it into the cavity, and forget about it.
     
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  6. Hopper

    Hopper

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    Well that's one solution! lol
     
  7. Crater

    Crater

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    Oct 12, 2011
    Location:
    Dallas, TX
    Here's your options for a "one knob" tone control.
    1) What ctmullins suggested.
    2) EMG's "EXB" preamp. Not a treble control, but a single knob "slap contour" control - it boosts both bass and treble as it's turned up.
    3) EMG's "SPC" preamp, it's intended for guitar, it's a treble booster
    4) Some other on-board treble/mid booster preamp, like the Guitarfetish MODBOARDS.

    I still think #1 is your best choice. Another alternative is an outboard EQ pedal.
     
  8. eddododo

    eddododo Supporting Member

    Joined:
    Apr 7, 2010
    For the sake of clarity, I think line6man and ctmullins are making the same suggestion..

    You could also : get a 2band and set it up pushpull treble/bass

    Or use a stompbox style one-knob-tone (but dont do this)
     
  9. ctmullins

    ctmullins Registered thumper Supporting Member

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    Absolutely. L6M is right about everything, so I always like to parrot what he says. Makes me appear smart. ;)

    Would that work? When you pushed or pulled the knob, wouldn't that disengage the pot from the other circuit?

    I never used one, but I read about the old Raven Labs P-Bass preamp that used one and only one knob. Twist it clockwise and it boosted treble while slightly reducing bass. Twist it counter-clockwise and it boosted bass while slightly reducing treble. I loved the idea of this, and was going to try and implement it using a regular two-band and a double-gang pot, but I could never convince myself that concentric knobs weren't a better idea...
     
  10. Crater

    Crater

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    Oct 12, 2011
    Location:
    Dallas, TX
    No, a push-pull pot won't work.... A push-pull pot combines a pot with a switch; it doesn't replace two pots.

    The EMG "BTC" preamp has both the treble and bass controls on a STACKED pot. This way you can control bass and treble independently, and not have to drill an extra hole in your bass.

    [​IMG] (image borrowed from Best Bass Gear dot com)
     
  11. eddododo

    eddododo Supporting Member

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    Apr 7, 2010
    I should've been more specific but I was doing this from work..

    the reason I suggested the push pull was so that if he buys a twoband, he could at least have the OPTION of utilizing the other band- leaves the interface tidy and simple, and gives you the trouble control you wanted in the bass control you might find useful

    although at the same time having a push pull for 2 active circuits may just be asking for a lot of 'popping'
     
  12. eddododo

    eddododo Supporting Member

    Joined:
    Apr 7, 2010
    I was also going to suggest a stacked setup, as mentioned just above me.. I figured if the goal was less knobs I wouldn't put it out there; I had forgotten about those BTC .. Really convenient to have the circuit attached to the pot



    aside from all of that, I might breadboard a couple of dedicated treble boost circuits when I get home, either as a real solution for you or just to amuse myself..

    keep you posted
     
  13. Joedog

    Joedog

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    Location:
    Pensacola FL

    I don't see the need to remuddle a bass just cause I don't use a knob or two! It could seriously effect the resale value as well. Just cause they are there doesn't mean you have to use them! Or are you building a new bass from scratch??

    I wish the stuff in my life that really annoys me was as trivial as a knob I don't use!!!!!!! I envy you!
     
  14. Steve Dallman

    Steve Dallman Supporting Member

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    Mar 5, 2006
    Location:
    East Central Wisconsin
    I've built quite a few preamps over the years. I've done a single knob tone, using a baxandall circuit and a dual pot with the bass and treble wired opposite of each other. The Ovation solid body Deacon guitar had this type of tone. I've seen schemes where a Fender tone stack was used, with the bass and midrange being preset with resistors, and the treble being the tone pot.

    I would simply buy a two band, remove the bass control, and wire it to a trimpot and tuck it inside.
     
  15. bassmeknik

    bassmeknik

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    Fair Haven, MI

    +1 nice idea, this way you could tweak the bass control if needed by opening the cavity, and it keeps the overall package very small...
     
  16. Hopper

    Hopper

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    Sep 24, 2008
    Location:
    London

    Yep, I think that's the best solution!
     
  17. eddododo

    eddododo Supporting Member

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  18. FunkMetalBass

    FunkMetalBass

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    Endorsing Artist: J.C. Basses
  19. joelb79

    joelb79 Supporting Member

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    Lansing, Michigan
    With a BTC, if you put just a regular knob on the top you hide the bass control.
     

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