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Clean signal boost???

Discussion in 'Amps [BG]' started by passive pickup, Nov 26, 2012.


  1. passive pickup

    passive pickup

    Joined:
    Dec 11, 2010
    Location:
    Northants
    Plugging my bass (9v emg pups) straight into my power amp (Crown xti1000) gives me exactly the tone i want, but not quite enough signal to push the power amp to war volume. I much prefer this tone to using my Madamp tube pre, or my Ibanez head.

    Is there a simple (cheap!) bit of kit that can boost the guitar's signal to the amp without significantly colouring the tone? Maybe some sort of active DI box or such like?

    A high-end preamp is financially out of the question, and tbh i don't want anything but a slightly stronger signal. I've been trying to get to grips with voltage and impedance matching of inputs/outputs but now i'm more confused than ever...

    Any suggestions would be greatly appreciated!
     
  2. dincz

    dincz

    Joined:
    Sep 25, 2010
    Location:
    Czech Republic
    Art Cleanbox Pro?
     
  3. BassmanPaul

    BassmanPaul Gold Supporting Member

    Joined:
    Aug 25, 2007
    Location:
    Toronto Ontario Canada
    Even one of the TubeMP line will do the job.
     
  4. Johnny Crab

    Johnny Crab ACME,QSC,Fame/Hondo/Greco user & BOSE Abuser

    Joined:
    Feb 11, 2004
    Location:
    South Texas
    Experiement with the MXR 10 band EQ pedal if you can. It will take bass-level to line level on the input and output whatever you want it too without a lot of noise(IMO). This will also allow you the option of some signal shaping later if you want it.
     
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  6. Floridabwoy

    Floridabwoy

    Joined:
    Sep 18, 2008
    Location:
    Jacksonville, Fl
    BBE Boosta Grande... I got one for $40 on Amazon.
     
  7. ThisBass

    ThisBass

    Joined:
    Aug 29, 2012
    Location:
    Germany
    Changing output resistance of the bass electronic from 10k to 1k increases the level to appro +6dB.
     
  8. CnB77

    CnB77

    Joined:
    Jan 7, 2011
    Location:
    NJ
    You can pretty easily build a transparent boost pedal if you want to go the diy route.
    I believe David from SGD has recommended the Alembic Stratoblaster for just the purpose you mention. I think it can have 22dB of gain.
     
  9. SirMjac28

    SirMjac28 Patiently Waiting For The Next British Invasion Gold Supporting Member

    Joined:
    Aug 25, 2010
    Location:
    The Great Midwest
    +1 they really work well and are very cheap used.
     
  10. CnB77

    CnB77

    Joined:
    Jan 7, 2011
    Location:
    NJ
    I feel like that might color the tone too much though
     
  11. morgansterne

    morgansterne

    Joined:
    Oct 25, 2011
    Location:
    Cleveland Ohio
    please bear in mind that plugging your bass straight into a power amp is doing it wrong. I'm no tech guru but there's impedance and level mismatching going on. Your power amp wants to see a line level signal and adding a (guitar level) pedal to the signal chain won't fix that.
    A DI (use XLR out) or preamp is in order for you.
     
  12. RickenBoogie

    RickenBoogie

    Joined:
    Jul 22, 2007
    Location:
    Dallas, TX
    +1 what you need is a proper preamp.
     
  13. BeSharp

    BeSharp

    Joined:
    May 17, 2011
    Location:
    Annapolis, MD
    I used to use a Seymour Duncan pickup booster with my vintage P Bass. They're all over eBay for about $50. True Bypass. Built like a tank. Definitely did exactly what you're looking to do.
     
  14. CL400Peavey

    CL400Peavey Supporting Member

    Joined:
    Nov 7, 2011
    Location:
    Grand Rapids Michigan
    They are like $35 bucks new. You would be amazed at how clean they are, and will have all the boost you need to drive an amp.
     
  15. passive pickup

    passive pickup

    Joined:
    Dec 11, 2010
    Location:
    Northants
    Thanks for all the suggestions and advice, that's a great help! I'm not sure which way to go at the moment, i shall look into all of them. The Art mp sounds like the right thing, i'm just hesitant because i already have a tube pre. Having said that, for the cost there's little harm in trying it. Maybe because it's designed for mic rather than bass-specific it may be cleaner than what i have.
    If i understand correctly, whatever i go for needs to accept a strong instrument level and output around 22dbu without colouring or distorting. That makes me think one of the suggested di or boost pedals may be the way to go.
     
  16. Arjank

    Arjank

    Joined:
    Oct 9, 2007
    Location:
    Above Amsterdam
    Years ago (+10) I used such an ART TubeMP for pre-amping my bass. It works well but IMO it does color the sound. Though the unit sounds warm it robs the signal a lot of detail....
    Maybe when upgraded with a nice "hifi" kinda tube like a NOS Philips 5771 it may sound good.
     
  17. arai

    arai

    Joined:
    Jul 16, 2007
    Fender>Ampeg>fEarful
     
  18. dincz

    dincz

    Joined:
    Sep 25, 2010
    Location:
    Czech Republic
    Just a thought. Were you using a passive bass? Could it have been an impedance problem - i.e. the Art's relatively low impedance inputs loading your pickups?
     
  19. CL400Peavey

    CL400Peavey Supporting Member

    Joined:
    Nov 7, 2011
    Location:
    Grand Rapids Michigan
    Thats a pretty good signal chain. When I do haul out a 4 banger, I am always amazed at how clean my Jazz into my PF-500 and '66 can be.
     
  20. Arjank

    Arjank

    Joined:
    Oct 9, 2007
    Location:
    Above Amsterdam
    Nope, EMG pups, 18volts.
     
  21. two fingers

    two fingers You tahkin 'uh me? Yeah, you. You tahkin 'uh me? Supporting Member

    Joined:
    Feb 7, 2005
    Location:
    Eastern NC USA
    I didn't know the values but changing the resistor on the bass was my first thought as well. It's your bass only more.
     

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