Question on the Warwick Active Preamp

Discussion in 'Basses [BG]' started by Mario Lewis, Feb 3, 2002.

  1. Mario Lewis

    Mario Lewis

    Jul 6, 2001
    Clinton, MD
    I have a Warwick Thumb 6 Bolt on. It has the function with the volume knob that will make the instrument go "passive" if you pull the volume out. Does that cut off the use of the batteries? So that if I leave the bass plugged in but just pull the knob out, I won't be "draining the battery"??
  2. Angus

    Angus Supporting Member

    Apr 16, 2000
    Palo Alto, CA
    It definitely puts it into passive mode, so the battery is bypassed. I'm not sure whether the battery gets drained in passive mode or not, but it seems like it would be stupid for it to be, and besides, where would the voltage go?

    I assume it won't drain the battery...but how hard is it to unplug?
  3. Mario Lewis

    Mario Lewis

    Jul 6, 2001
    Clinton, MD
    Well, I play mostly in church, and it's a lively Gospel church, where even after the Praise & Worship team is supposed to be fininshed, and before the actual sermon for the morning, the spirit is likely to descend and on the fly, I'm being asked to get up and start playing.

    Unplugging the bass means unplugging the cord from the amp as well. And that is confusion and time wasted to get plugged in on both; whereas, if I was already plugged in, all I'd have to do is put the bass on and go. I'd prefer to do that. That's all. :D
  4. Angus

    Angus Supporting Member

    Apr 16, 2000
    Palo Alto, CA
    You don't have to unplug from the amp, just turn the amp off.
  5. I don't think that changing into the passive mode will cut off the battery. AFAIK only unplugging would do this. There will be still a quiescent current like in a calculator that you didn't turn off.
  6. air_leech


    Sep 1, 2000
    pulling the "passive" knob wont help you.

    the jack is a stereo jack and one leg is connected to the battery. whenever you put the plug in it closes the circuit and thus the battery gets drained.

    look at it as an on/off switch: when the plug is in its on and when its out its off.

    btw the Thumb, I belive, has active pickups so when you pull the knob it only bypasses the preamp and the pickups still need voltage to operate so anyway you look at it you must keep the battery in and the cord out.

    I'm baseing the above on my Streamer LX5's being active-active, you should however e-mail Warwick or dana b. goods and ask if you're pups are active or not, if they are passive you dont need the battery to be full if you play with the preamp bypassed.

    WAKOJACO Guest

    Jul 5, 2000
    Binghamton, NY
    The battery in my Warwick died, and it wouldn't work in active or passive be safe and don't forget that extra 9-volt.
  8. air_leech


    Sep 1, 2000
    if you have a real passive setup (i.e. passive pups a' la' Fortress and Corvette) you can play in bypass mode if the battery died, but you'll need the dead battery to be connected in order to close the circuit (unless MEC went far enough as to make a real passive circuit in addition to the active one which I dont belive the case to be).
  9. jasonbraatz

    jasonbraatz Supporting Member

    Oct 18, 2000
    Walnut Creek, CA
    i had the battery die on my in my old thumb NT once and i could pull it into passive and still use the bass.

  10. I'm pretty sure that it's just an EQ bypass, because the output level is the same between active and "passive" mode.
  11. Phil Smith

    Phil Smith Mr Sumisu 2 U

    May 30, 2000
    Peoples Republic of Brooklyn
    Creator of: iGigBook for Android/iOS
    I have a Warwick Thumb 4 with the 3 band EQ and it takes two 9 volt batteries. With the batteries out of the bass you cannot hear anything UNTIL you pull up on the volume knob i.e. put the bass into passive mode. As for whether or not the battery will still be drained with the chord in and the knob pulled up, only a schematic will know for sure.
  12. bassarch


    Jul 24, 2001
    I have a Fortress-one active 4 string (98)..I take out the battery,pull the volume knob bypass the active mode and there is still that warwick sound..think mEC went far eough :) just wanted to inform. ;)
  13. CS


    Dec 11, 1999
    I often play in church and have had no problems with my Thumb (oe and Alembic pups/preamp) and EB Musicman re batteries and sermons.

    I get a year + from my batteries the Thumb was changed August 2001 and thats my 'church bass'.
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