obp-3 issue

Discussion in 'Pickups & Electronics [BG]' started by bassjamn, Mar 20, 2005.

  1. bassjamn


    Jan 4, 2002
    San Francisco
    Well i just got my new Zon Custom 5'r (Yay! :bassist: )

    But this is a pre-amp question:

    It has a obp-3 installed, one thing i noticed right away is the output level is far, lower then my other Zon(with a bart ntbt pre-amp)

    For you obp-3 users Is this normal? Also maybe i misread the aguilar website but i guess depending on the wiring it could run off 9 or 18v - With a +6db increase if run at 18volts.
    I tested running off 1 battery, no dice...
  2. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    Well, Bart preamps have a gain trimmer to let you boost the signal from the pickups. Aguilar preamps don't have that, so an aguilar preamp in active mode with eq flat will sound same volume as in passive mode.

    It can run off of 9v or 18v, but if it's wired for 18v you need to have two batteries in there.
  3. bassjamn


    Jan 4, 2002
    San Francisco
    Ahh thanks, I was thinking there would be a trimmer within the black aguilar box. But i can do with just adjusting amp gain, eq knobs.
  4. 5stringDNA


    Oct 10, 2002
    Englewood, CO
    Yah.. I have never looked into the volume issue, but OBP-3 has almost the same volume passive as it does flat in active mode,a dn I run 18v setup. There isn't anythign wrong with it.