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How many ohms is a black faced fender bassman

Discussion in 'Amps and Cabs [BG]' started by Chef, Apr 5, 2005.


  1. Chef

    Chef Moderator Staff Member Supporting Member

    May 23, 2004
    Columbia MO
    Staff Reviewer; Bass Gear Magazine
    Subject line says it all...the rear face plate says nothing:)
    Just "speaker out" and "extension speaker out."
    It's '66, I think....
    It'd be real nice to know how many ohms each one wants to see...thanks!
     
  2. billfitzmaurice

    billfitzmaurice Commercial User

    Sep 15, 2004
    New Hampshire
    Owner, Bill Fitzmaurice Loudspeaker Design
    50, but that amp had a lot of compression when pushed hard, so compared to a current SS amp it would be roughly the equivalent of 200 watts. That also is an 8 ohm rating, and it will push into 4 no problem, even 2 if you don't go overboard with the power. It may be older than that; my '66 said '50 watts' on the rear panel. Swap out the B+ caps for modern higher values and the sound will clean up appreciably.
     
  3. Chef

    Chef Moderator Staff Member Supporting Member

    May 23, 2004
    Columbia MO
    Staff Reviewer; Bass Gear Magazine
    That's the part I needed right there:) I had the amp sorta rebuilt with modern parts as above, and replaced the 12ax7's with 12 at7's, and it sounds pretty dang good:) I just wanted to make sure what kind of load it wanted....Thanks!

    By the way Bill, real interesting homepage you have there:)
     
  4. Passinwind

    Passinwind I Know Nothing Supporting Member

    Anytime you're wondering about old Fender tube amps, start here: Fender Field Guide

    Have fun!