Fender Studio Bass

Model/Circuit Number: Studio Bass
Years of Production: 1977 – 1980
Configuration: Combo
Controls: Black forward facing w/ white labels
Knobs: Black skirted w/ chrome center, numbered 1 – 10 (EQ knobs numberd -5 to +5)

  • Front: Power Sw, Standby Sw, Pilot Lamp – In, In, Vol, Treb, Mid, Bass, Presence – 1850 Hz, 1000 Hz, 390 Hz, 180 Hz, 80 Hz – Output
  • Rear: Speaker Jack, ? Jack, Hum Balance Adj, ? Jack, Output Tubes Matching Adj, Fuse (3A)


Covering Material

  • Tolex/Tweed: Black Tolex
  • Grill Cloth: Black sparkle grille cloth

Logo: Grille mounted, raised, chrome & black script “Fender” w/o tail

  • Speakers/Load: 1 x 15″ / 8 ohms
  • Speaker Model: Electro Voice

Effects: Active EQ
Watts: 200 Watts

  • Pre amp: 2 x 7025
  • Power: 6 x 6L6GC

Bias: Fixed bias
Rectifier: Solid State
Phase Inverter: 2 x 7025 12AT7 (Long Tailed w/ Cathode Follower)
Other: Active EQ: 12AU7

4 thoughts on “Fender Studio Bass

  • November 18, 2011 at 6:47 pm

    This was never a production item, but there  have been many of these “chopped” heads custom made from the Studio Bass combo. Shares basic schematic design as the Super Twin/Super Twin Reverb. The Studio Bass has a differently tuned EQ section, no bright switch, no distortion/boost, and no reverb. All other sections are the same.

  • January 7, 2012 at 7:10 pm

    Thanks for sharing this info RobbieNuke…. I have the un”chopped” version and think I will keep it just the way it is! Oh, I do have fresh matched tubes though.. pre-amp tubes however are original. They seam pretty darn RARE!  Not many to be found… not much information online or anywhere.  Not a great pic (cell – phone) but this is what mine looks like…

  • February 3, 2017 at 10:42 am

    Please let me know dimension of Fender Studio Bass Head only ( not combo )

  • September 1, 2021 at 1:06 pm

    Cabinet is cut to be 9″ H (not including the rubber feet). The W x D are same as stock combo. Presence knob is not a true presence control… just another EQ band! Go figure that one out!


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