Fender Bassman 20

Schematic(s) bassman20.pdf
Production: ,

Model/Circuit Number:
Years of Production:
1982 – 1983
Era: Rivera
Configuration: Combo
Controls: Black forward facing w/ white labels
Knobs: Black skirted w/ chrome center, numbered 1 – 10

  • Front: In, Vol, Treb, Mid, Bass – Power Sw, Pilot Lamp
  • Rear:



Grill Cloth:

Logo: Grill mounted, raised, chrome & black, script

Watts: 18 watts

  • Pre amp: 2 x 7025
  • Power: 2 6V6
  • Bias: Fixed
  • Rectifier: Solid State

Less than 500 of the amps made from 1982-1983

16 Responses to “Fender Bassman 20”

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  1. Comment by Andrew Waugh — November 25, 2011 at 5:25 am   Reply

    I’ve been researching the Rivera-era range of amps since 2004 and it looks like they made around three thousand Bassman 20s. The confusion arises when people misread the tables at the back of the excellent Teagle and Sprung book – it’s easy to mistake the ‘original price in dollars’ column for ‘how many made’. My website (info only, non-commercial)


  2. Comment by SemiDriven — June 9, 2013 at 6:31 pm   Reply

    18 watts??
    More like 70 watts.

    • Comment by Wherez Waldo — September 10, 2013 at 12:18 pm   Reply

      70 watts? no way not with just 2 6v6s in the power section.

      • Comment by SemiDriven — September 10, 2013 at 5:11 pm   Reply

        Faceplate has the following info:

        120v 60Hz ~
        0.7 A 70 watts

        • Comment by Wherez Waldo — October 7, 2013 at 6:13 am   Reply

          amps are discussed in power section output dissipation. 70 watts is the draw at the wall power.
          any dual 6v6 amps will dissipate 12 to 20 watts depending on the circuit.
          Hence the “20” in the name.

          • Comment by SemiDriven — October 7, 2013 at 5:40 pm  

            I was in error. Thanks for the info! Sure sounds bigger than a 20-watt amp.

  3. Comment by James Baydarian — May 17, 2014 at 7:53 pm   Reply

    Hey- My Bassman 20 was featured in Premier Guitar’s “Trash or Treasure” column(Feb/2014) & Zach’s (who works for “Guitar Bluebook”) research found that under 600 of these were made.@ no time did these sell for $600. The simple circuitry in these makes a great amp for recording bass & guitar. I paid $125 for mine in 1985. -Thanks-JB

    • Comment by Andrew WaughDecember 30, 2015 at 1:42 pm   Reply

      James, no disrespect to Zach but I believe he’s accidentally passing on an internet myth. However if he’s actually done research I’d be pleased to exchange info with him! best wishes…

      • Comment by Andrew WaughDecember 30, 2015 at 1:52 pm   Reply

        actually I’ve just looked back at Zach’s article and he says “I’ve seen reports of around 500 or so being produced.” No mention of research, so I’ll stick with my findings at least for now. Around 2500 made.

        • Comment by James Baydarian — June 15, 2016 at 10:48 pm   Reply

          Andrew — Was just looking again @ our conversation & while you disagree w/#’s this rarity(or not) has never had a correlation to worth — as Zach clearly states. It’s worth more than the $125 I paid for it 30 years ago it’s relative low worth has never been something anyone disputed.It is a great guitar/recording/studio amp that I use w/an SRC Crossover — JB

  4. Comment by Tom — December 2, 2015 at 5:38 pm   Reply

    Anyone know what the value of these amps are now?

    • Comment by James Baydarian — June 15, 2016 at 10:53 pm   Reply

      Tom — I paid $125 for mine in 1985 & it’s gone up some due to it’s worth as a studio amp – low watts & simple circuitry & it’s use as a guitar or bass amp. The highest $’s I’ve seen were $550 — I haven’t seen 1 for sale in a long time tho — Thanks –JB

  5. Comment by StratopastorJuly 6, 2016 at 4:19 pm   Reply

    James, I thoroughly agree with Zach and yourself concerning the amp’s actual worth. I would be pleased to own one no matter how many were made.

  6. Comment by Rich — August 14, 2016 at 7:54 pm   Reply

    I traded a 2014 epiphone mini 335 style for mine, extremely happy with the trade.

  7. Comment by Mark — March 23, 2017 at 10:51 pm   Reply

    The trouble with the Bassman 20 is the transformers. The output transformer is from a Princeton amp and not up for the task of reproducing bass, in fact the amp purposeful rolls off bottom end to stop early distortion.

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