Silverface Bantam Bass

Model/Circuit Number:  ?
Years of Production:
 1969 – 1971
Era: Silverface
Configuration: Combo
Controls: Silver, forward facing w/ blue labels
Knobs: Black skirted w/ chrome center, numbered 1 – 10Black skirted w/ chrome center, numbered 1 – 10

  • Front: Bass: In, In, Deep Sw, Vol, Treb, Bass – Normal: In, In, Bright Sw, Vol, Treb, Mid, Bass – Pilot Lamp
  • Rear: AC Outlet, Ground Sw, Fuse, Power Sw, Standby Sw, Speaker, Ex Speaker



Grill Cloth:

Logo: Grille mounted, raised, chrome & black script “Fender” w/ tail
Weight: 57 lbs. (25.9 Kg)
Speaker: 1 x 15″/8 ohms

  • Size: 15″
  • Impedance: 8 ohms
  • Model: Yamaha, asymetrical trapezoid shaped w/ white styrofoam cone

Effects: None
Watts: 30 watts

  • Pre amp: 7025 (Normal) 7025 (Vibrato)
  • Power:  2 x 6L6GC
  • Phase Inverter: 12AT7 (long tailed)
  • Bias: Fixed w/ Bias Pot
  • Rectifier: 5U4


13 thoughts on “Silverface Bantam Bass

  • July 7, 2011 at 11:39 pm

    Is this meant to be the “Bantam Bass Amp” ? if so why take away the photo, specifications & schematic ?

    • July 8, 2011 at 12:38 pm

      We currently do not have information for the Bantom Bass Amp. I have been adding blank articles so that a user who does have information about the specific amp may post it. 

      If you can source this information we will give you a 10% discount on a purchase from

  • November 17, 2011 at 3:51 pm

    I have two 1970 BANTAM bass amps and you’ve misspelled it. Best kept secret of all fender amps and I’ve played quite a few. 30 watts tube rectified bliss. One of the fattest fender tones I’ve ever heard from your guitar not bass of course. The first thing you do is to build a new baffle to support two twelve inch speakers and throw out the old yamaha trapizoid thingy. Plug in your favorite les paul or strat and off you go. There kinda rare and only made from 1969 thru 1971.

  • June 13, 2012 at 5:39 pm

    This is a great Fender amp for guitar! 30w, all valve/tube (5U4 rectifier). Very similar to a Super Reverb circuit (AB763) but with no reverb or tremolo. Although only ever a Silverface amp a Blackface Mod makes a HUGE difference. With only one gain stage (no reverb etc) both channels can be used together. There is no master volume so I use a Weber Mass Attenuator  – the amp sounds best with the volume(s) at 6 (loud!) and Bass@2 Mid@3 Treb@6. Fairly strong in the midrange for a Fender amp it starts to sound a like a Marshall with both channels pushed. The Bass channel does not have a great sound on it’s own and breaks up quite early but adds great sustain and a lot more overdrive when combined with the Normal channel. With re-capping, new valves/tubes, a ‘blackface’ mod, a new speaker(s) and a couple of other reversible improvements this is a rare gem.

    • February 20, 2015 at 7:26 pm

      To change speakers to 2×10 – make a whole new baffle, for a 1×12 speaker – make a (1×12) baffle to fit over the original trapezoid speaker hole, use the the existing embedded screws & bolts/nuts.
      Just to add for anyone interested in modifying the ‘bass’ channel, something I did is the “Gerald Weber tweed mod” (google) which converts the ‘bass’ channel to a tweed type channel (early break up & warm tone etc), it works great on it’s own (classic tweed sound) & adds deep ‘tweed’ body when blended with the ‘normal’ channel. After this mod I found using a 5751 (70% gain) valve/tube instead of a 12AX7 (100 % gain) provided more ‘clean’ gain up to about 6 (volume), a 12AX7 breaks up at about 3 (volume). The ‘gerald weber tweed mod’ (bass channel) is a simple, reversible mod which adds huge scope to this great amp.

  • August 21, 2012 at 11:37 pm

    I don’t use this for bass, just for guitar. Great amp. The normal channel I left untouched, the bass channel I modified into a guitar channel, but its sound differs from the normal channel. In my ears the normal channel sound warm with a sparkle. The modified Bass channel has more treble and more attack. I love this amp. Visit my photobucket site to see what I’ve done with the Bantam Bass Amp:

  • December 22, 2012 at 7:41 am

    I too have one of these. I built a new baffle, but went with a ’65 Jensen Concert 15. It is now a great guitar amp and it is very gig worthy! I left mine bone stock except for the speaker change. I would like to find another one and load it with two old Jensen C12Q’s I have and then use em in stereo!

  • August 5, 2013 at 8:43 pm

    I have a 69 fender bantam bass. Best fender amp ive owned other than a 63 fender pro. Im curious to see how much the styrofoam speaker goes for. I put a 15″ eminence kappa pro in it. I wanna sell the styro speaker. If anyone sees my comment and wants the speaker email me at Its got one little dent on the cone about half size of a penny and still works really good

  • August 3, 2014 at 7:04 am

    how do you change speakers to 2 x 10″ or 12″ (celestion maybe)?

  • January 31, 2016 at 4:53 pm

    where can i find parts or refurbish kits for a bantam bass silver face?

  • December 28, 2016 at 4:03 pm

    I have one of these, great amp. I sold the cab and Speaker and put the head in a mojotone super reverb head. I replaced the small output transformer with a 69 Bassman OT and it sounds great for bass now. Basically a tube rectified Bassman or showman. I love the feel of a tube rectifier and love the tone of a Fender Bassman so this is the perfect amp for me. Great for bass once you replace the output transformer.

  • November 29, 2019 at 7:55 am

    I bought one on eBay a number of years back , was pretty beat up cosmetically and stock other than the trapezoid speaker was replaced with a 15” but was blown, but the head part worked fine and and sounded great connecting it to various Cab’s.
    I installed a 4 X 10 baffle of speakers a friend gave me from an old Yamaha SS amp he was parting out, no other changes or mods, It sounded phenomenal !

    • December 26, 2019 at 3:36 pm

      Corey, can you please lead me in the right direction as far as the dimensions for the baffle you installed?


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