Fender Silverface Vibrosonic Reverb

NO Schematic
Production: , , , , , , , , ,

Model/Circuit Number:
Years of Production:
1972 – 1981
Era: Silverface
Configuration: Combo
Controls: Silver, forward facing w/ blue labels
Knobs: Black skirted w/ chrome center, numbered 1 – 10

  • Front: Normal: In, In, Bright Sw, Vol, Treb, Mid, Bass – Vibrato: In, In, Bright Sw, Vol, Treb, Bass, Rev, Speed, Intensity – Master Vol – Pilot Lamp
  • Rear: AC Outlet, Ground Sw, Fuse (2½A), Power Sw, Standby Sw, Speaker Jack, Ex. Speaker Jack, Vibrato Jack, Reverb Jack, Reverb Out, Reverb In


  • Dimensions: 20 x 26 3/4 x 10 5/8
  • Hardware: Large Chassis Straps 5 5/8”, 16” Tilt-Back Legs
  • Handle: Black Strap Handle
  • Feet: Casters
  • Corners: Corner Protectors


Covering Material

  • Tolex/Tweed: Black Tolex
  • Grill Cloth: Blue sparkle grill cloth withaluminum frame (68-69), without aluminum frame (70-81)

Logo: Grill mounted, raised, chrome & black script
Weight: 85 lbs.

  • Size: 1 x 15
  • Impedance: 8 ohms
  • Model: Fender PS-15 (72-74), JBL D-130F (74-79), Electro Voice (79-81) or Gauss 15(For more info, check out the Jensen Replacement Speakers)

Effects: Reverb, Tremolo
Watts: 100 or 135 watts

  • Pre amp: 2 x 12AT7, 1 x 12AX7A, 3 x 7025
  • Power: 4 x 6L6GC

Bias: Fixed with Bias Pot.
Rectifier: Solid State

Comments: Fender switched back to the blackface era cosmetics some time in 1980. Vibrosonic Reverbs produced between late 1980 and 1981 have a black control panel and silver sparkle grille cloth. A Line Out jack, hum balance pot, and a pull boost sw. were added near the end of the models run.

12 Responses to “Fender Silverface Vibrosonic Reverb”

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  1. Comment by Carlscustomamps — December 19, 2011 at 12:37 pm   Reply

    This amp does NOT have a bias pot but instead subbed in a output tube matching pot. This allows you to use slightly unmatched pairs in the amp but does not serve as a bias control leaving no way to accurately bias the amp without modification.  

  2. Comment by Tech — February 13, 2012 at 10:10 am   Reply

    An amp with an output tube matching pot vs. a bias pot can easily be biased by changing the value of the resistor that is soldered to the tube matching pot.  An increase in the value of this resistor will decrease the current in the tubes … a decrease in resistance in the value of this resistor will increase the current flow in the tubes.  By installing a trim pot in place of this resistor, the bias can be varied even easier.

  3. Comment by Terry Packard — March 20, 2013 at 5:41 am   Reply

    Looking to sell one. Any info about outlets would be helpful.

  4. Comment by Chris van der Drift — August 19, 2013 at 4:00 am   Reply

    I just bought a 1974 “according the first owner” Fender Vibrosonic Reverb with SN#A825522. You’ll need to produce quite some noise for a few secs before it sounds great/clean. I discovered one of the high voltage elco’s (220MFD) is leaking witch explains a lot. Also I notices the coupling capacitor between pre-amp and pahse inverter of the power amp is burned a bit and has blisters.

    I’m looking for the wiring diagram. I have the schematics. I’d appreciate any help. Cheers Chris

  5. Comment by ColleySeptember 5, 2014 at 5:49 pm   Reply

    I got rid of one of these like a fool in about 1982. I would love to have it back. It sounded better with my Gibson ES335 than any amp I’ve had since then.

  6. Comment by DuaneOctober 7, 2014 at 8:40 am   Reply

    I have one of the last 1981 silverface versions with a 15″ JBL, and it always pleases me to play and hear it. Quiet, big, and clean. It is like a Twin Reverb with a 15″. NOT FOR SALE.

  7. Comment by Jan — November 10, 2014 at 6:12 am   Reply

    For years I have this amp,nice sound for my steelguitars.I just changed all of the tubes becouse of a ticking and burbeling sound.You can still hear it when you on te amp.maybe the high voltage elco’s are leaking too.
    Dificult to find out without tools.

  8. Comment by Dale — December 10, 2014 at 6:35 pm   Reply

    I am trying to date my Fender Vibrosonic Reverb Amp Ser #A739383
    Also wish to identify the speakers.
    This amp has 2 X 12″ speakers, # 5379 (Not a single 15″)

    All the charts I’ve looked at have A + 5 digits, so this confuses me a bit.
    Also, I see only Vibrosonic Reverbs with single 15″ speakers.

    Can anybody help me with this? Thanks

  9. Comment by Jack — February 3, 2015 at 5:35 pm   Reply

    mine also has two `12’s. Traded for it in 1977. Had altec lansing speakers, I replaced w/JBL’s. Wish I knew more about it…

  10. Comment by DenisSeptember 15, 2017 at 1:33 am   Reply

    I have the same Fender Vibrosonic Reverb 1979 silver face 135 Watts and a 15″ JBL just amazing amp all Tubes Clean and very smooth weights 95 pounds but has casters lol and kick back bars support… Played with a band ,we were booked for14 years 3 too 4 nights a week never missed a week, played with them every week for practice also this amp never ever let me down it was as smooth as silk or raunchy as hell. I still have the amp and was offered 3500$ for it I still have it the sound is out of this world thanks for hearing me out lol…

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