Fender Prosonic

Schematic(s) prosonic.pdf
Production: , , , , , , , , , , , , , ,

Model/Circuit Number:
Years of Production:
1996 – Present
Configuration: Combo
Controls: Black, forward facing w/ white screened labels, controls numbered 1-10
Knobs: Black Pointer

  • Front: In, In, Channel Sw, Vol, Gain 1, Gain 2, Treb, Bass, Mid, Master, Reverb – Pilot Lamp
  • Rear: Rectifier Sw, Power Sw, Standby Sw, Ex. Speaker Jack, Footswitch


  • Dimensions: 18½ x 24 x 10½
  • Hardware: Medium Chassis Straps 4 5/8”
  • Handle: Black strap handle or black leather handle w/ footman loops
  • Feet: Glides
  • Corners: Corner Protectors


Covering Material

  • Tolex/Tweed: Snakeskin, Red, Sea-foam green lizard skin, and black Tolex
  • Grill Cloth: Silver Sparkle Grill Cloth

Logo: Grill mounted, flat, chrome & black script
Weight: 54 lbs.

Effects: Reverb, Channel Switching
~Watts: SS Rect/AB: 60 Watts ; Tube Rect/AB: 50 watts; Tube Rect/A: 30 watts

  • Pre amp:
  • Power: 2 x 5881

Bias: Fixed Bias
Rectifier: Class A/5AR4, Class AB/5AR4, Class AB/Solid State (switchable)

Comments: The Prosonic includes a switch for changing the operation class of the amplifier. (see Rectifier)

5 Responses to “Fender Prosonic”

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  1. Comment by Prosonic Fan — November 18, 2011 at 11:55 am   Reply

    Prosonic discontinued in 2002. Several models were made in the Custom shop before assembly line mass production.

    You know you have a Custom Shop Prosonic if it has four things.
    It will say “Fender Musical instruments” under the jewel lamp.It might say “Fender Custom Amp Shop” on the tube diagram inside the amp.The serial number that starts with LO instead of CR. It has a green jewel light (not a red one).

  2. Comment by Michael Bauer — September 28, 2013 at 7:52 pm   Reply

    Just to set the record straight, the Prosonic was designed by Bruce Zinky of the Custom Shop, but none of these amps were actually built there, nor were they sold as Custom Shop amps. The “LO” prefix to the serial number indicates that the amp was made at the old Sunn Amp factory in Lake Oswego, OR. Late, production was moved to Corona, and those amps are indicated by the prefix “CR.” The Lake Oswego amps are supposed to have better-quality components than the later models, though. Fender is said to have made modifications to Zinky’s original design, but with a few circuit and tube mods, these amps go from good to really great!

    • Comment by Barry Amundsen — October 23, 2013 at 6:17 pm   Reply

      Mine is loudest when the rectifier switch in back is on number 1 labeled “Tube” and quietest when switched to 3 labeled S.S. AB2. Isn’t that backwards from what it is supposed to be? In the 2 middle position it is mid loudest too.

  3. Comment by Peter Smith — June 11, 2014 at 3:01 am   Reply

    These amps are sensational, especially the early “LO” series. Highly underrated and highly desirable IMO. The gain channel is amazing with cascading gain and compression. The clean channel is more like an AC30 sound, a little darker than traditional fender clean channels. These amps are becoming rarer and collectable as the word gets out.
    If you can get a red snakeskin or sea foam green custom shop model, (only 500 made) go for it, you will not be disappointed.

  4. Comment by Colleen — December 11, 2015 at 11:12 am   Reply

    My friend just purchased a sea foam green lizard skin amp. The backplates that protect the tubes are missing. Is there somewhere I could get replacements manufactured or ordered?

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