SOLD - Marshall 1968 Plexi Super Lead Super Bass Factory Conversion 1959 100 Watt

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I don't come across old Marshall amps all that often.  When I do I send them off to my tech, who spent the early part of the 1970s at Wurlitzer Music in Boston, tech-ing these amps on a daily basis.

The visit to my tech resulted only in a bias adjustment as everything about the amp checked out as fully functional and ready to rock.

This Super Bass amp arrived in the US at a time when everyone wanted Super Lead amps, and it is documented out there on the web that the US distributor performed the non-invasive mod needed to make this a Super Lead.  The Lead sticker on the back is the obvious sign of this.  

The circuit was serviced in the 90's - many caps throughout were changed as routine maintenance.  The power cable was changed to a fixed cable.

Marshalls from this period are somewhat difficult to precisely date.  This example does not sport a date code letter after the serial number, which started out with the letter A in July of 1969. The front "shelf" under the control panel is sharp, not rolled, which puts it to early 1968 or earlier.  The model code on the back puts it to 1968 or later. The feet are changed.

The amp absolutely rocks.  There really is no comparison. 

Shipping will be expensive because I plan on separating the chassis from the head cabinet.  I see the cabinets take damage in shipping from the heavy chassis causing stress on them.  I will attach a plywood plate to the chassis to cover the circuit, and the chassis will be double boxed.  All tubes will be wrapped and packed in the back of the cabinet. 

  • Color: Black
  • Dimensions (HxWxD): 11"x29"x8.25"
  • Weight: 44lbs
  • Watts: 100
  • Date: 1968
  • Where date is noted: Serial Number
  • Extension Speaker Out?: Yes, 2
  • FX Loop: no
  • Reverb Or Other Effects: No
  • Power Tubes: (4)xEL34
  • Pre-Amp Tubes: (1)x7025, (2)x12AX7
  • Pots: Appear all original
  • Tolex: Original Black
  • Grille: Original
  • Knobs: O)riginal
  • Handle: Original, one crack
  • Power Cord: Changed
  • Notes: Feet changed

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