Did the Jake E Lee mod to my Marshall JMP…

  • Thread starter Thread starter RedPlated
  • Start date Start date
RedPlated said:
I’ve had this 1980 JMP for years. All stock except for a Metro loop in the factory speaker jack holes. I saw Jason from Headfirst had posted a video with schematics for the JEL mod. Credit to him for the specs.

I decided the mod sounded like a great plan for this amp. And it’s fully reversible. I also changed the input to a ground-shielded coax cable. The stock hot shield kills treble and adds flubby bass.

I’m extremely impressed by this mod. The amp sounds like a great Marshall should. Just enough gain and good frequencies.

I made a clip last night at bedroom volume. Gain is around 6-7 on the dial. It fills out more at higher gain levels due to the bright cap still in place. I like it here for more cut.

Les Paul with Suhr Aldrich into a Cameron 4x12 with G12H30 anniversaries.



I added a VFE Standout to the front end and switched over to a different Les Paul with Throbak SLE-101+ and got this:

Click to expand...

Silly question, 2.5 years later:
Does this mod render the low input useless? I didn't like how the Legendary Tones Hot Mod mucked with the lo input on my 2204.
 
LPMojoGL said:
Silly question, 2.5 years later:
Does this mod render the low input useless? I didn't like how the Legendary Tones Hot Mod mucked with the lo input on my 2204.
Click to expand...
It was actually still pretty usable. I’ve long ago changed the circuit to a 3/4 stage MOAB type but without diodes.

You can even do some tricky stuff with v1b cathode utilizing the switched input jacks. You can make it so that the 2.7k/ .68uF cathode turns back into a 10k unbypassed when in low input. I’ve done that before. That’ll make it a lot cleaner.
 
LPMojoGL said:
Hmmmmmmmmm
Intriguing

How does it compare to the MOAB?
Click to expand...
Feels a lot lower gain because there’s no diodes. But in the high input (4 stages) it sounds soooo good. Very articulate and tons of clarity for a 4 stage circuit.
 
RedPlated said:
Feels a lot lower gain because there’s no diodes. But in the high input (4 stages) it sounds soooo good. Very articulate and tons of clarity for a 4 stage circuit.
Click to expand...
I dig 4 stage circuits. The Rockerverb and SLO come to mind.
 
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