Joes Super Lead

Joe's Cat 5 has a midboost, which can add some warmth.  It is also a 68 circuit where as you have a 69 circuit.  A 69 is pure rock and roll crunch (can be a little harsh at times depending on your guitar).  Not very "smooth" IMO, but that is why I love Marshall!  If you want, try some different overdrive circuits or an eq pedal.

I am currently putting a '69 Metro Kit together and will let you know if I stumble across some JB like settings.  I won't be using it for just that, but copping that huge tone is always a goal that I strive for.  I would try keeping the treble and presense settings pretty low and work with the Bass/Middle knobs.  Ben is also correct about the normal input.  The bright input is better for the '70's-'80s hard rock stuff.  Keep in mind a big part of Joe's warm smooth tone comes from the Jubilee.  The Jubilee is his core sound and he uses the Superlead for flavor.  Try a TS808 or Fulldrive 2 in front of the Superlead if you aren't blending amps...it may get you closer.  Good luck!

I agree, the Dumble type amps really smooth things out but live sometimes I have a hard time telling what amp Joe is using.  He gets that big FAT tone no matter what combo he uses leading me to believe that a lot of it comes from how he uses the Jubilee.  You are right  though, Dumble-smooth is a lot smoother than the typical Marshall-smooth.  Interesting about the type of power tubes that EJ uses in his plexis...I've heard this a few times that he prefers 6L6s in his amps.  Lance is a very informative dude on TGP with the inside scoop on all things EJ.  I wonder if he used EL34s in his early days?  The lead Marshall tone from '84-'90 is what makes me go bananas!

Yep- that's golden era- I was talking with Moss Hudson of Brownnote @ NAMM who played a gig and shared a bill with EJ way back in the Tones era. He actually got to play that rig that your speaking of. He was super pumped and then.....Clang.. He said it sounded like **##. No joke. And Moss is a really good player and can cop EJ without worry. He said there waay too much swirl on the twins and SSS and the Marshalls were really loud but ultra dark. He said the SSS amp was like a kick to the gut it had so much power.

I saw EJ in '88 time frame and for sure that was the great era tonally. The Electromagnets stuff is also cool but more cranked Fender type sounds and NO delay. Check out Hawaiian Punch for a good example of those tones.

Alan Phillips from Carol Ann has actually done the tube mods on a few of the Marshalls so he knows the whole deal.

Funny-

Hey Guys,
        I prefer the SuperLead/bass circuits from 1968. With that said it would be hard to get a smooth warm tone from just plugging straight in to any 4 input marshall. They are cleaner amps by nature.   I would suggest using a tube screamer or chandler tube driver.  Set the amp at a cleaner tone.  (normal channel, bass 4 , mid 5 to 6 treb 4 pres 5 vol 4 to 6 depending on how your amp is running).  Make it so you get that slighty dark Angus tone.  Then engage the overdrive pedal.  Set it to taste.  Maybe add a reverb or chorus to smooth things out a little.  Garnish with a sprig of oregano and dinner is served.  A Les Paul or any guitar with a humbucker will help as well. 
Good Luck
Joe B

I'm sure it would be, I'm pretty sure Warren Haynes does something similar when he uses a Superlead.  He uses the Diaz Texas Ranger which is based off of the old Dallas Rangemaster.  I find that, especially when the amp is cranked up pretty good, very little overdrive is needed.

Can anyone point me to this?  Couldn't find thru Google.