I have a plexi bass and metal face super bass and prefer them to my metal face lead as well. Thanks guys. I reccomend to buy Doyle's Marshall book, there you can see all you want to see and to know.

Those circuits, IMHO, will sound best with an M type speaker, maybe mixed with an H type, but in a closed 412 I would go all M Greenbacks or some clone of that speaker. I have a plexi bass and metal face super bass and prefer them to my metal face lead as well. Too much difference between circuits IMO. You must log in or register to reply here. I'm sure you can find an amp builder who builds something that has options like this, or find someone who can if you really want to have both lead and bass flavors. I prefer the 50 Watt models, either the 1987 (look at my avatar) or the 2204 series. Became then much brighter and more aggressive than the Plexi era circuit, (You must log in or sign up to reply here. The Marshall Super Lead Model 1959 is a guitar amplifier head made by Marshall.One of the famous Marshall Plexis, it was introduced in 1965 and with its associated 4×12″ cabinets gave rise to the "Marshall … Before the mod, I always felt I had to jumper the channels to control the brightness/in-your-face sound of the bright channel. But boutique builders and DIY'er's are commonly adding switching to change between 2 for 3 or more cathode-bypass caps for V1 and/or V2. I think the most common are the split/shared cathode switch, negative feedback knob, and tone stack switch. $169 - A lower price evolution of the MXR Dookie," it's based on Greenday's Billy Joe Armstrong's two custom Marshall 100w Plexi Super Lead amps. Those circuits, IMHO, will sound best with an M type speaker, maybe mixed with an H type, but in a closed 412 I would go all M Greenbacks or some clone of that speaker. I seem to remember the 1987 coming on at pretty much full volume and then just adding gain from there. So in theory, the *most* gainy amp is actually a 1969 or 1970 Super Lead with split cathode, 100k@4 ohm NFB and V2 .68uF bypass cap. Here is a basic list: Can you easily and completely toggle switch between 1986/1987 models? I'm no Marshall expert but I do have some experience here. You'll see this with "Decade," "'60/'70/'80," and Modern/Vintage" switching on a lot of Plexi- and JCM-style amps. The rest, I'm sure, will have some difference, but I've read perhaps not as much as the split/shared cathode- anybody know for sure? ). The Lead is great and I can get the same tones jumping the inputs then using the 2 volumes to blend the tone till I find a sweet spot. I sent it to Victor at the Plexi Palace for some restoration work and he noted it was really a bass head (1986) and suggested restoring it to it's original specs. Is it possible to have an amp or a mod where you can flip a switch to go between 1986 and 1987 specs? For a better experience, please enable JavaScript in your browser before proceeding. Before the mod, I always felt I had to jumper the channels to control the brightness/in-your-face sound of the bright channel. Sounds like the Bass is the one for me. Both are fantastic. You can get a lot of the best of both worlds with the mods above, and just change component values until you have the overall sound that you like.

I think there's a push/pull pot mod you can do to go between split and shared cathode. Now I can just plug right into the bright channel (don't need to jumper them) and dial in the tone I want right away. This is another important part that helps make the bass spec amps cleaner and less gainy. The tone is still all Marshall, but I feel it is more versatile now. He said the 1986 circuit is basically the same as the JTM-45 albeit with el34 tubes and a solid state rectifier. There's a hair less gain now, so the amp stays clean a little longer before breaking up. Since Marshall left the plexipanel somewhere in `69 you can say that the gainiest plexies (stock) are from `68 … I think that may account for a good deal of the difference you might hear. Now I can just plug right into the bright channel (don't need to jumper them) and dial in the tone I want right away. Bass circuits are warmer, fatter, and more headroom. The Marshall Plexi guitar amplifier was an evolution of their very successful Fender 5F6-A Bassman copy, the JTM45 but with just two preamp gain stages it can't really be considered a "high gain" amplifier.. For example a model 1959 super lead from 1968 with a plexi front has no difference to a model 1959 super lead from 1970 with aluminum front except the front. You had me at "Hello"....you lost me at "V30/G12H30 mix". 1959 Super Lead 100 Watt and 1987 Lead 50 Watt "Plexi" Preamp.

No. A center toggle switch offers mid punch, mid scoop and a flat option. The Gear Page is the leading online community and marketplace for guitars, amps, pedals, effects and associated gear. The 1986 comes on a little slower and you can turn the volume up a bit before it starts to break up. Agree with the above assessments of the Bass bs Lead circuits. The 1986 comes on a little slower and you can turn the volume up a bit before it starts to break up. He said the 1986 circuit is basically the same as the JTM-45 albeit with el34 tubes and a solid state rectifier. For example a model 1959 super lead from 1968 with a plexi front has no difference to a model 1959 super lead from 1970 with aluminum front except the front. And most bass spec Marshalls have a 27k negative feedback resistor, and the lead spec typically have a 47k, or even 100k.

I have a 1969 model 1986 that when I first bought it was modified to 1987 specs. The 1986 also takes pedals very, very well. You should go check out the metroamp forum, especially the 50 watt amp kits and Do It Yourself Amp Builds sections.

It sounded great but it was always a balancing act between the two channels to get the tone I wanted. The tone is still all Marshall, but I feel it is more versatile now.
Getting rid of the bright cap made a tremendous difference for me on my 1987 plexi. It sounded great but it was always a balancing act between the two channels to get the tone I wanted. JavaScript is disabled. I had Victor restore it to 1986 specs and I'm glad I did. You can find a lot of info there about mods you can do so you can have both 1986 and 1987 flavors in your amp. I prefer the bass spec myself, but I love the lead spec too. what the hell is a metal face i cant find it on the marshall site, a flux capacitor is how marty mc fly travells back to the future, I'd say the difference (in tone) comes after 1973 when amps were not PTP anymore. I have a 1969 model 1986 that when I first bought it was modified to 1987 specs.

The 1986 also takes pedals very, very well.

You had me at "Hello"....you lost me at "V30/G12H30 mix". I seem to remember the 1987 coming on at pretty much full volume and then just adding gain from there. I had Victor restore it to 1986 specs and I'm glad I did. Discussion in 'Let's Talk Vintage' started by Marshallguy, Sep 1, 2006. I sent it to Victor at the Plexi Palace for some restoration work and he noted it was really a bass head (1986) and suggested restoring it to it's original specs. There's a hair less gain now, so the amp stays clean a little longer before breaking up. I'm no Marshall expert but I do have some experience here. Leads are brighter and more aggressive.

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