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When to JUMPER Your Marshall PLEXI!
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- Опубліковано 22 бер 2020
- A Marshall Plexi has 4 inputs and 2 channels. Using a JUMPER cable or patch cable you can play both channels at the same time and create new sounds. In this video I go through how I do that. This concept is referred to by a bunch of names like Jumpering, Jumping, Bridging and so on. I'm using a 2015 Marshall 1987X 50W Lead Plexi Reissue with a 1971 Marshall 1960B 4x12 with 1973 G12M25 75Hz Pulsonic Greenbacks, playing a 2013 Gibson SG Standard Aged Custom Shop with a late 1970s DiMarzio Super 2 K10 in the bridge position.
In these uncertain times, it's comforting to know Johan still has all our Plexi backs! God bless and rock on 👍🎸😎
Thanks my friend, Rock on! :-)
Such a great amp no matter how you dial it! I usually won’t jumper at high volume with humbuckers, too mushy. Low volume, especially if you are using pedals, is where jumping really comes in handy. Thanks for cranking it today, Johan!!
johan elevated to the heavens when putting all knobs on 10 hahaha
Hahaha! 😂
Really 😂🤣😂
I love Plexis, my favorite amp without hesitation. The all knobs at 10 sound is unusable for me, the low end all blown out and loose. No thanks. As a specialty sound, once in a while for a specific line or occasion, sure. But as a regular setting, no way. I prefer just high input, bass on 5 or lower. Johan's preferred clean setting, is the best by far for low gain.
That SG sounds so good with everything cranked - I’ve opened a window and I’m pretty sure I can hear you here in England!
Great sound.
I live in Arizona, you can probably hear me all the way in England when I turn mine up =))
I like the squish you get when everything in on 10, that’s when they amp shines and distinguishes itself from most other amps. :) great video!
Thanks Jason!
The jumping was clearly evident on the clean tones. It makes such a huge difference! Thanks for the video Johan!
Wow, that's some killer early Ace Frehley tones with all the settings at 5 and with it jumped...sounded amazing. 👏👏👌
Always jumper the channels, gives you so much flexibility with tone at high volumes, one of my favourite amps ever made
I have only discovered Johan's channel recently, but i have watched a lot of stuff on it, love vintage plexi tone, love his playing. I often wondered why he doesn't jumper the channels more often. I build amps as a hobby occasionally, I have made a number of plexis with just one input jack and a piece of shielded cable running to v1, with the 68K grid resistors mounted at the socket and joined together and connected to the input shielded cable, so the 2 channels are always internally jumpered. Some people mistakenly think you do this for more gain, but the reason to do it is for tone shaping to blend in lower frequencies to the bright channel. It sounds killer. When you combine the "fart" channel and the "icepick" channel in the right amounts, it's magic.
A wonderful good morning Alltogehter. It's a pleasure how versitaille a Marshal is. Thank You Johan. Learned so much by listening to Your Chanel. Amazing! Keep on rocking especially These days my friend. Stay healthy 🤗
Äh Cheers 😅👍👍👍
Greetings from Canada! Looking forward to this for us Traynor enthusiasts!
Cheers from Gothenburg, Sweden!
I certainly fully enjoyed the semi clean tones ! Yes, Marshall tone is subtle !
Ooh that's a good one! Hardly anyone has addressed jumping jacks. Thanks for sharing brother and Be Well Johan!
Thanks brother, stay safe!
Great video Johan! With my '75 model 1987 I don't like to jump the channels, but here's a cool trick: try turning up the 2nd channel volume control without the jumper cable while you're plugged into the 1st channel. That's what I like to do. Plug into the high input of the bright channel, turn it up to about 8 and if I want the sound to be fuller and have slightly more gain, I just turn up the second channel volume to about 5 or 6, without jumping them.
Thanks! Yeah that channel coupling have varied a bit on my amps.
Hi Troy! I've heard about that method before. My 1987x is from 2012. Un-modded. However I don't seem to succeed. I try to plug into normal channel low sens and also turn up volume 1 a bit to get a usable clean tone. People on UA-cam are getting a great "pedal platform" clean sound but I don't. Any idea why? Reissues not wired the same maybe?
@@killersajmon Hi Simon. The reissues are wired exactly the same with regards to this particular "feature". When you do this, you shouldn't think of it as mixing channels. If you plug into the normal channel, you won't get any extra highs by turning up the bright channel (which is what happens when you jumper the channels with a cable). When using either one of the channels, some of the signal will always bleed to ground through the other channel. That's how the circuit works. By turning up the channel you are not using, you simply lessen this effect, making the tone slightly fuller and hotter. So, if you're using the normal channel, turning up the bright channel volume will only make your tone fuller and hotter but not brighter. This trick is more useful when using the bright channel (particularly if it still has the bright cap) which can sound a bit thin in some situations or with some guitars. Hope this helps.
@@troyguitarist Thank you so much for the explanation! I think I get it... Gonna experiment first thing in the morning! Cheers!
@@killersajmon no problem at all. Enjoy your amp! Cheers
great video, displays how useful the jumper is! Heard a bit of Gary Moore there, love it. Stay safe.
Thanks Mark! You too! Cheers
Cool! Ask a question and 1 video later... answered!
Hahaha! Then it must be a really good question! 🤟😀
@@JohanSegeborn Rock on, Johan. You're an invaluable service in the guitar community! 🤘😎
I use the jumper all the time. Individually, one channel is too bright, the other, too dull and muddy., By blending the two I get perfection.
I'm sure you're aware but even when not jumped together, the volumes still have an effect on tone. So into the bright channel, be sure to turn up the normal channel and vice versa. It will balance out the sound
That is exactly my experience.. you find the sweet spot and never move away from that ! But at different levels of loud - it changes.
Cut the bright cap
@@bradleyblauvelt1572 Sheerest utter insanity. I've played with bright cap values and I like the aggressiveness of a big bright cap. Cutting it out is the LAST thing I'd do. Tried that...cut the balls right off. NO.
@@Turboy65 suit yourself!
I was testing this on JTM45 with modified bright capacitor to 500pF, 1st stage had warm bias cathode for normal channel and cold bias cathode for lead (bright) channel and difference is even more prominent. I didnt need to use vol. 10 on any channel. I started with playing normal channel and slowly adding lead channel. Character of the sound is amazing. There is a lot of settings that can be found interesting.
Thank you Johan😁✌ Johan you're the internet's Marshall King. Gotta love those Marshalls.
So brilliant sounding Johan! Thanks for sharing your discoveries!
To me it sounded like the jumped segments were out of phase (thinner and nasally....) Just my opinion. Both sounded good though!!! Loving the plexi sound!!
Thanks! The jumped segment were indeed less spatially rich
It's amazing how you can get anything to sound like a plexi... Haha. That was very interesting and informative. Thank you!
5/5/5 -The normal channel has a really interesting Clapton tone almost like it’s out of phase. Big, thick, warm crunch. Love the two of them together. The bite on the brilliant channel w/that SG is just sexxxy!
I think that what EQ settings and what channel volumes you use is all going to depend on two things: The speakers you're using and the tone you're going for.
In my case, I was using a cab with 4 Weber Blue Dogs with ceramic magnets in it with my 1959 Reissue, a rather bright sound. To keep it from turning into an icepick in the ear, I used the bottom I input and jumpered from the top I input to the bottom II input. None of the knobs were on 10 except Volume I. Volume II was on about 6 to 7. I don't remember the EQ or Presence settings--I no longer own that rig. Nothing was below 5, though, and I believe that the Volume I being on 10 probably meant that the Presence was pretty much bypassed, anyway.
All this rendered a slightly dark tone with a fair bit of crunch, but not grind, and I used a TS-808 on full volume and 0 drive to hit the front end of the amp. The sonic character of the Tube Screamer tightened up the bass slightly and gave a pleasant crispness to the top end and put me into hard rock/New Wave of British Heavy Metal territory. Right where I wanted to be.
I tried the "everything on 10" thing, but on my rig it sounded like ass.
I've written too long a response here. If you're still reading, I'm not sure whether to congratulate or pity you. I guess my point is how huge the variables are of getting "that tone," whatever that is for you, and how finding it may require not just using a simplistic "just dime it" approach.
I have a studio vintage 20 watter.
I set it like this:
Pres 10
bass 1
mid 10
treble 4
high treble 8
normal 5
Diming the presence and mids gets the most gain and when you roll back the volume you get chimey cleans. The only drawback is having the presence that high gets you tons of hiss from the amp.
Just bought the sv20 it's sick...I was wondering if the hiss was normal ...and I have been reading it is . U confirmed it . Seems like some comes from the high treble channel too. But not the normal
Dont forget that the amp even jumpered with volume 2 on zero will still sound different and have an effect on the tone compared to no jumper.
Great video Johan! It really showed the difference. It's much more pronounced when the volumes are low...
Thanks, glad you like it!
@@JohanSegeborn Hey Johan, it would be awesome to see you playing the Marshall Studio Vintage and Studio Classic, which are the 20W versions of the 1959SLP and JCM800. Have you got the chance to try those already?
Loved these tones you got, Johan, it’s interesting that without much (or any) bass it still sounded more or less beefy when louder.
I always hated channel “1” by itself, was unusable to me (since the classic sound is in channel 2) and couldn’t crank it to ten in my parents house. I didn’t understand channel jumping in the mid 70’s on my 50 watt 1987 (made in 1971), but somehow stumbled upon it. I used only a EHX Big Muff Pi for my fuzz/distortion since in 1973-‘74 knew of nothing else at that time to get a bedroom sound. In my naiveness about amps I didn’t use a cable to jump in but either just had a short cable coming out of ch 1 not hooked to anything but cracking the volume on ch 1 just enough to introduce the right amount of treble into the Big Muff Pi tone to make it less woofy and bassy and make it more usable. Either that or without any cable at all in ch 1 I just increased the volume to get the right mix. It actually did pretty good at making a more primitive fuzz sound more modern.
All the EQs at 5 and both channels at 10 legit sounded like Alex Lifeson's tone on the very first Rush album. So tasty.
Wow! I think I like the lead channel by itself best.
Hi and thanks! Really helpfull vid ... I just bought an 1987x and your comparaison helped dial and experiment different tones. Cheers
My amp (homemade) has a plexi style preamp. I always use the jumper, adjusting the tone controls (Bass 4, Mid 5, Treble 7) and then playing with both volumes.
Yes! Plexi Baby!!!
Love That Pure Tone Amp
Do you know where can i get one?
I think I want to be in the room with all knobs on 10. and you have great technique. your vibrato is fantastic!!!!
Johan will make it sound like a Plexi! \m/
Yes he will! He always does...
Be sure!!! :-)
@@samueljett7807 ;oP
Or does the plexi make him sound like a Johan?
I've always jumped my vintage 1974 Super Bass, and I like the tone controls on 10 except Bass at around 4, then I like the Bright Channel at 10 and the Normal channel somewhere around 3 or 4. Through a 1960TV cab as seen on my avatar.
And I also found out that there are 12 ways to plug into a Plexi with or without a jumper. They all have different tones.
Thanks Jo! Love when you play at stage volume! (ie; ALWAYS) Horns Up! \,,/
Just as with my old car , always have a pair of jumpercables ready . They will make you go further.
Hahaha! Same principle 😀
I never considered *not jumping my 73 50w Marshall back in the day. Sounded so much better to me.
Would be great with a decibel meter in your videos. We can see the camera shaking, but how loud is it? ☺️
It’s around 120dB :-)
The left screen shows clearly that the mountain was shaved down to bedrock.
Holy cr@p.. 120 dbs?!!?
I use to own a JT45 and everything on 10 is quite amazing. You touch a string and the amp takes off its like turbo charge Hemi Jet .However as i get older u under stand alot of the pros like Anugus run their tones around 3 .Master around 6 there is a sweet spot to all amps and if you go beyond it they get muddy however i really like this amp everything on 10 lead sound and how you mixed it .I just ordered a 1969 Small box SA 50 watt cant wait to get it and put it on 10 10 10....
How about a whole album of riffs, called “knobs on 10”? That sounded great!
I think the moral of the story is: you can't make a Plexi sound bad. ;-)
I really liked everything on 10! Thanks man.
Semi-clean tones sound AWESOME!!!!!!
Cool cinematography man
ive found if I run my lead channel on 2, and blend the bass channel in to between 4-6 I get an awesome AC/DC crunch ('76 JMP 50w big box)
All knobs on 10 sounded great of course, but those semi cleans were killer, especially towards the end of that part.
Divine. I think it would depend on the situation, guitar and band mix, adjusting the 'normal' volume to add some body or lower mids to taste....if needed.
Thank you for this video.
Sure nothing wrong with either ...without is much cleaner and well scooped mids...but when jumped give a real midtone boost which is just great big warm sound and everything was jumping including the camera!...luv'd the Gary Moore vibe...good to see the SG back in action ...cool tones as always
Hey Johan, was wondering if you've played the newer marshall sv20h, and if you have, whats your thoughts on it.
Just got delivered it's sick
I wanna see him play that bad boy too!! 😃👌
A rocking Blue Bossa! 👍😃
Awesome👍 sounds great Johan..
That was on 11 at the end my headphones were pumping Great stuff always Johan best channel without the waffle and shit talk
Johan, try a Y cable instead. I believe you will appreciate it. What you do in jumping "normally" is utilising both high and low input on one channel and either high or low input on the other.
The Y cable gives you more choices; for instance high input on bright channel and low on bass channel, reversed or even high/ high. Your possibility to dime output volume and bass/ treble will probably meet your expectations with the Y cable and will be more balanced.
The reason I placed an on/ off toogle for split or shared cathode on my JTM45 was to compensate jumping.
Tak for vidunderlig lyd. Johan
What do you mean by "Y" cable ? Do you mean the amp end of the guitar jack should be out fitted with a "Y" cable ? ( so that the guitar is running directly into both channels?)
@BanditPanda. I have seen George Metropolis selling them. I believe it would give a more comprehensive mix of the channels.
nice Gary tone on the Gary licks!!
Hi, Johan!
I liked the idea with the lows. Its not available for me now, when I am out of the band, and we can't play like we did it for 20 years, so watching it twice.) See you! Carry on! We need you healthy!
Zigfrid
Thanks my friend! Stay safe
Beautiful tones Johan,stay healthy and safe mate! \m/
That was awesome, thanks for cranking it 👍🏻
To my understanding the channels run parallel, not in series when bridged, so you don't get more gain. Correct?
does anyone know when this trick began to be used to get this sound?
Have you ever had any trouble with the indicator light ? Every time I touch mine seems like it has a false contact or anything, It turns off but the amp is still working.
Hey hows it been going Johan . So if you Y cable it into both top inputs I read on a gear page ? I lost a channel doing that ? Is it controlable w/ both knobs/ channels or does it just go thru one channel out ? Not dual Vol. controls ? . Ok man its weird I thought I'd hit U up on this . It just bypassed/x out one of my channels didn't blow . Stay Safe
All knobs on 10=Johan is in heaven 7:37
I think bridging channels on Fender Tweed Deluxes is a huge mistake because there is a very useful interaction between the two volume controls when you are only plugged into a single channel. But on a Marshall I can’t hear any benefit in not bridging the channels.
Best is (for strat) plug in to normal channel and rise volume of lead channel (without plugging anything to lead channel) until you got best tone. I've got shared cathode and i'm not sure how is it works otherways.
Psychedelic visualisations!!
When you jump channels, keep in mind, you loose a stage of gain (not that it matters). I have a '68 lead 50 that you absolutely have to bridge the channels to tame the high end (and add more bottom end). Extremely aggressive amp though..
Yeah my stock 71 1987 has a very aggressive bright cap and it’s nearly impossible to get lower gain AC/DC ish tones straight into the lead channel because of how harsh it is. Vol over 7 the cap starts getting mixed out but by then it’s too gainy for AC/DC.
Jumping channels lowers the gain a little and warms up the tone at lower settings so all controls at noon is a great medium crunch.
I think some of my issues come from using a Hotplate at -12db which will tend to thin out and compress the tone.
@@zachariahwade8482 Very important to AC/DC tone, and just dialing in a sound in general with a cranked amp vs. pedal drive is your guitar's volume knob. It has a lot to do with input impedances used in amps vs pedals(I know no one mentioned pedals here but wanted to include that for anyone who reads this). Naturally, older amp circuits like the Marshall circuit in this video respond better to this.
You need a non treble bleed circuit(modern wiring works better vs 50's for taming SG's brightness) so that the volume knob roll-off will warm the tone in a much more natural way than the tone knob. When playing an old Marshall unattenuated at 7-10 on volume(with everything but bass at 10), a guitar turned to 10 most likely will have microphonic squeal(and be rather harsh), but will disappear somewhere around 7-8 depending on pots, pickups(the old T Tops Angus used aren't potted), where you are standing in relation to speakers, and pickup height. Living on that edge is where the magic and infinite sustain is. The reduction of the 3-4k region when the guitar is backed off,(plus the amp being cranked to 7-10) will give you that furry, soft midrange texture heard on the Back in Black album. Angus is a huge Paul Kossoff fan and that is where this tone comes from, amongst many other players from late 60s and early 70s acts. Kossoff's live tone had mids very similar to the Back in Black albums tone, especially when you factor in different studio production techniques.
Before I understood this, I never understood how people could run Marshall with Presence, Middle, and Treble at 10 with no bass. Turning the guitar down doesn't add bass/low mids, but it does give more perceived bass and low mids because the upper mids and highs aren't covering up what is already there. Angus runs audio taper pots and stays around 8 on his guitar knob. I have linear pots and his 8/10 is much closer to my 5/10. I run my amp at 5-0-10-10-8-0, bright input only, with rhythm sounds anywhere from 3-5 and leads from 5-8(my 8 would be like 9ish on an audio taper pot). Derek Trucks, obviously very different tone, also mentions that SG's sound better with the volume on 7.5-8 vs 10.
I believe Angus saying he always set the volume at 5 for rhythm and 7-8 for leads was him talking about the guitar volume and not the amp. That was the way everyone ran Marshalls back then(and why Johan runs them that way) so it makes sense that he didn't clarify amp volume vs guitar. Give it a try and don't be surprised if your guitar volume never goes above 6-8 with a cranked Marshall again.
71 is extremely aggressive... the 68 is a sweetheart compared to that ;)
Hi Johan,
Great execution of the concept for this video.
I have a 1973 Superbass 100w and I never jumper the channels, however I have not experimented with turning the bass down to zero. I do like the compression that you get when running both channels together but it has always sounded a bit flat and muddy to me. That may be because I keep my normal EQ settings and just add in the bass channel. I’m definitely going to try this with the bass control turned down and see how it responds.
Thanks for making great and informative videos. Cheers!
Thanks Nick! Glad you like them!
I love the Presence control and usually run it about 6,... but should we ever use it at 10? LOL!!! probably not
Johan, awesome as always and great topic. Could you possibly do a video on cabinet construction? I've got 1959slp reissue 2001 with 3 cabs JCM800 4x12 and 2x12, both have the particle wood back plate, my 1x12 has the birch? back plate. I think the 900 series moved away from birch plywood to the particle board right? Could you talk about these differences in sound (and weight)? thanks JimmyC
Great tone......would love to hear a comparison of P90 pickups to the Dimarzio K10s you played thru.
Very good. Timing just for me to pay attention.
4:55 not
4:19 Jumping
For wah pedal users…I’d like to mention that jumping the channels also makes the wah sound muddy. Jump carefully 😊
watching the speaker cloth push air is hypnotizing.
Patch cable + attenuator + OX box = Plexi tones at home.
Answer: Always!
rockin' blue bossa :)
I wonder what the difference between jumping channels and an ABY pedal is
2:11 is the Ace Frehley setting.
Indeed! Love his tone
You will laugh...but for business reasons I spoke with Ace last week. Fun times for a dude who plays guitar because of him since 78.😀
It would be cool to daisy chain a cable into all 4 inputs
I was just thinking about using two y cables then using another y cable to connect all the inputs haha
As always top notch ....could you please do the same with a Vox Ac 30
cheers ,Guy
Apart from the increbible sound, Johan what a beautiful seascape! Where is that place?
Thanks Francesco! That’s the island of Tjörn in Sweden.
This is great. I seem to remember you have a 2040 Artiste also, I have one, but rarely get the chance to crank it. How do you find the bridging on that? Keep on keeping on.
does jumping wear out tubes faster ? is it harmful to the amp ?
Wow all knobs on 10 any compression? I like the Semi clean tests, very AC/DC.
If they are in parallel what's the matter to jump from one or the other?
The volume must have been incredible! (:
"Chewb scramuh" -The British
Hey Johan... I know you're a Marshall guy (though I dig how you make Fenders sound)
but I wuz wundrin' if you could demo some Traynors for the Cannucks or maybe a Mesa Boogie for us nut cases in sunny Southern California...
As always, luv your sound. You've re-sparked my interest in distortion. Thanx (I think)...
No, I really am enjoying it... So many waze ta plunk a guitar! cheers
My Marshall sounds different when I wear different color g stings
So cool!
All knobs on 10!
I've never bridged the channels on my JTM45 in 32 years apart being curious about what it did, which waa nothing I ever wanted to hear again. Just plug into bright, eq it little (add some bass) and forget about the folklore. Oh, a guitar with P90's helps, enough bottom end right there.
Thank you JS! Quite possibility the only amp I've heard that still offers a usable guitar sound with everything on 10 (and it sounds good to me!). What was that like in person lol? I'm afraid of trying the same to my DSL. Not because of the volume, but because I don't think it's technology would survive. They don't make 'em like they used to - cheers!
Thanks! A cranked 50W is perfect in terms of feel. A cranked 100W full stack is a bit too physical for longer jams in a small room. Cheers!
Parisienne Walkways!
Love Gary Moore
Rest In Peace Gary!!!
KILLER AS USUAL
Thanks John!
Wow all knobs on 10 any compression?
It's Like hear Angus in If you want blood live 🔥