I am FLOORED at how good that sounds with a few relatively simple mods. You killed it! Marshall couldn’t build these like this. The Studio Vintage line would sit and rot on the music store shelves.
@@HeadfirstAmps Are these mods that novice could do relatively easy. I have one brand new in the Box. I've had it a while so I'm not worried about the warranty.
@@jackbyrd4921 I wouldn’t necessarily say a novice, but intermediate with soldering? My experience in the past has been with effects pedal kits and made about 8 or so of those. The two scariest parts for me with the original headfirst mod were: the screws that hold in the main pcb are cheap and strip easily, one of mine totally stripped and I had a really challenging time getting it out, and second - getting the perfect soldering iron temperature to melt the cheap and/or lead-free solder used on the board without burning traces. Other than that everything went pretty smoothly!
Lyle! Thanks brother. I still haven’t figured out why they came up with the Origins alongside the Studio series…they should have stuck with the classic circuits and then perhaps had the Vietnamese assembled ones and the UK assembled at different price points. Also, both the Origin and Studio series are built with identical components right down to transformers.
@@HeadfirstAmps The Origin is an original Fender-based circuit from which many other Marshall amps are modded with. That is why it's a pedal taker. You put a Friedman BE-OD in front, and you have a JCM800. You put a Small Box in front and you have a Plexi.
@@HeadfirstAmps The Origin is based on a Fender bassman. That is why comparison videos use a Fender bassman. You said you don't know why it is made the way it is, and there is your answer. If it is not that, then what is it?
Bought an Origin 50 and sent it back within 5 Days! I put every pedal through it and NEVER got an actual “Marshall” sound out of it. I cannot believe you made this 20 sound good. I literally had to pay 1/7 the price in shipping to return it. Never shoulda sold my 80’s Jcm 800.
OMG….this sounds as good, if not better than the SV20! I can NOT believe you got this sounding THAT good. And, these amps are dirty cheap in the states. The problem though is that, for us newbies, the explanation in the video wouldn’t be enough to buy one and try this on your own. I think I brought it up before in one of your videos. But, this type of mod would be a GREAT live stream for guys that have one who want to get their hands wet with this stuff. It’s incredibly exciting knowing this amp can sound like this, with comparatively little money. But, a bit disappointing, knowing it’s still above a lot of people’s heads. But, you’ve out done yourself, yet AGAIN….. 👍
@@robertlevasseur8896 Hang in there. I told Jason I’d get him some info on how to get online classes going, quite some time ago, and “life” got in the way. It may seem simple, but there’s quite a lot involved in an online class like this (soldering knowledge, making sure everyone has the same kits, scheduling, what would be charged, time-zones…..and whether or not Jason has the patience and interest to teach newbies, etc, etc). So, hand in there. Hopefully, before the end of the year he’ll have some sort of a prototype class setup to test the waters with this idea (so to speak).
Amazing video. Sounds ABSOLUTELY fantastic gonna give this mod a try. Do you have a written instructions list like the headfirst mod ? It would really help.
@@HeadfirstAmps Yes, PLEASE do a follow up video. I just posted a similar comment, not just on how jaw-dropping you got this to sound, but that for us newbies still learning this stuff, we’d kneed a bit of hand-holding. I know I’d pay good money to have a live-stream with on on a simply mod on a cheap amp like this. You should consider it. I’m sure a LOT of people would take you up on it, and you’d make a tone of money in the process. 👍
@@HeadfirstAmps Absolutely! Something in-depth. A live stream where you take a cheaper amp like that Origin, and show a mod step by step. We’d all log in, and send our questions via the chat. I can’t remember what company did it (may have been Stew Mack) but there’s a company out there there makes those simple all-inclusive fender circuit amp kits, and they did a live video showing the online class how to put it all together from start to finish. They record the entire thing so the students (or anyone interested) can watch the build as many times as they need. But, they did it with a nice over-head camera like yours. Obviously, they’d buy the mod kit from you, and pay for the class itself. Short of that, they would obviously need the amp, and would need to have basic soldering skills, and you could even do a small intro session to that if you wanted to. But, there are some really cool things you could do (if you have the time, and interest) with the production equipment you already have. With the reputation you’ve built up, and the interest, I think you’d get a LOT of interest in it. You just have to keep in mind that with something Iike that, you have to assume that short of some soldering skills, you’ll be dealing with people who’ve never built, or modded an amp before, so you have to put on you “Amp modding for idiots” hat :-). Think about it….you’d be helping a lot of people, and could do it from your existing studio, with existing equipment, and make some good money. 👍
That amp have become a complete marvellous beast. Great work waw! Can it be done to the Origin 50 as well? I want to mod mine and that mod sounds amazing!
This is phenomenal, sounds even better than your 2204-esque mod! Do you think it's possible to tune the circuit to get more into mid-60's JTM territory, or would that require different transformers and rectification?
@@HeadfirstAmps if only Marshall would make something like a DSL with a bunch of relays to switch between the four sounds we actually want: this circuit with a JTM or JMP preamp, and the 2204 circuit with a "stock" or hotrodded preamp. Maybe they're just allergic to money?
Awesome, I bought my Origin 20 in 2018 few months before returning to Brazil, it has been my baby, thrully workhorse ...love this amp. You created a monster my friend 😂😂😂😂 I'm going to research this. Thanks for sharing. Cheers from Brazil
Nicely done. I like woolly bass on 10 and can roll off the potentiometer as desired. I would leave the bright channel bypass cap off altogether. You are getting a Van Halen tone. Bravo.
Sounds killer. I like cheap Marshal amps. They’ve been good to me . So have my old peavey Amps. But I never work on them. I just put them up and buy more. 🤷♀️
I swear my phone almost dropped out of my hands... What a FKN SOUND and that's plugged straight IN. No ridiculous Distortion pedals . Great stuff MATE.. The way a MARSHALL should sound !!😜🤟👍🏻
Dr. Headfirst: Are these services you provide, or are the changes also published for DIY'er's who know enough to live to tell the tale after doing the work? A friend is picking up a used O20C & if he's lying awake at night thinking he made a mistake... I'll start out listening to the whole video and taking notes. Thank you
You know, I heard all your demos, and every time I have to say, this is the best sound so far. This time, I am afraid I have to say the same thing again, this is the best sound from your demos so far, I remember the Alta and the first Origin mod sounded great, but this new mod sounds even better. Speechless. I would record an album with this tone.
@@HeadfirstAmps I find it hard to believe I'll hear something better than this Origin mod, it's the perfect guitar sound. But I'll be happy to be surprised by the Alta!
I'm not a trained electrician, apart from fascinated by you guys, I'd like to buy an origin 20 and convert it to a plexi, can you buy these extra resistors and caps readily or do you buy a pack of various values, also I understand you need to decharge a capacitor but which one, I fancy trying this mod out myself, what is/are the main points to consider. Cheerz it looks like simple but I know it isn't.
well the small plexi it is basically like that (except than for the PPIMV) they differentiate the customer targets ...there is virtually no difference in doing a small plexi, the 20w jcm800 or the origin...to be honest the origin with that weird scaling is the most "complex" of the 3 :D...
I have an origin 50 but I had kt 66 power tubes installed. Now its killer. That said I still find myself using my fenders either my twin reverb 2 or my deluxe reverb 2 ( these are Paul Revera modded amps ) and they rock.
Hi.. I am currently working on two Marshalls, one MG15 and one Lead 12, both have a blown transformer, do you have any suggestion for a replacement transformer of these two amps.. ? I live in Europe so it would be great with an option that is available here :D. thanks... cheers..
My 1959 plexi.....now sounds like it pops and boils water when i turn it on .....any ideas HELP!
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Amazing tones! Is it possible to this mod to the Ultra gain channel on DSL20CR, and completely remove the reverb from the amp and use it for something else?
Wow! Sounds amazing. I might have missed it, but does the output power switching still work after these mods? Will you be posting instructions to go from the stock amp to this mod, as you have with the previous mod?
The power scaling works great in this configuration. The video steps through all the changes, if anything is not clear let me know and I’ll look at a follow up video.
Why did I not get recommendations of this great channel from the TH-cam. Love your awesome videos. I am surprised why you your channel has this low subscribers. You deserve more. Which amp is better value for money Marshall dsl100 or Jetcity. And which is better to mod so that we can get best sound and versatility or should I get something else. Thanks for your awesome videos. And thanks for your suggestion also in advance. Please help
Hi Enjoyed your video/s. Have you every work on the Wangs VT15 Head. It is also suppose to be like a Plexi (but based on a JMC 800 layout?)? Reviews say they are a High End Chinese Quality Amp.
Wow! That is incredible. I have an Origin 20 head and while I like it, I’d LOVE to have these mods done. Being in the states, I’m sure it would cost a fortune to send mine your way and have the work done. Well done!! Thanks for sharing the video.
Is this mod meant to sound like a stock 69 marshall super lead? I might do this mod to get those first album Boston tones, but I dont exactly want it to sound like a variac
It’s like a variac because the Origin 20 voltages are so very low. If you did the mod to an Origin 50 it will sound and feel more like a 1987 50w plexi.
I just got the Origin20 today, and it's pretty underwhelming. I'm sure when I take some time to set it right it'll sound better, and with pedals too. I'd love to do this though. I have one of the 50th anniversary white JCM mini stacks that sounds so much better, but it's 1watt so only really good for the house, even though it gets pretty loud. Any idea what it would take to have a tech do this mod? Thanks
I got mine a few days ago and I’m very happy with it. Just dialed it in with a 2/12 cab, Les Paul with 57 pickups, a strat, and semi-hollow and got some awesome tones. And definitely loud enough to play with my band. Just give it a few days, get a decent cab, lower the treble and add the presence to taste. And you’ll be fine unless you somehow got a dud. Good luck
This sounds killer. I know you posted a schematic for the stock circuit on your website, do you have a schematic for the changes? I want to do most of your mods, but keep the master volume. It'd be easier for me to pick and choose if I could see a diagram.
Sounds awesome! Will you be posting the plexi mod instructions on your website? I see the instructions that I think are for your earlier JCM800 mod, but I only see the parts list for the Plexi mod? Thank you!
Did you solve or found out where the bleed problem from pre with input ain at zero and master at full i can hear sound from guitar. Design layout of pcb fault have i heard?
Just got a 50 and i love it. I may have to get another and have it modded. Gotta say it's my first real amp. I hung around s.s. because one of my favorite home audio amps is the gfa 555. But nothing touches a nice sounding tube amp. I wanted the opposite to be true. Definitely not in the 500 dollar range anyway.
Think I'm going to see if my tech guy can handle this mod! I only paid $400 us dollars for mine new. Sounds so nice! Stupid marshall didn't make it like this in the first place 😒
Hi!I am a great fan of your work! I live in Brazil, do you think that it's easy find someone here to do this mod? Besides, my amp is a Origin 50h, the process is the same in this case?
It’s the same mod for the Origin50, but the O50 is fixed bias so if doing a PPIMV that will need to be configured a little differently. If you show the video to a local tech, maybe they can help.
@@HeadfirstAmps wow, really? That sounds almost too good to be true! This makes me wonder why Marshall didn’t just put in those components in the first place
Does this sound like a standard plexi? I don't know if I want to mod my origin with the old video (JMC800) or this new plexi mod. Im trying to get what sounds most like a standard plexi with those full beefy tones and that bite sound.
hey awesome amp and guitar playing excellent headfirst amplification :o) i am. i am was thinking of an origin 50 to mod like this and use for metaL, i am play 8 string metaL bard classicaL kind of ways kind of thrashy, kind of shreddy like and kind of industrial in the way of fear factory and divine heresy. kind of like all styles of metaL really oh well, i run an akai deluxe and clear boost, delay, etc. it sounds like my kind of amp, amps i like are the peavey solid state , crate stealth hybrid, EVH 5150 and EVH 5150 III, and the sig X pittbull vht, i like the bugera i like marshalls although i usually use an eq through them in FX loop, can i mod an origin 50 to sound great and keep or install a nice FX LOOP?
Have you ever worked on the new supro's, specifically the black magick reverb? Its a dark sounding amp i play it with the bass off treble all the way up and its still kinda dark. Is there a mod that can be done that will make it less dark but not really change the sound?
It seems most have lost the point of this amp. It was never ment to sound like a plexi, although it has a lot of the same qualities. The Origin was ment to be a peddle platform. But because it has that plexi aura about it everyone want to make it into a one, That was not what it was designed for.....!
Question: can you get a “less hot rodded” tone with this mod in place? I LOVE this but I’m interested in how much I can dial it back if I wanted to as well. Or is it a resister that I could make switchable from a cleaner to hot rod sorta thing?
Can I make it so the plate bias change to the power section that happens with the flick of the wattage switch also changes the plate bias of the pre-amp tubes?
Hello I just got the Origin 20 combo and want swap out the pickups it was a floor model and one tube was dead I got scared but I opened it up and saw a dead tube I put in a cheap tube I had in my tube box and works okay. I would like to know the tubes you put in yours before I order any. Thank You!
If I want to do this mod from a stock Origin 20, should I follow the JCM800 modding guide video and do that mod, then come back here to make the changes for the plexi? I'm not sure if this just adds onto the JCM800 mod, or if I have to remove components from that mod to do this one. thanks
You’re in Australia, are there any Americans you might recommend for doing your mods? They’re excellent. I wish you lived here, because I’d certainly get buy this amp and get you to do my mods. Pure genius my friend, WOW!!!
That thing sounds awesome! I was wondering, when you do the plexi mod, how pedal friendly is it, like if I wanted to use something as a boost for leads?
Awesome. I’ll look forward to it (there are a few combos floating around here in brizzy so when I see one pop up Cheap I’ll get on it. Thanks heaps for all this info
hi guys! quick question: which is suitable marshall under 40 w. to get sweetest and mellow tone just for clean sounds?.. i mean looking for to fender tweed territory instead silver type… i find this little beasts nice only when they are pushed up wildly especially sv20 or origin . otherwise nasty harsh tone come out at medium volume…especially w/s.coils , i wouldn’t pair w/v30 speaker every time to sort out…
Great video! Wonderful!! I agree with the other commentators. Marshall should make such a version. I have the combo version, which I truly like. However, I must use a pedal with it which isn't needed with your mod.
Hello, I have an Origin 20 with a bad Tilt pot... I think it's the pot... when I dial it off of 0 it pops and I get a volume cut compression sound and nothing changes the whole way to 10.... what pot is it ? 250k ? Is it the pot though ?
The Origin 20 uses a 100k tilt, whereas the Origin 50 uses a 1m tilt pot. Might actually be a bad cap - there is a 0.1uF cap there that acts like a bright cap. You could try a little deoxit contact cleaner sprayed into the pot to see if it sorts it.
is the 20 head enough for a loud band? im asking bkz i wouldn't want to get the 50 to keep up w a loud drummer and have to back off on the master ..... at master and gain approx. maxed on the 20 - will it hold up for a proper gig ? thx for the vid, thx for the settings ..
I’ve thought about it before, even created one but never did anything with it. I have the DIY Group on Facebook but I realise there are quite a few people that won’t post there because of the whole FB thing. Maybe it’s time to get it going..
The origin is the cheapest way, if you can find someone to mod it…or DIY even better! The PT20 is a better quality amp, component wise, but the O20 can be made to sound great. If I was doing the cover thing I’d go with my 800 mod with my fx loop added.
@@HeadfirstAmpsfor bedroom playing (without a load box or attenuator) is still too loud :D (the PPIMV at low volumes is a bit harsh and theres'e no EL434s distortion... )
@@pedrolourenco2707 I saw a video with the guy who builds TopHat amplifiers (Pete Thorn's channel). He was showing how to set an am up with a PPIMV. He showed how it is implemented in the circuit and how it interacts with the EQ. His instructions: Turn the Treble and Presence DOWN. Dial it in with your EARS and NOT your EYES. I have a hand built JTM 45 amp with a PPIMV and I was setting it with my eyes and it sounded terrible. I turned the Treble and Presence down and it sounded "right" again. Hope this helps you and everyone else who has this sort of MV.
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I am FLOORED at how good that sounds with a few relatively simple mods. You killed it!
Marshall couldn’t build these like this. The Studio Vintage line would sit and rot on the music store shelves.
Thanks. Playing it again today, it really rips at about 8/10 on the treble channel!
@@HeadfirstAmps Are these mods that novice could do relatively easy. I have one brand new in the Box. I've had it a while so I'm not worried about the warranty.
@@jackbyrd4921 I wouldn’t necessarily say a novice, but intermediate with soldering? My experience in the past has been with effects pedal kits and made about 8 or so of those. The two scariest parts for me with the original headfirst mod were: the screws that hold in the main pcb are cheap and strip easily, one of mine totally stripped and I had a really challenging time getting it out, and second - getting the perfect soldering iron temperature to melt the cheap and/or lead-free solder used on the board without burning traces. Other than that everything went pretty smoothly!
@@nates4936I believe he was asking Headfirst.
Good job man. And to think they could sound like this from the factory at the same price - IF they had designers like you.
Lyle! Thanks brother. I still haven’t figured out why they came up with the Origins alongside the Studio series…they should have stuck with the classic circuits and then perhaps had the Vietnamese assembled ones and the UK assembled at different price points. Also, both the Origin and Studio series are built with identical components right down to transformers.
Exactly.
@@HeadfirstAmps The Origin is an original Fender-based circuit from which many other Marshall amps are modded with. That is why it's a pedal taker. You put a Friedman BE-OD in front, and you have a JCM800. You put a Small Box in front and you have a Plexi.
It’s none of those things, but if you like the amp stock then good for you.
@@HeadfirstAmps The Origin is based on a Fender bassman. That is why comparison videos use a Fender bassman. You said you don't know why it is made the way it is, and there is your answer. If it is not that, then what is it?
Bought an Origin 50 and sent it back within 5 Days! I put every pedal through it and NEVER got an actual “Marshall” sound out of it. I cannot believe you made this 20 sound good. I literally had to pay 1/7 the price in shipping to return it. Never shoulda sold my 80’s Jcm 800.
The stock Origin circuit is really a mess. Marshall could have made it more true to it 'origins' as the name implies!
@@HeadfirstAmps agreed. But I LOVE what youve done with it!
Did you try an EQ in the loop? Sounds much better. A low gain Tumnus into a Revv G3 up front, and a 10 band in the loop.
Origin is based on the jtm45. Not the 1959slp. Which many get wrong. That's why you didn't get that "marshall" sound
Did you try turning the master up?
The hot rodded Plexi tone you had with the Les Paul was killer. Thanks for doing the work to achieve these results.☺
I heard that Darkness riff! Nicely done...and the sound of the amp...I picked up an Origin 20 combo recently for my studio so I'll be following suit!
Magic, your going to boost origin sales.
They could have made the Origin sound so much better - and used less components to do it!
OMG….this sounds as good, if not better than the SV20! I can NOT believe you got this sounding THAT good. And, these amps are dirty cheap in the states. The problem though is that, for us newbies, the explanation in the video wouldn’t be enough to buy one and try this on your own. I think I brought it up before in one of your videos. But, this type of mod would be a GREAT live stream for guys that have one who want to get their hands wet with this stuff. It’s incredibly exciting knowing this amp can sound like this, with comparatively little money. But, a bit disappointing, knowing it’s still above a lot of people’s heads. But, you’ve out done yourself, yet AGAIN….. 👍
I would buy two if i could get them setup like this
I gonna agree with this. I recently picked one up used for $300, and I'd love a more step my step tutorial to do this on my own.
@@robertlevasseur8896 Hang in there. I told Jason I’d get him some info on how to get online classes going, quite some time ago, and “life” got in the way. It may seem simple, but there’s quite a lot involved in an online class like this (soldering knowledge, making sure everyone has the same kits, scheduling, what would be charged, time-zones…..and whether or not Jason has the patience and interest to teach newbies, etc, etc). So, hand in there. Hopefully, before the end of the year he’ll have some sort of a prototype class setup to test the waters with this idea (so to speak).
Amazing video. Sounds ABSOLUTELY fantastic gonna give this mod a try. Do you have a written instructions list like the headfirst mod ? It would really help.
Cool. If there is anything unclear in the clip re how to do the mod let me know. I’d consider a follow up clip if needed..
@@HeadfirstAmps Yes, PLEASE do a follow up video. I just posted a similar comment, not just on how jaw-dropping you got this to sound, but that for us newbies still learning this stuff, we’d kneed a bit of hand-holding. I know I’d pay good money to have a live-stream with on on a simply mod on a cheap amp like this. You should consider it. I’m sure a LOT of people would take you up on it, and you’d make a tone of money in the process. 👍
Interesting idea. A live stream to take people through and answer questions etc?
@@HeadfirstAmps Absolutely! Something in-depth. A live stream where you take a cheaper amp like that Origin, and show a mod step by step. We’d all log in, and send our questions via the chat. I can’t remember what company did it (may have been Stew Mack) but there’s a company out there there makes those simple all-inclusive fender circuit amp kits, and they did a live video showing the online class how to put it all together from start to finish. They record the entire thing so the students (or anyone interested) can watch the build as many times as they need. But, they did it with a nice over-head camera like yours. Obviously, they’d buy the mod kit from you, and pay for the class itself. Short of that, they would obviously need the amp, and would need to have basic soldering skills, and you could even do a small intro session to that if you wanted to. But, there are some really cool things you could do (if you have the time, and interest) with the production equipment you already have. With the reputation you’ve built up, and the interest, I think you’d get a LOT of interest in it. You just have to keep in mind that with something Iike that, you have to assume that short of some soldering skills, you’ll be dealing with people who’ve never built, or modded an amp before, so you have to put on you “Amp modding for idiots” hat :-). Think about it….you’d be helping a lot of people, and could do it from your existing studio, with existing equipment, and make some good money. 👍
The mod sounds great and the large box cab on the 1987t looks cool too. Ive been wanting to build a plexi for a while. Always fun to rip an amp on 10.
Coolest mods on the world! Thanks to share all this with humanity! Sound so good and make this amps truly “origins”
What a nice job! It sounds so good! I wonder if you can still get the same nice clean tone after the mod?
That amp have become a complete marvellous beast. Great work waw! Can it be done to the Origin 50 as well? I want to mod mine and that mod sounds amazing!
Yes, the boards are nearly the same as far as this mod goes.
@@HandWiredAmps thank you!
@@HandWiredAmps He mentioned setting up the cathode bias a specific way, I thought the 50 had a fixed bias?
The 50 is fixed bias
This is phenomenal, sounds even better than your 2204-esque mod! Do you think it's possible to tune the circuit to get more into mid-60's JTM territory, or would that require different transformers and rectification?
Thanks! Well, the preamp could definitely be set in that configuration.
@@HeadfirstAmps if only Marshall would make something like a DSL with a bunch of relays to switch between the four sounds we actually want: this circuit with a JTM or JMP preamp, and the 2204 circuit with a "stock" or hotrodded preamp. Maybe they're just allergic to money?
Awesome, I bought my Origin 20 in 2018 few months before returning to Brazil, it has been my baby, thrully workhorse ...love this amp. You created a monster my friend 😂😂😂😂 I'm going to research this. Thanks for sharing. Cheers from Brazil
Cheers!
Nicely done.
I like woolly bass on 10 and can roll off the potentiometer as desired. I would leave the bright channel bypass cap off altogether. You are getting a Van Halen tone. Bravo.
Very cool, better sounding and more versatile than a Studio Vintage 20 and less than 1/2 the cost!
Hard to beat at the price
Disagree
Sounds killer. I like cheap Marshal amps. They’ve been good to me . So have my old peavey Amps. But I never work on them. I just put them up and buy more. 🤷♀️
I swear my phone almost dropped out of my hands... What a FKN SOUND and that's plugged straight IN. No ridiculous Distortion pedals .
Great stuff MATE.. The way a MARSHALL should sound !!😜🤟👍🏻
Straight in!
hello :) the amplifier is well built? have you had any crashes?
Dr. Headfirst: Are these services you provide, or are the changes also published for DIY'er's who know enough to live to tell the tale after doing the work? A friend is picking up a used O20C & if he's lying awake at night thinking he made a mistake...
I'll start out listening to the whole video and taking notes.
Thank you
You know, I heard all your demos, and every time I have to say, this is the best sound so far. This time, I am afraid I have to say the same thing again, this is the best sound from your demos so far, I remember the Alta and the first Origin mod sounded great, but this new mod sounds even better. Speechless. I would record an album with this tone.
Hey Michael, thanks man. New Alta demos yet to come, hopefully you’ll say the same again!
@@HeadfirstAmps I find it hard to believe I'll hear something better than this Origin mod, it's the perfect guitar sound. But I'll be happy to be surprised by the Alta!
I'm not a trained electrician, apart from fascinated by you guys, I'd like to buy an origin 20 and convert it to a plexi, can you buy these extra resistors and caps readily or do you buy a pack of various values, also I understand you need to decharge a capacitor but which one, I fancy trying this mod out myself, what is/are the main points to consider. Cheerz it looks like simple but I know it isn't.
Sounds amazing - Why don't Marshall just do this? They would make a fortune!
well the small plexi it is basically like that (except than for the PPIMV) they differentiate the customer targets ...there is virtually no difference in doing a small plexi, the 20w jcm800 or the origin...to be honest the origin with that weird scaling is the most "complex" of the 3 :D...
@@Valerio_VDF what does any of that mean
I have an origin 50 but I had kt 66 power tubes installed. Now its killer. That said I still find myself using my fenders either my twin reverb 2 or my deluxe reverb 2 ( these are Paul Revera modded amps ) and they rock.
Played a bit of ‘black shuck’. love that!
Hi.. I am currently working on two Marshalls, one MG15 and one Lead 12, both have a blown transformer, do you have any suggestion for a replacement transformer of these two amps.. ? I live in Europe so it would be great with an option that is available here :D. thanks... cheers..
My 1959 plexi.....now sounds like it pops and boils water when i turn it on .....any ideas HELP!
Amazing tones! Is it possible to this mod to the Ultra gain channel on DSL20CR, and completely remove the reverb from the amp and use it for something else?
I like this mod better than the JCM800 type. Partial to that Plexi sound. Great work!
Thats fantastic. How do the DSL heads compare? Are they easy to mod as well or better off getting a Origin to mod? Thanks
Wow! Sounds amazing. I might have missed it, but does the output power switching still work after these mods? Will you be posting instructions to go from the stock amp to this mod, as you have with the previous mod?
The power scaling works great in this configuration. The video steps through all the changes, if anything is not clear let me know and I’ll look at a follow up video.
@@HeadfirstAmps Thank you.
Unbelievable I want this done to my amp so bad!! I own the 20 W and the 50 W I just need to find a tech that can pull this off!!! ..Thank You!!!
Any reason the V2 is bridged underneath the board, could it be done on top?
To make it a Pleix I would just connect it to 1 Celestion 12''...done.
Please please please can you make a step-by-step guide for this? I’d pay for it!
This one builds on the first mod, which is documented
Why did I not get recommendations of this great channel from the TH-cam. Love your awesome videos. I am surprised why you your channel has this low subscribers. You deserve more. Which amp is better value for money Marshall dsl100 or Jetcity. And which is better to mod so that we can get best sound and versatility or should I get something else. Thanks for your awesome videos. And thanks for your suggestion also in advance. Please help
The DSL100 is better than the jet city imho
Genius! You couldv started a whole new career now doing these mods for players.. Your'e gonna be a busy guy.. Sounds awesome
Hi Enjoyed your video/s. Have you every work on the Wangs VT15 Head. It is also suppose to be like a Plexi (but based on a JMC 800 layout?)? Reviews say they are a High End Chinese Quality Amp.
Hi, thanks. I’m not familiar with those amps. I might look it up..
Somebody get me a doctor is my go to riff to test any Marshall
I should have been subscribed to this channel before . Thanks for this much appreciated 👍👍👍
Welcome!
Wow! That is incredible. I have an Origin 20 head and while I like it, I’d LOVE to have these mods done. Being in the states, I’m sure it would cost a fortune to send mine your way and have the work done. Well done!! Thanks for sharing the video.
Take it to a local tech to follow the vid!
Is this mod meant to sound like a stock 69 marshall super lead? I might do this mod to get those first album Boston tones, but I dont exactly want it to sound like a variac
It’s like a variac because the Origin 20 voltages are so very low. If you did the mod to an Origin 50 it will sound and feel more like a 1987 50w plexi.
I just got the Origin20 today, and it's pretty underwhelming. I'm sure when I take some time to set it right it'll sound better, and with pedals too. I'd love to do this though.
I have one of the 50th anniversary white JCM mini stacks that sounds so much better, but it's 1watt so only really good for the house, even though it gets pretty loud.
Any idea what it would take to have a tech do this mod? Thanks
I got mine a few days ago and I’m very happy with it. Just dialed it in with a 2/12 cab, Les Paul with 57 pickups, a strat, and semi-hollow and got some awesome tones. And definitely loud enough to play with my band. Just give it a few days, get a decent cab, lower the treble and add the presence to taste. And you’ll be fine unless you somehow got a dud. Good luck
This sounds killer. I know you posted a schematic for the stock circuit on your website, do you have a schematic for the changes? I want to do most of your mods, but keep the master volume. It'd be easier for me to pick and choose if I could see a diagram.
Scheme wise, it’s a standard 1987/1959 preamp.
Is there an adjustment to make it sound like a standard 69 plexi without the variac sound built in?
The voltages in the 20w are too low. You could get them high enough in the Origin 50 to be like a regular 50w model 1987
why cant it be built correctly the first time
This does not sound like a Marshall Plexi. I have owned many old Marshall’s. There is way too much distortion and compression.
Ever played one set at 90v on a variac and then biased there and then put everything on 10?
Flick of the Switch! That album doesn't get enough love
Agree!
Sounds awesome! Will you be posting the plexi mod instructions on your website? I see the instructions that I think are for your earlier JCM800 mod, but I only see the parts list for the Plexi mod? Thank you!
Did you solve or found out where the bleed problem from pre with input ain at zero and master at full i can hear sound from guitar. Design layout of pcb fault have i heard?
yes, layout fault. The mods fix it.
Just got a 50 and i love it. I may have to get another and have it modded. Gotta say it's my first real amp. I hung around s.s. because one of my favorite home audio amps is the gfa 555. But nothing touches a nice sounding tube amp. I wanted the opposite to be true. Definitely not in the 500 dollar range anyway.
A 'plexi' sound is a vintage non-master Marshall at max volume, nobody wants that ;)
nobody?
What is Marshall's model name for "plexi"? I hear "plexi" all the time but haven't seen that model before.
Plexi = plexiglass front panel, which were featured in the 60’s. However, when people say plexi, they generally mean models 1959 and 1987.
Think I'm going to see if my tech guy can handle this mod! I only paid $400 us dollars for mine new. Sounds so nice! Stupid marshall didn't make it like this in the first place 😒
Hi!I am a great fan of your work!
I live in Brazil, do you think that it's easy find someone here to do this mod? Besides, my amp is a Origin 50h, the process is the same in this case?
It’s the same mod for the Origin50, but the O50 is fixed bias so if doing a PPIMV that will need to be configured a little differently.
If you show the video to a local tech, maybe they can help.
Caso esteja no estado de SP, você pode mandar pro Rodrigo Martins de Marília/SP
Roughly how much did all of the components cost for this mod? I might try to do this myself with my Origin 50.
20 bucks give or take. I’m going to do a parts list for everyone and put it on my website.
@@HeadfirstAmps wow, really? That sounds almost too good to be true! This makes me wonder why Marshall didn’t just put in those components in the first place
I think I want to try this with my 50wt. Is it much different if going for an earlier style plexi like the 68' 1987X?
Does this sound like a standard plexi? I don't know if I want to mod my origin with the old video (JMC800) or this new plexi mod. Im trying to get what sounds most like a standard plexi with those full beefy tones and that bite sound.
This is the closest to a standard plexi of my Origin mods. This sounds like a SV20 now, but with a PPIMV.
@@HeadfirstAmps I when you showed the changes, is that changes to the stock origin or adding onto the JMC800 mod
Since the 20 and 50 both have 2x same power tubes I’d assume the driving of speakers s in loudness is similar?
Bro, the face says it all!
Sounded like The Bronx - 'White Tar' at the start there.
Since it has the power reduction features, it’s changing to the ppimv really noticeable difference?
hey awesome amp and guitar playing excellent headfirst amplification :o) i am. i am was thinking of an origin 50 to mod like this and use for metaL, i am play 8 string metaL bard classicaL kind of ways kind of thrashy, kind of shreddy like and kind of industrial in the way of fear factory and divine heresy. kind of like all styles of metaL really oh well, i run an akai deluxe and clear boost, delay, etc. it sounds like my kind of amp, amps i like are the peavey solid state , crate stealth hybrid, EVH 5150 and EVH 5150 III, and the sig X pittbull vht, i like the bugera i like marshalls although i usually use an eq through them in FX loop, can i mod an origin 50 to sound great and keep or install a nice FX LOOP?
Have you ever worked on the new supro's, specifically the black magick reverb? Its a dark sounding amp i play it with the bass off treble all the way up and its still kinda dark. Is there a mod that can be done that will make it less dark but not really change the sound?
Your links under the video for parts list when used yust send me to headfirst startsite. cant find a partslist for the mods on this.
headfirstamps.com/?page_id=1195
It seems most have lost the point of this amp.
It was never ment to sound like a plexi, although it has a lot of the same qualities.
The Origin was ment to be a peddle platform. But because it has that plexi aura about it everyone want to make it into a one,
That was not what it was designed for.....!
Question: can you get a “less hot rodded” tone with this mod in place? I LOVE this but I’m interested in how much I can dial it back if I wanted to as well. Or is it a resister that I could make switchable from a cleaner to hot rod sorta thing?
Do you plan on creating instructions for this like for the headfirst mod? What would be different between a 20 and a 50?
ooooft now I want me an Origin 20 :O
where can i find on you website the schema for that mod please great video! cheers from france
Sorry, no scheme just the video guide.
Could I use the JHS little black amp box (goes in the FX loop) to crank the master on a stock Origin or I need an atteunator?🤔
Awesome video man! thanks for making it .
Glad you liked it!
Can one remove the master as well to get a straight non-master plexi style circuit?
Yes
Whats the difference between a plexi and a “proper plexi “?
None.
Can I make it so the plate bias change to the power section that happens with the flick of the wattage switch also changes the plate bias of the pre-amp tubes?
Sounds allot like my Marshall Vintage Modern 50Watt
With these mods will it still make for a good pedal platform when needed?
Yes, if you implement the mods per the latest plexi mod vid
Sounds amazing, as soon as I can get a second hand one I'll be sending it your way to mod!
Hello I just got the Origin 20 combo and want swap out the pickups it was a floor model and one tube was dead I got scared but I opened it up and saw a dead tube I put in a cheap tube I had in my tube box and works okay. I would like to know the tubes you put in yours before I order any. Thank You!
JJ’s are reliable and sound fine
Thank you! @@HeadfirstAmps
Does this work with the Origin 20 combo as well?
Yes
:45 🎶 well there’s a love gone down on mine
Suicidal voltage line! 🎶
Hi mate.Is it possible to do this same mod on my Origin 50C please?
Yes, I just did an O50 Plexi mod last week
Can't find the list of material and the instruction on the website anymore.
Could somebody can tell me wgere i can have it?
Thank you
There is a Mods Share button on the DIY page of headfirstamps.com
headfirstamps.com/?page_id=1195
Ok thank you, but in the list, what is the mod should i choose to mod it like in the vidéo?
And is this mod keep the fx loop in place?
If I want to do this mod from a stock Origin 20, should I follow the JCM800 modding guide video and do that mod, then come back here to make the changes for the plexi? I'm not sure if this just adds onto the JCM800 mod, or if I have to remove components from that mod to do this one.
thanks
You can just do the plexi mod, no need to do the 800 mod first
You’re in Australia, are there any Americans you might recommend for doing your mods? They’re excellent. I wish you lived here, because I’d certainly get buy this amp and get you to do my mods. Pure genius my friend, WOW!!!
Yes - per the website
That thing sounds awesome! I was wondering, when you do the plexi mod, how pedal friendly is it, like if I wanted to use something as a boost for leads?
If I used say a 100pF rather than the massive 4700pF, then it would be more pedal friendly.
Man that is KILLER!!!
So tempted to have a go at that
Would these mods all work on the combo as well? Is it the same?
Yes. The combo is identical. I’ll be doing a parts list and will post it to the website.
Awesome. I’ll look forward to it (there are a few combos floating around here in brizzy so when I see one pop up Cheap I’ll get on it. Thanks heaps for all this info
If i send you my origin 50 head how much do u charge to do this mod for me mate?
Email: headfirst.amplification@gmail.com
What a killer channel🌟🌟🌟🌟🌟
Thanks!
Totally agree!
You really know your stuff, Jason! That little amp sounds huge!
hi guys! quick question: which is suitable marshall under 40 w. to get sweetest and mellow tone just for clean sounds?.. i mean looking for to fender tweed territory instead silver type… i find this little beasts nice only when they are pushed up wildly especially sv20 or origin . otherwise nasty harsh tone come out at medium volume…especially w/s.coils , i wouldn’t pair w/v30 speaker every time to sort out…
Jtm45 reissue might be a good option if you can find one.
Marshall plexi just sounds like a distorted mess. this on the other hand is balanced & crisp.
Great video! Wonderful!! I agree with the other commentators. Marshall should make such a version. I have the combo version, which I truly like. However, I must use a pedal with it which isn't needed with your mod.
Great show bro!
Do you have a parts\value list posted somewhere? Id like to get started on this one right away
I haven’t yet, maybe I should do a follow up clip to outline what I used…?
@@HeadfirstAmps a short clip would be great.. or even just a PDF or link. Anything really. Thanks for the reply 👍
@@HeadfirstAmps A PDF of materials req'd would be fantastic! Thanks for sharing this mod with us.
Hello, I have an Origin 20 with a bad Tilt pot... I think it's the pot... when I dial it off of 0 it pops and I get a volume cut compression sound and nothing changes the whole way to 10.... what pot is it ? 250k ? Is it the pot though ?
The Origin 20 uses a 100k tilt, whereas the Origin 50 uses a 1m tilt pot. Might actually be a bad cap - there is a 0.1uF cap there that acts like a bright cap. You could try a little deoxit contact cleaner sprayed into the pot to see if it sorts it.
is the 20 head enough for a loud band? im asking bkz i wouldn't want to get the 50 to keep up w a loud drummer and have to back off on the master ..... at master and gain approx. maxed on the 20 - will it hold up for a proper gig ? thx for the vid, thx for the settings ..
If you are in a 2 guitar band and you need to get your stage volume up and over the rest of the band for leads, then get the 50.
Miiight have to try these in my combo
The combo is the same as the head circuit wise
I highly recommend that you make a discord server. I'd bet tons of people would communicate about these mods on there
I’ve thought about it before, even created one but never did anything with it. I have the DIY Group on Facebook but I realise there are quite a few people that won’t post there because of the whole FB thing. Maybe it’s time to get it going..
My BAD...money 💰💰💰 IS a issue..so Amp plus Any mods..p.s. I'd be using the Amp for a Journey Loverboy Tribute Band I'm in.. Thanks ☮️
The origin is the cheapest way, if you can find someone to mod it…or DIY even better! The PT20 is a better quality amp, component wise, but the O20 can be made to sound great. If I was doing the cover thing I’d go with my 800 mod with my fx loop added.
Even at 5w this amps are loud! I had a class 5 single ended el84 head, heavly moded and it soudned amazing... but too loud!
A PPIMV is a must in a amp like this, if want to play it at any volume
@@HeadfirstAmpsfor bedroom playing (without a load box or attenuator) is still too loud :D (the PPIMV at low volumes is a bit harsh and theres'e no EL434s distortion...
)
@@pedrolourenco2707 I saw a video with the guy who builds TopHat amplifiers (Pete Thorn's channel). He was showing how to set an am up with a PPIMV. He showed how it is implemented in the circuit and how it interacts with the EQ. His instructions: Turn the Treble and Presence DOWN. Dial it in with your EARS and NOT your EYES.
I have a hand built JTM 45 amp with a PPIMV and I was setting it with my eyes and it sounded terrible. I turned the Treble and Presence down and it sounded "right" again. Hope this helps you and everyone else who has this sort of MV.