I don't know... What'd y'all think? Sell/trade my JCM 900 DR for Origin 50?

Whatizitman

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I still have my original 4102. It’s the 100 watt 2x12 combo. It’s still probably my all time favorite amp. I bought it new. But it’s pretty much un-useable for my gigs these days. I got to use it for one gig last year. Big outdoor show. Big enough that I could tell the stage crew and FOH guy to just deal with it. And the steel player was throwing eye daggers at me the whole show. It was glorious. But yeah, it’s not a club amp.

Truthfully I don’t even wanna carry it anymore. It’s 10lbs heavier than a TRRI. It’s just a beast, and not necessary for todays stages and PA’s. But holy crap, I cannot tell a lie, it’s just so much fun once in a while.
LOL yup.
keep the 900
Yup.

I let the GAS out a little last night, and just played. It's a good amp. I love the clarity and note definition. Yeah, it sounds like a big pedal at low volumes. But it's a good big pedal, made better when combined with another good pedal like my Rat.

I'd be using drive pedals with an Origin. I use them with Fenders. Sometimes there's a point where hunting for the right amp is diminished returns. Love The One You're With.

I won't be playing live electric guitar any time soon. Not regularly, anyway. So I don't need to lug it and an cab around. I prefer big amps at home, anyway. So it's not going anywhere for now. All good.

Phew. Worst case of GAS I've had in a while. Glad I got through it before I did something dumb. 😳
 

marc2211

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I had a DSL20CR when they came out a few years ago - I hated it, and it was gone in 3 months. Insipid. I swapped it out foran Origin 20 head (v30 cabinet) - it was ok, but nothing in the way of crunch without a selection of pedals.

I was given a Silver Jubilee (mini jubilee) with a 2x12 just after, which showed what the other amps should have been. I love it!

I also now have a Blackstar HT20R Mkii. Does everything the first 2 amps didn't, and is the amp which covers the most ground, and gets all the play time.
 

KC

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Well, while you're recovering, why not set aside a piggybank fund for an eventual Origin? The 20-watt combo has been spotted in the wild for under $500, and it's a great sounding little amp, especially with a Greenback 10 swapped in. And the 50 head can be had for the same money, a little stiffer than the 20 but a pretty great amp. Not either / or but both / and!
 

drmordo

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Definitely be sure you like the Origin's sound. They are very different beasts. I ever never played thru a JCM that I liked at all. I own two Origin combos (20C and 50C) and I love them. I'll probly end up buying a 20H and 5C as well.
 

Whatizitman

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Well, while you're recovering, why not set aside a piggybank fund for an eventual Origin? The 20-watt combo has been spotted in the wild for under $500, and it's a great sounding little amp, especially with a Greenback 10 swapped in. And the 50 head can be had for the same money, a little stiffer than the 20 but a pretty great amp. Not either / or but both / and!

I might. But I'm a one-in and one-out type of guy when it comes to amps. OK really I'm just a big cheapskate. If my PA100 mod project works out ok in the end, I will reconsider selling/trading the 900 for something else. But it may not be another amp. I'm not banking on that, though. It's a huge mod project (for me), and not likely to ever be production level, if you catch my drift.

900 is staying put for now.
 

Whatizitman

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Another road one can take for under 1,000 as a home player:


Just... not quite there yet. I love big tube amps. If playing guitar were the only focus of my playing (or making money playing), it'd be a no brainer. But I like tube amps. I like playing them. I like smelling them. I like working on them. I will be buried with a tube amp. I play electric guitar in part so I can play tube amps. :cool:
 
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Whatizitman

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Definitely be sure you like the Origin's sound. They are very different beasts. I ever never played thru a JCM that I liked at all. I own two Origin combos (20C and 50C) and I love them. I'll probly end up buying a 20H and 5C as well.


Right. I like early JCMs and Plexis. I will make sure I would play a origin 20/50 with a cab before I ever purchase. Sometimes the GAS clouds my judgement. But I'm more clear headed today. o_O
 

PCollen

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I traded into a 900 dual reverb 50 watt head last year, and am on the fence about it. I knew what I was getting into when I got it, tubeless front end and all.
I suggest you go to the Dr. Tube website (below) and review the JCM900 schematics of the various versions. There were two ECC83 tubes in the pre-amp. It was not a tubeless pre-amp unless that change has come about in much more recent versions.


After some thought about it I think the issue at the time was that, along with the ECC83 tubes in the JCM900 pre-amp, there were I.C's and diodes in the signal path. That REALLY put off many Marshall aficianados ...

I had a JCM900 HGDR , Model 4501 50W combo years ago..I never did bond with it, and sold it . The clean tone was not that good, and the distortion buzzy....could very well have been the combo format. The Fender Blues Jr. I bought new in 1997 had a better clean tone.
 
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Whatizitman

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I suggest you go to the Dt. Tube website (below) and review the JCM900 schematics of the various versions. There were two ECC83 tubes in the pre-amp. It was not a tubeless pre-amp unless that change has come about in much more recent versions.


After some thought about it I think the issue at the time was that, along with the ECC83 tubes in the JCM900 pre-amp, there were I.C's and diodes in the signal path. That REALLY put off many Marshall aficianados ...

I had a JCM900 HGDR , Model 4501 50W combo years ago..I never did bond with it, and sold it . The clean tone was not that good, and the distortion buzzy....could very well have been the combo format. The Fender Blues Jr. I bought new in 1997 had a better clean tone.

Yeah, I've gone over the schematics a lot. It's a convoluted mess. But it's more or less clear that a bulk over half of the tube triodes being used in the preamp (before PI) are not for amplification. And certainly not cascaded, and do not constitute a true 2203/4-ish "cold" clipping dynamic. Well, V1A and V1B are kinda sorta typical of a Marshall JCM style V1. It's everything up to that point (essentially a built in drive pedal preceding first tube stage), and lack of "warm" triode amplification stage and tube cathode follower after that make it both unique and "hybrid" for lack of a better term.


But that's really moot if a player likes what the amp does, anyway. So I try to stay out of the "purist" debate on 900s. A quick google will bring up decades of forum posts on it. My OP was not with the intention of dredging that all up. It's a good, reliable, optimal for live use and roadworthy amp. And as often said about the amp, when it's cranked and the output stage does its thing, the preamp clipping becomes less salient to the tone and feel. At the end of the chain is a big iron tube output cannon.

EDIT: Nope. Scratch that again. V1 is one amplification stage, and a cathode follower. It's basically like Marshall took out the first tube and replaced it with split channels of various op-amps, diodes, and LEDs for preamp and clipping. V2A is a loop buffer, and V2B is either amplification or part of reverb recovery. That's unclear to me, particularly since the next circuit is Opamps for the masters(?). What a mess LOL.
 
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PCollen

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Yeah, I've gone over the schematics a lot. It's a convoluted mess. But it's more or less clear that a bulk over half of the tube triodes being used in the preamp (before PI) are not for amplification.
If not for signal amplification, please explain what function you think the V1a, V1b, V2a, and V2b stages perform in the pre-amp section of a JCM900.
 

PCollen

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EDIT: Nope. Scratch that again. V1 is one amplification stage, and a cathode follower. It's basically like Marshall took out the first tube and replaced it with split channels of various op-amps, diodes, and LEDs for preamp and clipping. V2A is a loop buffer, and V2B is either amplification or part of reverb recovery. That's unclear to me, particularly since the next circuit is Opamps for the masters(?). What a mess LOL.
Give it up, you are totally off base and need to do some homework ....hint: the ECC83 stages labeled as V1a/b and V2a/b in the JCM900 perform the same functions as they did in the JCM800 and it hasn't anything to do with reverb recovery.


But the point made is that you are totally incorrect to say that the JCM900 amplifiers have a "tubeless front end", i.e pre-amp. I could care less about the remainder of your OP.
 

Whatizitman

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Give it up, you are totally off base and need to do some homework ....hint: the ECC83 stages labeled as V1a/b and V2a/b in the JCM900 perform the same functions as they did in the JCM800 and it hasn't anything to do with reverb recovery.


But the point made is that you are totally incorrect to say that the JCM900 amplifiers have a "tubeless front end", i.e pre-amp. I could care less about the remainder of your OP.

Ok. Like I said, this has been hashed over and over for decades now. V1A is one amplification stage (I assume), V1B is a cathode follower. Before that is opamps and various diodes for clipping, depending on the channel. It’s not set up the same as an 800, after the opamp stages. But you’re correct that it’s not “tubeless”. Otherwise, I’ve said what I said about the circuit, correct or no. And I have nothing else.

Oh hell. Might as well piss off everyone else here while I’m at it….

….I sold the JCM900. But won’t be replacing it with an Origin. Not right now, anyway. Another deal came up and I was out-GAS’d.

I’ll see myself out now. 🤗
 




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