JCM 800 2204 or 2205?

keano12

New member
Any issues with the FX Loop?

Do they sound the same?

Will the power tubes get worked more since they are 50w heads nd not 100?

thanks
 
Re: JCM 800 2204 or 2205?

i like the 50w marshalls better since they break up earlier and seem to have a touch more compression. the fx loops in those amps arent great, they work but its pretty old school. if you really plan on using the fx loop alot i might have some one clean it up for ya.
those two amps dont sound that much the same. the 2204 is one channel and kinda plexi like where the 2205 has two channels and much more gain on tap at a lower volume, the 2205 has reverb as well. both a good sounding amps, just different.
 
Re: JCM 800 2204 or 2205?

The 'verb on the 2205 is really crappy sounding, but the amp itself is classic metal. On amps that old you will want a tech to check the amp out to make sure the main board isn't warped too bad, as well as check the power caps and internal connections.
 
Re: JCM 800 2204 or 2205?

A 2204 with an effects loop?? Am I missing something? Like maybe 2 jacks on the back of mine? :eek13:
 
Re: JCM 800 2204 or 2205?

Zerberus said:
A 2204 with an effects loop?? Am I missing something? Like maybe 2 jacks on the back of mine? :eek13:
That's what I've been trying to figure out all day. :chairfall Damn meds cloud my mind and can't think straight. :6:

The only single channel JCM800 that has an effects loop that I know of is the 2203X, which is a reissue.
 
Re: JCM 800 2204 or 2205?

i never owned a 2204 that i can remember, but the fx loop on the 2205 isnt all that good
 
Re: JCM 800 2204 or 2205?

keano12 said:
Any issues with the FX Loop?

Do they sound the same?

Will the power tubes get worked more since they are 50w heads nd not 100?

thanks

No, they do NOT sound the same. An older 2204 (Vertical inputs built between 1976 & 1983) will sound much warmer and bigger due to it's circut. Sometime in 1984/85 Marshall added an effects loop to the 2204. Regardless of whether it's a 2204 or 2205, the effects loop will suck tone, avoid those if you can.

Yes, the tubes in a 50 watt get more use than a 100 watt head, that's why 50s break up earlier. And before anyone posts some BS about the 50 watt output transformer, please remember, 2204s DO NOT NEED A TRANSFORMER UPGRADE!! I don't know how the idea that a 2204 has a bad transfomer got started, but it's total BS! So, your best bet for classic Marshall tone at it's best is a vertical input 2204 or 2203.

Cheers,

CJ
 
Re: JCM 800 2204 or 2205?

Dam i still need a tech to look at my 2204.... I want that beast a singing by summer.....
 
Re: JCM 800 2204 or 2205?

Usurper666 said:
....Sometime in 1984/85 Marshall added an effects loop to the 2204. Regardless of whether it's a 2204 or 2205, the effects loop will suck tone, avoid those if you can. .....

Are you sure of this?? I´ve seen a few 2203s and 2204s w/ horzontal Inputs, but can´t recall ever seeing a loop, nor do the schematics show one....

MIne is an ´81 so I can´t just turn my amp around and look in this case.... but it strikes me as odd...:eek13:
 
Re: JCM 800 2204 or 2205?

Zerberus said:
Are you sure of this?? I´ve seen a few 2203s and 2204s w/ horzontal Inputs, but can´t recall ever seeing a loop, nor do the schematics show one....

MIne is an ´81 so I can´t just turn my amp around and look in this case.... but it strikes me as odd...:eek13:
Same here, man. I'm looking at a 2204 schematic from 1988 and there is no indication of an effects loop on it. The split channel amps had a loop though, that I know for a fact. The only way an effects loop got on one of the Master Volumes (2203 or 2204) was if it was modded by somebody.
 
Last edited:
Re: JCM 800 2204 or 2205?

Zerberus said:
Are you sure of this?? I´ve seen a few 2203s and 2204s w/ horzontal Inputs, but can´t recall ever seeing a loop, nor do the schematics show one....

MIne is an ´81 so I can´t just turn my amp around and look in this case.... but it strikes me as odd...:eek13:

Yes, I've seen a few in stores and they had what looked like a factory effects loop. If it was a mod it was done very, very well, but they all looked exactly alike so I would say it's a factory loop.

Cheers,

CJ
 
Re: JCM 800 2204 or 2205?

I've never seen a 2203/4 with a factory loop and my 1984 2203 vert doesn't have one.
 
Re: JCM 800 2204 or 2205?

Robert S. said:
I've never seen a 2203/4 with a factory loop and my 1984 2203 vert doesn't have one.

If your amp has vertical inputs it can't be an 84, they went horizontal in 1983.

Cheers,

CJ
 
Re: JCM 800 2204 or 2205?

Usurper666 said:
Yes, I've seen a few in stores and they had what looked like a factory effects loop. If it was a mod it was done very, very well, but they all looked exactly alike so I would say it's a factory loop.

Cheers,

CJ

AAAH, that explains it.... THe ones in stores are reissues, the aforementioned 2203x. ;)

Usurper666 said:
If your amp has vertical inputs it can't be an 84, they went horizontal in 1983.

Cheers,

CJ

I´m pretty sure that the switch didn´t happen on 1.1.1984 but a few months later, the first few weeks of not months of ´84 were still the exact same amp as the ´83s ;)
 
Re: JCM 800 2204 or 2205?

Zerberus said:
AAAH, that explains it.... THe ones in stores are reissues, the aforementioned 2203x. ;)

No, this was years ago before the reissue, and they were 2204s, NOT 2203s.

Cheers,

CJ
 
Re: JCM 800 2204 or 2205?

I´ll see if I can dig up the service Diagrams somewhere, even though the loops are crap (even on the RI IMO) it would be interesting to know what exactly went down here... ;)
 
Re: JCM 800 2204 or 2205?

I´m pretty sure that the switch didn´t happen on 1.1.1984 but a few months later, the first few weeks of not months of ´84 were still the exact same amp as the ´83s

They went horizontal in 1983. By 1984 they had already been horizontal for months. The vertical inputs were changed to horizontal in early 1983, look it up.

Cheers,

CJ
 
Re: JCM 800 2204 or 2205?

If it was not a reissue and had an effects loop, it was modded. Plain and simple.

Every authoritive place I've gotten information from on the 800 series says they changed to horizontal inputs closer to 1985. Legendarytones.com is one of the places. The ultimate say-so is what it says in the Marshall Amp Book.
 
Re: JCM 800 2204 or 2205?

ErikH said:
If it was not a reissue and had an effects loop, it was modded. Plain and simple.

Every authoritive place I've gotten information from on the 800 series says they changed to horizontal inputs closer to 1985. Legendarytones.com is one of the places. The ultimate say-so is what it says in the Marshall Amp Book.

I have the History of Marshall Book, it doesn't specify. I know I have seen 83 & 84 2204s with horizontal inputs, I'm positive the change took place in 1983. Legendary Tones is a great site but if they say the inputs went horizontal in 85 they are mistaken.

Also, check out Ebay, every 2204/2203 head with horizontal inputs is 84 or later.

Cheers,

CJ
 
Last edited:
Re: JCM 800 2204 or 2205?

I've owned two 2203's: one from '82 (vertical inputs) and one from '86 (horizontal inputs). Neither had an effects loop but the '82 did sound better. Lew
 
Back
Top