Where does the JCM900 "MK3" fit it?

Reckless_Life · 11-21-2011, 02:33 AM

Hello,

Regarding the JCM900 series, I know there are Dual Reverb models and SL-X models.
JCM900 Table

But, can someone tell me where the JCM900 "MKIII" fits in?
Is it a re-issue of some sort?

diesect20022000 · 11-21-2011, 02:44 AM

it's meant to be a modified 800 series with the added gain of a nice OD but, it's circuit differs. it's tone IS similar imo though. think of it as an all tube amp with a built in OD pedal.

it's far more sought after than the DR's because if this and similar to the SL-X. the SL-X is closer to the basic circuit but, adds a tube gain stage instaed of diodes for the boost and it's a more darkly voiced amp .

the SL-X is the most sought after but, personaly i would take an MKIII. that and a nice 86 2205/2210 are my two amps of choice that i'm looking for as i type this.

it was alsoa short run from 90-92

SmokeyDopey · 11-21-2011, 08:19 AM

I've tried all 3 models, and I'm with you diessect, the MKIII is the best.
I tried the SL-X yesterday for the 1st time. It was pretty cool, but I think I would stick to the MKIII

kebek · 11-21-2011, 09:30 AM

I played on all 3 of them... I prefer the DR.

LPMarshall hack · 11-21-2011, 09:43 AM

I have a MKIII and I love it. MKIII's are hardly mentioned because they only were produced for a couple of years.

cicone · 11-21-2011, 12:51 PM

My MKIII is a keeper.

diesect20022000 · 11-21-2011, 02:05 PM

Quote:

Originally Posted by LPMarshall hack

I have a MKIII and I love it. MKIII's are hardly mentioned because they only were produced for a couple of years.

werd dude. I'm still whatching for on at a good price right now.

SmokeyDopey · 11-21-2011, 02:07 PM

**** you guys. I want an MKIII now.

Reckless_Life · 11-21-2011, 02:24 PM

Thanks guys, I didn't know where to put the mk3. Maybe I overlooked the Marshall site, where I only found the DR and SL-X in the JCM900 section.

LPMarshall hack · 11-21-2011, 03:28 PM

Quote:

Originally Posted by diesect20022000

werd dude. I'm still whatching for on at a good price right now.

What are they going for these days?

Ken · 11-21-2011, 03:35 PM

Quote:

Originally Posted by LPMarshall hack

What are they going for these days?

$5-600 around here. Forget Fleabay...DR's are asked at stupid prices like $800 and I see them locally at $4-500 all day long. C/L is usually the place to look.

Ken

LPMarshall hack · 11-21-2011, 03:38 PM

Quote:

Originally Posted by Ken

$5-600 around here. Forget Fleabay...DR's are asked at stupid prices like $800 and I see them locally at $4-500 all day long. C/L is usually the place to look.

Ken

Nice. haven't looked in a while. every once in a blue moon, I check ebay and CL just for farts and giggles. I'm never selling mine though. Unless someone wanted to trade with a JMP 2204....

TwinACStacks · 11-21-2011, 03:48 PM

MK III's also glide better.

TWIN

longfxukxnhair · 11-21-2011, 04:01 PM

Quote:

Originally Posted by TwinACStacks

MK III's also glide better.

TWIN

SmokeyDopey · 11-21-2011, 04:06 PM

Quote:

Originally Posted by TwinACStacks

MK III's also glide better.

TWIN

I thought those were the DRs

EastTexas · 11-21-2011, 07:30 PM

To me, all of the JCM900 amps have merit - DR, SL-X, MKIII. I've played through them all, but the only 900 I own is the MKIII. Roll the gain (diodes) back to zero and you have classic JMP Marshall. No BS, just tubes with classic crunch.

rjohns1 · 11-21-2011, 07:59 PM

Quote:

Originally Posted by TwinACStacks

MK III's also glide better.

TWIN

I scrolled through this thread looking for this exact answer. Thanks Twin!

Ken · 11-21-2011, 08:07 PM

Quote:

Originally Posted by SmokeyDopey

I thought those were the DRs

If the glide ratio is an inverse proportion to the quality of the amp, NOTHING will glide better than a DR other than a Peavy.

Ken

50 watt CJ · 11-21-2011, 11:06 PM

The Mk 3 was the 1st run of the 900 series. It had EL 34s whereas the slx and dual reverb had 5881-6l6 power tubes. The Mk3 is basically a 1 chnl amp that had 2 master volumes that you could set differently. It also only had 3 preamp tubes, so you'd get less gain outta these guys compared to the 4 preamp tubes the later 2 900 series amps had. I actually plugged into a MKIII a few days ago in a GC. I didn't crank it enough to enjoy it, but off the bat, was kinda not impressed. It seemed a bit thin and not real ballsy or full. They wanted 599 for it, not bad really. Who knows how much servicing it would need, the knobs were all staticky, the tubes were prob ancient too. I tried a dual reverb 900 once that sounded kinda good. I like that that one gives you seperate gain, volume and reverb for each chnl- alot more versatile. I play a dsl50, a vintage modern2266 and an 84 2205 jcm 800. I would like to add a 900 in someday-why not one of every series right? Amp junkies!!!!!!!!

SmokeyDopey · 11-22-2011, 07:27 AM

Quote:

Originally Posted by Ken

If the glide ratio is an inverse proportion to the quality of the amp, NOTHING will glide better than a DR other than a Peavy.

Ken

Quality? you may not like the sound.. I know what you mean. Its not for everyone.

but they're ****in tanks

I've had mine for about 8 years now... I only took it once to a tech.

JSJ900 · 11-22-2011, 08:47 AM

I love my Mark III. This guy has some a great rundown of it:

Erik's Corner*-*Marshall JCM 900 MkIII Hi Gain Master Volume

dixie hustler · 11-23-2011, 02:22 PM

Hello all. New to the site, first post. I LOVE my MKIII 2500. Did a few things to make her look different then the rest. Let me know what you think. I just Bought a 76 100w Super Lead 4 hole. Its the pre change over I.E it has the toggles and gold piping no corner caps and what not. So the 900 has been taking a rest as of late. lol.

TwinACStacks · 11-23-2011, 10:58 PM

Psssstttt, Dixie. Someone stole two of your power tubes and just left the 2 holes.

TWIN

dixie hustler · 11-24-2011, 12:25 AM

Well I guess that explains why the Damn things a 50watter. Lol. Mystery solved..

Lowlife · 11-24-2011, 12:54 AM

They used the same casing for 50 and 100 watters, or did you just do that yourself?

dixie hustler · 11-24-2011, 01:26 AM

Same for both. The two outer holes have plastic covers over the holes. It's a 1990 900 mkIII, 50 watt. The first year they made them. Had the extra gain diode bypassed. And the bright caps I think there called removed. Great amp tech here near Detroit named Dean Zink did the mods. I also installed blue LED strips hidden in the inside front of the head. That's the blue you see in the pix. Wired to a battery pack and toggle in the rear. Looks much much better in person.

medicjg · 11-24-2011, 07:59 AM

Quote:

whereas the slx and dual reverb had 5881-6l6 power tubes.

The early DRs and SLX came with el34s as well. The mkiii only has 3 preamp tubes but adds additional gain with diodes. Kind of like a 2204 with a built in boost. The mkiii when healthy and the master above 3 is very thick and meaty. I dont understand why they stopped producing them they are a great marshall and certainly holds it own against the others.

HoboMan · 11-24-2011, 12:50 PM

I have a 2501 MKIII 1x12 50 watt combo.
It's a KILLER amp. It's the perfect Grab & Go combo. It's lighter & smaller than my JCM800 4210 combo and sounds every bit as good.
You can plug in an extension cab if you want.

I sold my DSL50 after getting the MKIII. Sounded a lot better to my ears.
Here's a pic with my MKIII sitting on top of my JCM800. You can see how much smaller it is. It still sound huge.
It's all I use at rehearsal.

avivoni · 11-25-2011, 03:24 AM

the jcm 900 MK III is on my wishlist

Adrian R · 11-25-2011, 08:01 AM

Quote:

Originally Posted by HoboMan

I have a 2501 MKIII 1x12 50 watt combo.
It's a KILLER amp. It's the perfect Grab & Go combo. It's lighter & smaller than my JCM800 4210 combo and sounds every bit as good.
You can plug in an extension cab if you want.

I sold my DSL50 after getting the MKIII. Sounded a lot better to my ears.
Here's a pic with my MKIII sitting on top of my JCM800. You can see how much smaller it is. It still sound huge.
It's all I use at rehearsal.

I did the same comparison too..that is compare the 2500 to a DSL 50. Both amps sound great, but are very different. The MK3 to me was brighter, with more focused upper mids and better defined low frequencies. However, it didn't sound quite as warm, didn't have as much gain, and no where near the clean sound. Being more versitle, the DSL had deeper extended low frequencies as well, and with the deep switch, made it great for jamming bedroom volume levels. The DSL also imo seemed a bit more forgiving to your pick attack, making actually easier to play..strange..almost like a solid state amp. The MK3 has its own, very original vibe though..making it unique and worthy of any true Marshall lover's affection.

I luv both of them!

11-21-2011, 02:33 AM	#1 (permalink)
Reckless_Life Senior Member Join Date: Nov 2011 Posts: 703	Where does the JCM900 "MK3" fit it? Hello, Regarding the JCM900 series, I know there are Dual Reverb models and SL-X models. JCM900 Table But, can someone tell me where the JCM900 "MKIII" fits in? Is it a re-issue of some sort? __________________ 1984 Marshall JCM 800 2203 1984 Marshall JCM 800 2204C 1988 Marshall JCM 800 2205 1990 Marshall JCM 800 2210 2007 Marshall JCM 800 2203KK Peavey Bandit 112S TT (1st gen) Peavey 5150

11-21-2011, 02:44 AM	#2 (permalink)
diesect20022000 Senior Member Join Date: Sep 2010 Posts: 16,631	Re: Where does the JCM900 "MK3" fit it? it's meant to be a modified 800 series with the added gain of a nice OD but, it's circuit differs. it's tone IS similar imo though. think of it as an all tube amp with a built in OD pedal. it's far more sought after than the DR's because if this and similar to the SL-X. the SL-X is closer to the basic circuit but, adds a tube gain stage instaed of diodes for the boost and it's a more darkly voiced amp . the SL-X is the most sought after but, personaly i would take an MKIII. that and a nice 86 2205/2210 are my two amps of choice that i'm looking for as i type this. it was alsoa short run from 90-92 cicone and 61rocker like this.

11-21-2011, 08:19 AM	#3 (permalink)
SmokeyDopey Senior Member Join Date: Mar 2011 Location: Argentina Posts: 8,304	Re: Where does the JCM900 "MK3" fit it? I've tried all 3 models, and I'm with you diessect, the MKIII is the best. I tried the SL-X yesterday for the 1st time. It was pretty cool, but I think I would stick to the MKIII __________________ F u c k & S h i t Inc. Last edited by SmokeyDopey; 11-21-2011 at 12:56 PM.

11-21-2011, 09:30 AM	#4 (permalink)
kebek Senior Member Join Date: Mar 2009 Posts: 695	Re: Where does the JCM900 "MK3" fit it? I played on all 3 of them... I prefer the DR.

11-21-2011, 09:43 AM	#5 (permalink)
LPMarshall hack Senior Member Join Date: Nov 2009 Location: San Diego, CA Posts: 4,272	Re: Where does the JCM900 "MK3" fit it? I have a MKIII and I love it. MKIII's are hardly mentioned because they only were produced for a couple of years. cicone likes this. __________________ 2500 1960BC Peavey Vypyr 15 1989 LP Custom Piece of crap Epi LP-100

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11-21-2011, 12:51 PM	#6 (permalink)
cicone Senior Member Join Date: Apr 2009 Location: north Florida Posts: 304	Re: Where does the JCM900 "MK3" fit it? My MKIII is a keeper. __________________ Marshall JCM900 MKIII 2500 Marshall 1960AV Vintage 30's Fender Hot Rod Deluxe America Standard Strat MIM Fat Strat Epiphone Les Paul Standard Alvarez-Yairi DY-58(9 string) Roland MicroCube Fulltone OCD 1.4 Fulltone mini Deja'Vibe MXR Carbon Copy MXR 10 Band EQ THD Hot Plate Dunlop Cry Baby Dunlop DC Brick Don't ask about the stereo equipment!

11-21-2011, 02:07 PM	#8 (permalink)
SmokeyDopey Senior Member Join Date: Mar 2011 Location: Argentina Posts: 8,304	Re: Where does the JCM900 "MK3" fit it? **** you guys. I want an MKIII now. audiochains and medicjg like this. __________________ F u c k & S h i t Inc.

11-21-2011, 02:24 PM	#9 (permalink)
Reckless_Life Senior Member Join Date: Nov 2011 Posts: 703	Re: Where does the JCM900 "MK3" fit it? Thanks guys, I didn't know where to put the mk3. Maybe I overlooked the Marshall site, where I only found the DR and SL-X in the JCM900 section. __________________ 1984 Marshall JCM 800 2203 1984 Marshall JCM 800 2204C 1988 Marshall JCM 800 2205 1990 Marshall JCM 800 2210 2007 Marshall JCM 800 2203KK Peavey Bandit 112S TT (1st gen) Peavey 5150

11-21-2011, 07:30 PM	#16 (permalink)
EastTexas Member Join Date: Jul 2011 Posts: 30	Re: Where does the JCM900 "MK3" fit it? To me, all of the JCM900 amps have merit - DR, SL-X, MKIII. I've played through them all, but the only 900 I own is the MKIII. Roll the gain (diodes) back to zero and you have classic JMP Marshall. No BS, just tubes with classic crunch. sccloser, medicjg and JSJ900 like this.

11-21-2011, 11:06 PM	#19 (permalink)
50 watt CJ Junior Member Join Date: Nov 2011 Location: Denver, Co Posts: 24	Re: Where does the JCM900 "MK3" fit it? The Mk 3 was the 1st run of the 900 series. It had EL 34s whereas the slx and dual reverb had 5881-6l6 power tubes. The Mk3 is basically a 1 chnl amp that had 2 master volumes that you could set differently. It also only had 3 preamp tubes, so you'd get less gain outta these guys compared to the 4 preamp tubes the later 2 900 series amps had. I actually plugged into a MKIII a few days ago in a GC. I didn't crank it enough to enjoy it, but off the bat, was kinda not impressed. It seemed a bit thin and not real ballsy or full. They wanted 599 for it, not bad really. Who knows how much servicing it would need, the knobs were all staticky, the tubes were prob ancient too. I tried a dual reverb 900 once that sounded kinda good. I like that that one gives you seperate gain, volume and reverb for each chnl- alot more versatile. I play a dsl50, a vintage modern2266 and an 84 2205 jcm 800. I would like to add a 900 in someday-why not one of every series right? Amp junkies!!!!!!!!

11-22-2011, 08:47 AM	#21 (permalink)
JSJ900 Senior Member Join Date: Sep 2011 Posts: 343	Re: Where does the JCM900 "MK3" fit it? I love my Mark III. This guy has some a great rundown of it: Erik's Corner-Marshall JCM 900 MkIII Hi Gain Master Volume

11-24-2011, 12:25 AM	#24 (permalink)
dixie hustler Senior Member Join Date: Nov 2011 Location: lake Orion, Michigan Posts: 436	Re: Where does the JCM900 "MK3" fit it? Well I guess that explains why the Damn things a 50watter. Lol. Mystery solved..

11-24-2011, 12:54 AM	#25 (permalink)
Lowlife Senior Member Join Date: Dec 2010 Location: Copenhagen, Denmark Posts: 897	Re: Where does the JCM900 "MK3" fit it? They used the same casing for 50 and 100 watters, or did you just do that yourself? __________________ JVM 410H (Mods: Compression reduction, 3rd stage bias, negative feedback, Plexi, OD2 > JCM800, clean > Blackface) JCM1 combo Class 5 - modded Valvestate VS8080 JCM 900 1960A cab with G12-65's and G12T-75 in X-pattern THD hotplate ---------------------------------- Gibson LP Standard Faded Epiphone Casino, John Lennon edn. Fender stratocaster, Richie Sambora edn. (mex) Kramer Custom Pacer II

11-24-2011, 01:26 AM	#26 (permalink)
dixie hustler Senior Member Join Date: Nov 2011 Location: lake Orion, Michigan Posts: 436	Re: Where does the JCM900 "MK3" fit it? Same for both. The two outer holes have plastic covers over the holes. It's a 1990 900 mkIII, 50 watt. The first year they made them. Had the extra gain diode bypassed. And the bright caps I think there called removed. Great amp tech here near Detroit named Dean Zink did the mods. I also installed blue LED strips hidden in the inside front of the head. That's the blue you see in the pix. Wired to a battery pack and toggle in the rear. Looks much much better in person.

11-24-2011, 12:50 PM	#28 (permalink)
HoboMan Senior Member Join Date: Jun 2009 Location: Wisconsin Posts: 421	Re: Where does the JCM900 "MK3" fit it? I have a 2501 MKIII 1x12 50 watt combo. It's a KILLER amp. It's the perfect Grab & Go combo. It's lighter & smaller than my JCM800 4210 combo and sounds every bit as good. You can plug in an extension cab if you want. I sold my DSL50 after getting the MKIII. Sounded a lot better to my ears. Here's a pic with my MKIII sitting on top of my JCM800. You can see how much smaller it is. It still sound huge. It's all I use at rehearsal. medicjg likes this.

11-25-2011, 03:24 AM	#29 (permalink)
avivoni Senior Member Join Date: Dec 2010 Posts: 1,320	Re: Where does the JCM900 "MK3" fit it? the jcm 900 MK III is on my wishlist

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