jcm 900

Discussion in 'Marshall Amps' started by chrispunx, Dec 29, 2011.

  1. chrispunx

    chrispunx New Member

    Joined:
    Feb 10, 2010
    Messages:
    99
    Likes Received:
    11
    Location:
    utica, ny
    What's the difference between the 2100slx and the 4100? Other than the clipping diode. I'm interested in getting one. I like that the slx has no diodes and instead has an extra pre amp tube.
     
  2. demonufo

    demonufo New Member

    Joined:
    Oct 23, 2010
    Messages:
    2,211
    Likes Received:
    254
    Location:
    defunctprofilesville
    Dual Reverb and SLX are VERY different amp circuits. The dual reverb can be really bright and rip heads off in the wrong hands.
     
    diesect20022000 likes this.
  3. Adrian R

    Adrian R Well-Known Member

    Joined:
    Jan 28, 2009
    Messages:
    5,217
    Likes Received:
    2,875
    Location:
    Far North Chicago Burbs'

    Hey Man..

    The 4100 is a 100w, dual channel amp with reverb, also know as the 'Dual Reverb' head. The SLX 2100 'MK4' is a SINGLE channel 100w head with no reverb and footswitchable master volume control. This allows you to have a dedicated rhythm and lead volume that can be changed on the fly with a footswitch. Its really a slick system. Other differences include diodes in the 4100 in order to achieve more gain. The SL-X uses an additional 12AX7 to achieve the higher gain. I've owned them both...and liked both of them. However, my favorite of the entire 900 series is the 'MK3' 2100/2500 (100w/50w), in which was the predecessor to the 'MK4' SL-X. It facilitated the usage of diodes as well to achieve the enhanced gain. I believe it had the greatest tone out of all the 900 series. Sounds allot like a 800 with greater gain, or like a stock 800 boosted with a tube screamer. Hope this helps. You know though, I thought I would never say this, but a properly tuned DSL100 sounds better then all of the 900s, at least to my ears anyway, and can be purchased in some cases CHEAPER then many of the 900 series amps.
     
  4. medicjg

    medicjg Well-Known Member

    Joined:
    Sep 4, 2010
    Messages:
    1,074
    Likes Received:
    579
    Location:
    Midwest
    No disrespect but IMO the DSL does not sound better than a mkIII or a properly tuned 4100. The DSL is a fine platform and more versatile. I have never thought about looking back since I sold my DSL and picked up a couple 900s. Just goes to show how perspectives can differ.
     
    BigMacFullerton likes this.
  5. demonufo

    demonufo New Member

    Joined:
    Oct 23, 2010
    Messages:
    2,211
    Likes Received:
    254
    Location:
    defunctprofilesville
    Hmm, I'm inclined to agree with Adrian myself - especially about the Master Mk III JCM900. I still prefer a LATER DSL over all of them (with a couple of mid tweaks), but none of these amps are to my tastes in all honesty, and to get them approaching my tastes, the DSL is the closest in standard form. Which is odd, because I prefer my amps a LOT simpler usually.
     
  6. Adrian R

    Adrian R Well-Known Member

    Joined:
    Jan 28, 2009
    Messages:
    5,217
    Likes Received:
    2,875
    Location:
    Far North Chicago Burbs'
    I hear ya dude...900s are SUPER TIGHT..when tuned right...very clear with great distortion definition. Only problem, which really isn't that big, is that you HAVE to address the FX loops..running the loops empty really impedes the sound of the amp..but simply installing a patch cord or eq/BBE and they improve tonally immensely. Another thing to is that their tone is very focused and directional. If you stand in front of your cab while your playing at a gig volume or louder, that/them bastards will literally cut you in half, and this is true for the entire series and I have owned them all. Don't get me wrong..the 900s are kick-ass BUT...I do like the DSLs more. They are really touchy in the bias department..meaning you HAVE to get the tubes matched very closely in order for the amp to stay tight..but when you do, they have more gain..and are warmer. They also 'feel' better..smoother and a tad bit more forgiving..plus you do not have to do anything in the loop leaving it empty if need be..The 900s were almost to articulate... I loved my 900s, but I'm a DSL convert..
     
  7. Ken

    Ken Well-Known Member

    Joined:
    Feb 24, 2009
    Messages:
    9,935
    Likes Received:
    3,116
    Location:
    Arlington Heights, IL
    My local C/L today has a 4100 for $450, and another one at $800. Go figure. There's a DSL 100 for $550 as well.

    Ken
     
    jvm210guy likes this.
  8. alvagoldbook

    alvagoldbook New Member

    Joined:
    Dec 13, 2011
    Messages:
    284
    Likes Received:
    26
    For punk rock, which I'm guessing you're interested in judging from your handle, any JCM 900 will sound more authentic to punk rock tone than a DSL. If you're into more of a street punk type sound (US Bombs, UK Subs), then a JCM 800 is the way to go. Either the 2203 or the 2210 two channel amp.

    If there's a used gear shop near by and you can find both amps, try them both out and just trust your ears. A lot of people give the dual reverb a lot of shit for having diodes, but I love their sound. Just remember to keep the verb dialed down to zero.

    The Ramones in their later years used an SL-X, but also included a plexi in their stage set up. A lot of the early NYC punk bands used plexis over JMP's. Bad Religion uses a combination of Mesas Dual Recs and Silver Jubilees. And Rancid uses DSL's. Just something for a frame of reference.
     
    BigMacFullerton likes this.
  9. chrispunx

    chrispunx New Member

    Joined:
    Feb 10, 2010
    Messages:
    99
    Likes Received:
    11
    Location:
    utica, ny
    Yeah going for a discharge, disclose, framtid type of sound. Extremely distorted. And extremely heavey.
     
  10. tresmarshallz

    tresmarshallz Well-Known Member

    Joined:
    Oct 31, 2008
    Messages:
    1,278
    Likes Received:
    364
    I regularly jam with a guy who has a DR and I have an SL-X. The SL-X is way warmer and fatter, and the DR is a much tighter/harder sound.

    They are both old reliable, distinct sounding marshalls. I think they both have an appealing organic/harmonic sound (yes even the DR).
     
    medicjg likes this.
  11. alvagoldbook

    alvagoldbook New Member

    Joined:
    Dec 13, 2011
    Messages:
    284
    Likes Received:
    26
    Discharge used 800's, and I'm pretty sure Disclose used SL-X's. I think a 800, 2100, 4100, or SL-X will all suit your purposes. A DSL will get you similar tones to some of Disclose's heavier stuff, but you'll lose some of the raw organic bite 900's have. For the lack of a better term, the DSL will sound more "over-produced".
     
  12. medicjg

    medicjg Well-Known Member

    Joined:
    Sep 4, 2010
    Messages:
    1,074
    Likes Received:
    579
    Location:
    Midwest
    [ame=http://www.youtube.com/watch?v=2Efqj3K3gLA&context=C3a480b7ADOEgsToPDskJBbqwse5Lb_EpKLW3qrFri]A pair of JCM 900s MKIII and DR thats modified. - YouTube[/ame]


    I apologize to those that have already seen this clip. The master vol on the DR was at 2 and the mkIII was on 3. The volume was just a bit above bedroom level. But def a very manageable volume. I substitute the mkIII with a 2205 at times. I realize that this is a ridiculous amount of gain but I could never manage to get that much gain out of a DSL when I used it in configuration with either of these amps. I guess my whole point in chiming in was to point out that the 900s are great amps. You may play a dsl and like it better they are certainly good amps. I was just able to dial the tone that I like with the 900s instantly while the year I had a dsl i spent the whole time tweaking rolling tubes and performing mods and still wasnt able to get the tone I was after.I guess I could of had a dud too. Best thing is to play as many amps as possible and make up your own mind. I have had amps that I didnt care for simply plug it in to a differnt cab and loved it. As far as trashing an amp because it has clipping diodes is a bunch of shit.
     
    krudler, BigMacFullerton and p90strat like this.
  13. p90strat

    p90strat Member

    Joined:
    Oct 15, 2011
    Messages:
    82
    Likes Received:
    28
    Location:
    U.S.A.
    For what ever it's worth, I have a 50 watt SL-X and a 50 watt Dual Reverb and I love them both. They both are running 6L6GC's and sound fat and tight with nice bottom. Right now since i have only the one cab, a 1960AV mono/stereo I'm running both heads into the stereo cab to each stereo 8 ohm side of the cab. I use a Morley Quad Box and switch between two strats and two heads. I tuned to SL-X for high gain to liquid metal and the dual reverb clean and chime on channel one and crunch to smash on the drive channel. True about the enhancement by jumping the effects loop. I use a BBE Sonic Stomp to enhance it even more. The strats are totally hot rodded so they will drive even mild amps. The blond 70's has Demarzio Super Distortions in all positions AND Fralin base plates, Torres Engineering Mid Range Pot and 250 MG pots all around. The 89 Sage Metallic Strat Plus has a custom made chromed steel pickguard wearing Vintage 80's high output P90's in all positions with 250 Meg pots all around as well. Both are killers. Goning through the 900's they feel like they play themselves and can give me anything. My playing needs to catch up to my rig. I'm working on finishing up the pedal board. It's a Pedal Pad MPS XL (their largest) and I'm assembling the pedals, connections and what not now. But yeah, I love those two 900's. The Dual Reverb is more versatile and can get more sounds but nothing wails like the SL-X. Those guitars are loud as f' and sweetly toneful. They just seem such a perfect match to the two heads. I think at some point down the road I'll get another 1960 cab. I'll admit that they sound better using the cab as a 4X12 mono. Thicker.....a hacks two cents...:)
     
    medicjg likes this.
  14. medicjg

    medicjg Well-Known Member

    Joined:
    Sep 4, 2010
    Messages:
    1,074
    Likes Received:
    579
    Location:
    Midwest
    [​IMG]

    Thats a nice rig you have there P90.Well since were talking strats now as well. Here is my modified strat plus. Its really one of the best playing guitars I have ever played. The bridge is a blue dully that puts out like 24k when run in series.
     
  15. dixie hustler

    dixie hustler New Member

    Joined:
    Nov 23, 2011
    Messages:
    447
    Likes Received:
    242
    Location:
    lake Orion, Michigan
    Showin off my MKIII 2500. It sounds amazing. Tossing in a pix of me and MR. Sweaty, i Mean MR. Scary. Had him sign the back of my 60's tribute. Really cool guy.:dude:
     

    Attached Files:

    Kladen and medicjg like this.
  16. Adrian R

    Adrian R Well-Known Member

    Joined:
    Jan 28, 2009
    Messages:
    5,217
    Likes Received:
    2,875
    Location:
    Far North Chicago Burbs'
    Hey Dude..

    That's really KOOL! Man, I thought I was anal about amp appearances..but man..what did it cost you to make that plexi glass front..and what did you use to polish the top of the chassis?? Lotza elbow work eh? And then the blue lighting?? You must have some coin into that baby! Either way.. very KOOL...
     
  17. SmokeyDopey

    SmokeyDopey Well-Known Member VIP Member

    Joined:
    Mar 9, 2011
    Messages:
    10,693
    Likes Received:
    5,912
    Location:
    Argentina

    NICE! :naughty:
     
  18. LesPaulopolis

    LesPaulopolis New Member

    Joined:
    Jan 12, 2009
    Messages:
    1,633
    Likes Received:
    235
    Location:
    Minneapolis
    Lars has rocked a 900DR (4100) when I've seen him. You can even partially see his suggested settings in this pic.
    [​IMG]
     
  19. chrispunx

    chrispunx New Member

    Joined:
    Feb 10, 2010
    Messages:
    99
    Likes Received:
    11
    Location:
    utica, ny
    Was gonna say I thought Lars used the 900. Tim...who knows. I'm certain he's not even plugged in most of the time. LOL
     
    topcat 70 likes this.
  20. axe arsenal

    axe arsenal Active Member

    Joined:
    Feb 18, 2011
    Messages:
    335
    Likes Received:
    167
    Location:
    Belgium (Flanders)
    Which period, because they had quite a bit guitar players?..
     

Share This Page