jcm 2000

  1. P

    JCM 2000 DSL401 new user questions

    Just purchase a JCM 2000 DSL401 combo and have a couple of question being that I don't know jack about this amp or amps in general. 1. I read in manual that internal speaker was 16 ohm. When I looked on back, the switch was set at 8 ohm. I can't see what the actual speaker is unless I...
  2. felipevsw

    JCM 2000 idle buzz/hum

    I got this JCM 2000 DSL50 used recently. It is from 2001 and had the dreaded bias runoff problem that I got fixed last week. It has this static-like noise even when all knobs are at zero, but only when its off standby. When I engage standby, the noise stops. I thought this would be somehow...
  3. felipevsw

    JCM 2000 DSL 50 output transformer brand (2001)

    I was checking this thread: https://www.marshallforum.com/threads/marshall-jcm-2000-dsl-50-mfg-2001-drake-or-dagnall-ot.106852/ But it didn't had a proper confirmation since the topic side tracked to the bias drift problem, if it exists or not... so I've decided to start a new thread. BIAS...
    • felipevsw
    • Thread
    • drake drake transformers jcm 2000 jcm 2000 dsl 50 output transformer transformer
    • Replies: 7
    • Forum: Marshall Amps
  4. P

    Replacing a fuse for a beginner

    Hey all, first post here. I just got an old JCM2000 DSL401 (Clean-OD1-OD2, 4x EL84, Marshall Gold Back speaker) combo from my drummer. He said that the amp turns on, but no sound comes out, so I could keep it and try to fix it if I wanted to. I figure at the very least I could try and salvage...
  5. Sapphire Sounds

    What happened amp is quiet now

    I had a buddy jam on my tsl 122 and had it plugged into a cab with two 15s wired for 4 ohms and plugged it in left stereo on 4 ohms with the stock speakers in the right channel and it was amazing now there's no sound, power tubes or speaker output transformer?? How do I check and get it working...
  6. Volodymyr

    Marshall JCM 2000 DSL 50 gain loss troubleshooting

    Hi folks, I recently bought my first Marshall the JCM 2000 DSL 50. I have spent a few days, playing around with it, switching between channels and mods, trying to pool all possible sounds from it. Some moment, when I was playing on a red channel Lead 1, the gain suddenly disappeared, the...
  7. V

    1998 JCM 2000 DSL 50 - One power tube won't bias

    Hi everyone, sorry in advance for the long post. I bought a JCM 2000 made in '98 without knowing any of the issues they're infamous for. I used it for weekly band rehearsals for a few months before I came across the bias drift issue on this forum. So I took my multimeter to rehearsal and reset...
  8. Volodymyr

    JCM 2000 DSL 50 has no gain on the red channel

    Hi everyone, Recently I purchased my first Marshall amp, the JCM 2000 DSL 50 But my happiness didn't last long. A few days ago, something went wrong. I was playing on a bedroom level, a volume of about 2/2.5, a gain of 10, on a lead 1 red channel boosted by the Boss SD 1, suddenly all gain...
  9. D

    Marshall JCM 2000 DSL 401 - Reverb not responding

    I've recently done a few things to my DSL 401 (swapped tubes, and raised the bridge rectifier to avoid unsoldering when amp gets hot). During the soldering process, something happened after my friend suggested tinkering with the ohm settings to get more out of the amp. Long story short - amp...
  10. Kuba_Em

    Marshall JCM 2000 DSL 50 Identification

    Hello, I came across an offer - Marshall JCM 2000 DSL 50 and it looks like this: It comes with the serial number. I couldn't find any other pics of marshall amp that would look like this. So does anyone know if this is some handmade cover or there was a version like this? Btw. could you...
  11. ThingFish

    Switching from Gain to Clean Sags Volume

    Hi Guys- I'm working on a TSL 122 JCM 2000 Combo. I replaced the main board with the new Rev "non thermal" board, retubed, and conservatively set the bias. The amp sounds great, no issues after many hours of long rehearsals. However, when switching from either gain channel back to clean...
  12. tbonesullivan

    Just picked up a 2005 JCM2000 DSL50 Head - Bent rear Chassis Questions

    It's been a while, but I am once again back in the Marshall Fold. Technically I never left, but with the red-plating issues on my TSL122 combo, I've been avoiding Marshall things. Anyway, found a good deal for a DSL 50 head from 2005 (after the thermal bias runaway issue) with a Vintage 30...
  13. H

    DSL 401 troubleshooting help

    Hey guys I need a little help troubleshooting my DSL 401. The amp powers on but I have no output.The tubes are also not lighting up. All the fuses check good with a multimeter including the internal one. I’ve checked voltages at all the tube sockets and seem to have the correct voltages...
  14. Kutt

    Rocker switch replacement - Discharge caps?

    At some point soon I'm planning on replacing the power rocker switch on a JCM 2000. I know it's best practice to always discharge caps. My specific question is this- Is it a guarantee you'll get bitten if you do not discharge them while replacing the switch?
    • Kutt
    • Thread
    • dim dsl flicker jcm 2000 light power switch tsl
    • Replies: 17
    • Forum: The Workbench
  15. J

    No Reverb on TSL 100

    Hey the as the title states, my TSL 100 (JCM 2000) has received very little use over the years unfortunately and upon booting it up recently I have found that the reverb does not work on any of the three channels. I have replaced the RCA cables going to the tank and flipped the cables on each...
    • Just forKriks
    • Thread
    • amp head jcm 2000 marshall reverb reverb bank reverb problem tsl 100 tube amp
    • Replies: 19
    • Forum: Marshall Amps
  16. B

    Dr Tube Bias Mod kit for JCM 2000 DSL

    Brand new, Dr Tube Bias mod kit for JCM 2000 DSL amps to fix bias drifting issues on those amps. This was purchased but never used for an amp deal that fell through. I have the part and instructions. Save time and costs over ordering from the UK. Local pickup welcome if in So Cal. $65.00
  17. DerekLicon

    ClassicTone OT and Choke installation in JCM 2000

    First off I want to say thanks for those of you that put the time forward in the ClassicTone thread, the information there was invaluable in helping me install my output transformer since mine didn't come with a part print or any instructions. I've been a decade-long fan of these forums, just...
  18. Hammerheart

    JCM2000 50th Ani 1w vs current DSL1 and bigger DSL heads

    Hi all! I own the 50th ani 1w JCM2000. I love the tone of this thing on the classic gain channel and I will never be parting with it. It's great at low volumes as a combo and it sounds fantastic through my 2x12 (v30+greenback mix). I love the high gain channel as well (I know many don't). My...
  19. Kutt

    N50wAD !

    It's new 50 watt amp day! Scored a DSL 50w. It had been at a nearby shop for a few months and I finally got it for a price I was willing to pay. It's a 2005 and in excellent condition. Got it home, pulled the chassis, cleaned her up bow to stern, and installed all new tubes, wall to wall...
  20. bmcguitar

    Opinions on the DSL 100H Heads

    Hey all! My old 1999 JCM2000 (with replaced mainboard 100w head) is still giving me grief so im looking to upgrade to a newer DSL Head as a replacement / backup when shit goes wrong. Whats everyone's opinions on the newer heads vs the older JCM2000 heads ?? For clarity I use the crunch channel...

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