I have a DSL 100h that has been fading in and out and crackling for quite some time. It seems to only happen on the clean channel and makes no difference, if I have my pedal board plugged in or not. I have the fx loop turned off, so I believe that that part of the circuit is out of the equation. I just swapped out the tubes because I suspected the pre amp tubes were bad from some other things I read and still no luck. Has anyone else experienced this?

I just bought a DSL5CR, 
its "classic gain" channel has no gain at all, and one tube of the pre amp don't glow as the other, it glows, but not like the other pre amp tube.
Maybe there is a problem with it?

Kind regards,
Leonardo Bortolin

Can someone tell me why the JMP1 that Geoff Whitehorn and many other guitarist used on guitar cds sounds so different from the 4 that I've recorded with? There is a warm fuzzy present quality on these recordings that the JMP1s I've tried don't have. All the ones I've tried sound the same, so I'm sure I don't have a faulty unit. It sounds great though an amp and cab. I've changed the tubes a few times, but it hasn't made any difference. Cheers. 

Hey 

So i have had this amp since 2016 and i play it a lot. mostly at home on the 5 watt mode. Today as i turned on my rig and put the amp on from stanby(around 20 min) i start playing and the volume starts fluctuating from loud to soft and back on its own. I investigted some patch cables in my pedal board to see if one was faulty and finally just went direct guitar to amp. The fluctuations kept happening.  eventually i turned it off and now am writing this! 

Now where i live the mains are at 220 and this amp is a US voltage amp so 110. I run it through a power transformer and its worked fine for the last 4 odd years. Never ever had this problem. 

Do you guys think a tube is busted? or something else is the culprit. Guitar pots are fine no problem there. the cable and input are all fine. It has to be the amp. Do i need to change out the tubes, have these ones worn out or do you think its my electricity thats irregular? 

I connect the head into 2 different 'cabinets' basically 2 combo amps have that im connecting to the speakers of directly. both are at 8 ohm. again, ive run this setup and play almost everyday and this volume thing has never happened. 

Any help is much appreciated! 

 Hello I want to exchange valves in my Origin 20h, ordered some aol login from Tube Amp Doctor. After I exchange them do I have to rebias it? Is there a manual for rebiasing? I wasn't able to find anything which would give me even slight bit of a hint about it .

thanks

Hi Marshall team,

so now I know I can use my origin 20 head without any cabinet connected, taking the sound from the DI out. 

But my question is...can I use it with the master volume at 6-7 (1-2 o'clock), to get tube breakup point and creamy sound, like I usually do when the head is connected (through an attenuator) to the cabinet? 

Is it safe to crank the volume (max 6-7) when using just the internal dummy load? 

Please let me know, THANKS

Should i connect my wah pedal and tube screamer to the fx loop of my dsl20 combo or directly to the input? Can you tell me the difference and if it's possible of causing any damage? Thanks

Does  5w combo 5C need rebiasing when replacing tubes?

It´s a Class A amp?

Hello friends at marshall

Just bought a new DSL20 combo and i would like to ask if i can install my AMT S-11 tube preamp pedal to the amp without causing damage.

Thanks in advance

I am getting a high pitch squeal out of my amp but only in the OD1, and OD2, channels in anything above green channel. Tubes have checked out fine. I am using a pedal board through the FX loop but I also use a Voodoo Labs isolated power supply. And I have pulled each pedal out of the loop, one at a time to see if it was a specific pedal that was causing the issue.  Still squeals even without pedal board. It is becoming frustrating to try and determine what the issue is. Any suggestions or advice?

Hello,

Where I can buy the Marshall Dsl40c's fuses?

I've had a hard time finding them. My Marshall went silence and I replaced all the tubes.

Running out of ideas.

What brand does Marshall recommend for replacement tubes? I would like to know what would be the best tubes to replace both the ECC83 and EL34 tubes with. I recently had the power tubes replaced under warranty and they used Groove Tubes. To me, they don't sound as warm as the original tubes. I play mostly blues and rock. I like the warm rich sound. I use the overdrive channel, but don't get into the metal sound.

Anyway, I figure I should ask the experts. If you could tell me where I might be able to purchase the tubes you recommend that would be a plus. I'm in the USA.

I recently acquired an Origin 50c. I love this amp and am very happy with it. I have been looking for info regarding tube replacement. I have found several places that indicate the Origin 20 is self biasing, but have seen conflicting info on the 50c.  Does the 50c need rebiasing when replacing tubes?

Thank you

Hello,

I have a DSL15 that is humming a 120 Hz tone, even with all controls down. This tells me the trouble is in the power section. I checked the bias voltage of both 6V6 tubes, and they are there. However, when I checked the voltage across the plate current sensing resistors, one is around 24 mV, and the other is virtually zero. I swapped the tubes, and the voltage values on the resistors went the other way round. It looks I have a bad 6V6 tube, but I'dlike to confirm before I go buying a new one. Any thoughts?

Thanks!

Hello everyone i hope your all doing well

I recently we are talking the last 4 days purchesed my dream amp a marshall DSL100HR. I was very excited to finally be able to get my hands on a marshall super lead series amp. The dream has become a bit of a nightmare as currently i am the proud owner of a fancy paper weight. I handled the amp head with extreme care when i got it. I let it acclimate to my house temp befor even taking it out of the shipping packiging then when i did i was baby gental in doing so i set it up correctly and double checked so befor even powering up the amp. When i did power on the amp i let the tubes warm up like i read to do so i did this for 15m when i switched the amp to power low mode on i think that its 50watt in that mode. I heard a loud pop pop pop buzz and everything died the amp became unresponsive and the only thing that seemed to be working was that the tubes were lighting up properly and i could run the amp in standby thats it. the front panel was dead the foot switch was dead but the amp could still power on does anybody know what the hell happand ?

what did i do wrong did i just get a lemon ?

is this common with this amp range ? 

I am not rich it took a lot of financial planning to be able to afford this amp i am so bummed out. I did speak to the place i bought it from and there sending me a return label and when they get it they will ship a new DSL to me but this whole situation sucks. Thanks for any insite and help i wish everyone well !

(update) I got the return label sent the amp head back there processing a new DSL100HR order for me i wont get it till tuesday/wensday hope the one they send me works ! If the new DSL100HR also has issues i will most likely swear off tube amps forever not at all pleased with my initial experience at all.

(update 2) I have the new DSL100HR and this one works so i guess i got a lemon befor all is well now enjoy your lives people stay metal ! stay rock and roll ! most important stay safe out there !

Hi everyone :) 

I'm a total beginner when it comes to tube amps as it's my very first one.

I've got that weird feeling that something is wrong with my Origin 20C, when I push the gain to its max I don't get that sexy crunchy tone.

I can see the lights of all the 3 preamp and power tubes through the grid. 

If one of them was dead It shouldn't be lightened at all right ?

I thought I had to wait for 30s before pushing the master and play but saw later on the notice that they recommend to do it 2 minutes after turning amp on.

Plus, one our two times and used to transistors amps, I didn't wait at all. Could it caused the issue?

I don't hear any particular cracks, just a bit of white noise when I push it all up

Thanks you all !! 

Just realised the classic gain channel (clean) is louder than the ultra gain channel on my amp. Is this normal? This is with both channels being set the same. Also the preamp tube for the classic gain channel is very dim to the point it's hard to see it lighting up! This is my first tube amp so I'm pretty clueless. 

I'm getting the impression, the tech I'm dealing with thinks I or my settings could be the cause, due to the fact I guess this is the second time within a year I've had this problem. I don't push the amp hard. It's in a 10 x10 room I converted to a studio for recording. Maybe you would be so kind as to help me again. My current settings for volume are:
Overdrive channel Gain is @ 2 Volume is at 75%. On the clean/crunch channel the gain is at 8 and the volume at 75%. The masters are both at about 2. This gives me a good tone at a low volume. In the small room, it's in turning the masters up even to just 5 would require ear protection.
The question is are theses settings pushing the power or preamp tubes to the point that would shorten their lifespan?

I have an Origin 20 Combo and I just bought a new set of tubes, and I was wondering if i have to take it to a technician to bias it, or even if it needs to be biased?

THANKS

I had a problem less than a year ago. I heard a light popping sound, then another then no sound. The amp was repaired under warranty.  I was setting up to record. I turned the amp on, tuned up while I wanted for the tubes to warm up and when I brought the amp out of standby I heard that familiar pop. Kind of like a lightbulb popping. I have had tube amps in the past and never had to replace tubes so regularly. Is this an issue with this model Marshall?