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I would appreciate any support you can give me. 

I recently purchased a DSL20CR; when I received it, I heard a strange buzzing sound in the studio, which the other Marshalls did not have, 

I contacted the local Marshall dealer. He told me that it is a common issue, and other similar models had the same behaviour. Still, customers report that regular activity will work itself out until it disappears, in other words, with regular use.

And although it sounded strange to me, on the supplier's website, a customer reported this, I contacted him, and he told me that one day the noise stopped.

Well, today has been several months, and the humming continues,

It starts at 46 dB, but with increasing volume and gain, it reaches 90 dB without any instrument connected, only the power socket.

I have tested it in several places and with regulated electrical outlets, even with filters and signal stabilisation with an inverter. The power supply is optimal, but it has the same behaviour.

I asked the supplier's technician to check it, and then the report says that there is nothing abnormal, that according to him, all the components are correct, and there is nothing that generates problems for its use.

So the supplier tells me that they offer no warranty and no replacement and that this is normal for this amplifier.

I decided to replace all the tube tubes with new ones with the exact specifications.

I bought the Tung-Sol kit and another JJ for this amp, both for power gain and preamp. 

After the change and tried both options, it continued with the same sound, noise; in a previous mail to Marshall, I asked to confirm if this amp needed to do any BIAS process; well, the answer is no; it is not necessary. Still, I compared the tubes before and after, and they had a similar value. at 10W, they gave 24 mA, and at 20 W, about 57mA

I know there are similar problems, and I have read in forums about component changes to solve the problem. Still, those forums also refer to issues with the emulator output, but this is working correctly in my case.

What can you recommend, is there anything I can do to fix it?

I appreciate any help you can provide. 

Betto

asked 11 Oct 2021 at 05:24 PM

carlos jimenez
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Hi there. There is a very audible metallic ringing coming from what most likely sounds like the tubes when the gain or master volume is turned up to a usable level on any power setting. There is also a high-pitched scratching type buzzing (not 60hz or ground buzz) at higher master volume levels even with the tilt, presence, and treble turned all the way down.  It sounds exactly like the problem user Chris Holtmier asked about in his question on Dec 27, 2018. It is brand new shipped, and I noticed this immediately out of the box just 30 mins ago. I have tried other speakers, guitars, guitar cables, position in the room on the floor and tightened all the screws as well as re-seating the tubes. It's probable that the tubes are microphonic after shipping but because of the way it is built, I cant reach the tubes to do the tap test when its plugged in. Although the response to the previous question in mention was stated as "We have not come across a rattle on the Origin 50 Combo" it seems that this is a recurring problem with a few of them as he was referring to a post on another forum about the same kind of noise on an Origin 5 as well.

I guess my question is, why doesn't this work properly brand new and is there anything besides a re-tube that you can suggest to fix the problem without returning it?  I can post a sound file if needed. I usually re-tube with JJs anyways (which I suspect would fix the problem) but for now its actually cheaper to drive a 6 hour round-trip on a weekday to a GC than a $100 re-tube that possibly still might not fix the issue.

Other than that, I do really like the amp. I can tell that I would really enjoy it without the noise. I enjoy the effects loop, line out, gain boost, the tilt knob, and especially the vintage styling. It reminds me of a bluesbreaker. I dont play anything other than lower-wattage cathode-biased 6L6 or EL34 and I love pushing them to the max.  With a Rat going straight in I had a lot of fun with it before I noticed the noises again. I'm willing to admit its just a random lemon but maybe it's just from UPS handling and tubes being the way they are. I am going to play it side-by-side with the same model and check that theory. If its just the tubes I will def get the same amp again.

edited 28 Sep 2021 at 01:05 AM

Steven Acklin

asked 27 Sep 2021 at 07:10 PM

Steven Acklin
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5

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Hi, after turn on my CODE 25 at very high volume with a mic turned on I almost got deaf. I turned off the Amp in 1 second... BUT, after that all the low tones/frequencies are distorted/buzzing/ugly dont know how to explain (E string with or without Cab, Amp, Mod, Rev, Del), they are buzzing coming from any Guitar or even music coming from the Bluetooth ... High tones sound fine. I tried to reset the amp and did a firmware update but I still have the issue. Also i tried several guitars, usb cables, guitar cables and even my PC but I still have this distorted low tones. Could anyone give me any advice besides going to the maintenance?

Thanks!

asked 03 Jun 2021 at 06:26 PM

Fabio Fujita
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Hello,

I took delivery of a Code50 last Friday, and already I have noticed a major flaw. I have updated the firmware, and it didn't solve the problem.

1. On many of the presets, there is what sounds to me like a slight buzz or a distorted sound as the chord is being held after about 4 or maybe 5 seconds. Obviously, this isn't going to be good when recording.

For example, I have been using many of the clean sounds, such as, American Clean (preset 32). This is a prime example of the unwanted buzz as the chord fades (only 4 or 5 seconds). There are so many more presets that also have this problem.

The issue occurs through both the Code50 built-in speaker and my Beyer Dynamic DT100 headphones. Using headphones proves that it is not the internal speaker at fault.

I can email a sound byte if you need one.

The last thing I want to do is re-box the amp and return it for a replacement only to have the same issue happen with the next unit. So, please can you let me know if this is a widely known fault because, if it is, I will unfortunately have to send it back for a full refund.

2. A second issue worth noting here is that the clean sounds are not very loud. When wearing headphones, I have to increase both volumes to 10, but I can still hear the strumming of the actual guitar with my plectrum coming through the headphones. The volume on the clean sounds are too weak and definitely not loud enough when also playing through the Code50 speaker, not just the headphones. Conversely, the distorted rock sounds are really loud when the volume is set to a low level, but the clean sounds couldn't be more opposite.

It will be a shame if I return the unit because I love the app and the ability to back up presets and also search for new ones.

Many thanks 

asked 17 Nov 2020 at 07:50 PM

R Cross
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Hi. I just bought Marshall 1959 HW and it's constantly humming when it's on. I have Wizard Modern Classic Amp and ENGL Powerball 2 and they don't hum like that when ON. Is it normal? Also when I strum a chord very loud mechanical noise going out of the back. Check the video I shot to hear how both issues sound:

asked 30 Jan 2020 at 04:15 AM

Andrew Zelenokhat
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Hi,

I recently bought a Marshall DSL20HR head and a Marshall 1936 Lead 2x12 cab. 

The head has a cab emulator out, so I hooked it up to my audio interface and was playing through my pc monitors. I turned up the volume and gain on the ultra gain channel and a strange buzz/noise came from the head when I would strum a chord or pick a note.

I only noticed this because I had the level on my interface low as I was just testing the cab emulator out. I have alos tested this with the head not plugged into either my interface or the cab and still get a strange noise/buzz.

As this is my first valve head I'm not sure if this is just something that happens when you turn up the volume and gain - as the amp is being pushed harder, or if there is a fault with the head and I need to take it back to the shop I purchased it from.

I will link below some video of the problem. The first video sounds worse than it is as I put my phone directly on top of the head as I play. It's not the signal noise from the amp that I am worried about, it's the rattle when I strum chords or hit notes...

https://youtu.be/ftOsSKeM8H4

https://www.youtube.com/watch?v=CWTiPugPfZ4

Any help would be greatly appreciated, I'm probably just over reacting, but it would be good to get some reassurance.

Thanks! \m/

asked 09 Jul 2018 at 06:08 PM

Rory Judge
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I recently got myself a Marshall Valvestate 8100 head, which sounds amazing for a hybrid amplifier. Now there is one problem with the amp, and that is that there is a low buzzing sound when I turn it on. It does not get louder when I turn up the volume or gain, and it doesn't disappear when I switch channels, which means that it can't be the pre amp tube that causes the problem. I don't use a grounded power socket, but my other amp (an Orange Tiny Terror) doesn't hum so I don't think there is a problem power wise. My guess is a bad soldering joint somewhere in the amp, but I have no idea where to start looking. Is there someone who can tell me how to get rid of the buzzing? And how do I identify a bad soldering joint?

Cheers, 
Brian

asked 29 Apr 2018 at 08:07 PM

Brian Legdeur
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7

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Ok, the buzz, fuzz I and others noticed (Its Real). First before you ask I tried the cable and the guitar on my Crate Amp. The notes ring like a bell No fuzz or Buzz.

So that eleminats my guitar and cable.  I notice if I use eather the Acustic or Natural Pre Amps on my Code -50 the BUZZ / Fuzz dissipears. So I assume its not a hardware issue with the Code 50. I think its a software issue. Is it possiable to fix and down load  new Pre Amp Modelse to fix the problem? 

I would love to get this fixed! Its annoying!

asked 12 Feb 2018 at 09:52 PM

joe Pomponio
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1

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The noise comes and goes the more I play.

I love the sound of this amp but can't get rid of this noise.

Please help

asked 18 Feb 2017 at 05:07 AM

Doug Campbell
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A couple of weeks ago I bought aforementioned amp. I was very happy with it, no issues so far, but today while playing I noticed a weird buzzing sound that my amp makes whenever I play an A note on my guitar. I tried different fret position, plugging in my other guitar and even moving the amp in case something else than the amp itself was making the sound. Nothing helped. Did anyone else had a similar problem? Any ideas what might be causing it?

asked 15 Jan 2017 at 02:32 PM

Jan KrawczyƄski
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