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Asked by xavi Fernández Gaya - 08 Mar 2024 at 09:08 AM.....

 

1. Does this problem occur for all presets? Yes

2. "My potentiometers are almost at "10" - what ptentiometers do you mean? I mean the The volume control buttons for the master volume and volume

3. Do you use any of PRE FX effects like compressor or distortion? If so - what are volume settings of these effects?Yes, I do use pre-fx like compressor or distortions, but they come in programmed presets. How does the volume of these pre-fx settings influence it?

4. What happens when you connect you guitar with your cable to your bandmate's amp?It sounds much louder and more powerful than mine. Is the amplifier a Fender 40W tube amp

When you connect 16 ohms cabinet to 8 ohms 100W amplifier total power is reduced to 50W, but still it should be more than enough. I've got CODE 25 and it's loud as hell.

Is your Code 25 amplifier a combo or is it attached to a cabinet?"

 

The Celestions in my cabinet are the G12-412ACF 12". There are 4 of them. Do you know how many decibels and power each Celestion cone provides? Another question would be, could it be that the Code 100H amp needs a higher power cabinet (for example, 200w)? Do you know if the Code 100H series requires special cabinets to deliver all the power and force of its 100 watts?

I know these amplifiers are very powerful and good, and Marshall never disappoints me, but now I'm worried because I see that in my rehearsals I can hardly hear anything from my amplifier. I think there's something not right in this whole issue. I would like, since I trust you, some solution or something with preamp, pre-fx, or volumes that I'm not handling correctly in the presets

Where could I buy cabinet CODE412?... I need some information about it. Price, technical data,.... Maybe that's the problem because my amp sounds too lower with a classic cabinet as :

Cabinet Marshall Marshall MX412BR.

asked 15 Mar 2024 at 06:59 AM

xavi Fernández Gaya
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Was wondering why the clean channel on my DSL40CR sounds slightly distorted.  Not truely clean.  Could this be a tube issue? Thanks.

asked 05 Mar 2024 at 07:30 AM

JOE SZEVIN
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Ive just bought a second hand jcm900 4102 combo. its from about 97/98. its my first valve amp, and when i brought it home i had a look round it, and noticed that two of the power tubes had cracked, so i changed all 4. all the preamp tubes are fine. but even though ive just changed them, there is no sound coming out of this amp at all, not even a crackle. HELP!!!

asked 08 Jan 2024 at 10:23 PM

Will Wigglesworth
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Hi is the Silver jubilee mini 2525h auto biasing? Can replace the tubes "plug and play"?
Thanks for the help

asked 02 Jan 2024 at 01:11 AM

Emanuele F.
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I have a Marshall DSL40CR. It came with EL34's as the title says. I decided I wanted to try 6ca7's and was told they are essentially drop in replacements for EL34's. I had the EL34's biased at 35-36mv. When I put the 6ca7s in, I was shocked because the bias was 70mv. I lowered them down to 35-36mv.

My question is: Should the 6ca7's be biased to the same number I had the EL34's at? Should I go higher or lower? The reason I'm asking is that most Marshall techs say 35mv is where you should be at with EL34's to sound their best. Is this the same for 6ca7's?

There is also a very slight burning smell in the rear of the amp. Don't know if this is just something about the new tubes or if it's cooking the amp....sounds fine though.

edited 14 Nov 2023 at 08:08 PM

Roger Gordon

asked 14 Nov 2023 at 03:28 AM

Roger Gordon
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I have  DSL 40 valve amp (about 2 years) and it has suddenly stopped giving any sound although power is on and valves seem to be on.  Any ideas?

Thanks John

asked 02 Oct 2023 at 03:33 PM

John Burns
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Can I put KT 66s or swap any tubes in my JTM Marshall studio

asked 19 Sep 2023 at 07:11 AM

Mondo Cortez
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Hi.

I've got a line6 spidervalve  212 that the DSP board went bad on, but the power amp is still good.

Any issues with connecting the line out of the Valvestate 8080 to the power amp in of the tube amp?

I can't seem to find any issues, but would love input on this.

Cheers,

Steve

asked 29 Aug 2023 at 12:34 AM

steven crandall
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Hi, after a few long hours of use, turned on my DSL40CR and the sound faded away and now has a faint sound even cranked. Plugged in the the effects loop return and sounds fine so the issue is in the pream section. It's not q tube as o installed a fresh set to check and still the same issue. Any ideas what could have happened?

asked 17 Aug 2023 at 04:52 PM

Kevin Cruz
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I have an inbound JTM studio and I wanted to get a few extra pairs of 5881 tubes to have on hand. What tube types are acceptable for this amp besides the 5881's? For example can I use KT66's?

 

thanks,

 

howie

asked 11 Aug 2023 at 02:08 AM

Howard Blumstein
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I've never the bias checked on this amp. Had to after I had a certified technician swap out the speaker and power tubes for the first time.  He was getting very low readings. If he maxed out the bias adjustment knobs, he was getting a maximum of 31 mV or 32 mV on both sets of testing ports.  He could not adjust any further. 

Interesting, I thought, so he put back the old tubes and speaker back (and he tried a combination of new speaker/old tubes, new tubes/old speaker).  ALL were relatively the same.  The highest reading he could achieve was around 33 mV.  He used multiple multimeters, so I'm quite confident that the readings were accurate. 

The older tubes were the original Marshall EL34's. The new tubes are JJ EL34's.  It has the original V-type speaker which I was trying to change to a 8-ohm Eminence Texas Heat (8-ohm jack was being used).  The tech is still investigating, but I figured I would ask  on the forum to see anyone had ideas as to the cause of low mV reading/adjustment on the bias.   

Thanks!

Chris

edited 04 Aug 2023 at 01:58 PM

Chris Lawson

asked 04 Aug 2023 at 01:39 PM

Chris Lawson
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I own a studio classic, vintage and mini jubilee -- I believe that they are all cathode biased and do not require any re-biasing when replacing power amp tubes (using matched pairs). Can anyone confirm? And I am assuming the new jtm20 is the same.

 

thanks,

 

hb

asked 02 Aug 2023 at 09:03 PM

Howard Blumstein
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Hi whats the best valve kit replacement for jcm 1 watt 50 th anniversary and where to buy them from

asked 30 Jun 2023 at 08:18 PM

mark greenfield
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Hey Guys

I'm looking for a good home amp that isn't a tube amp that I have to crank loud for my tone. Looking at either one of the amps from the MG series or a Code 50

I'm a blues, blues rock and classic rock player - Allman Brothers, Ten Years After, Savoy Brown, Doobie Brothers, Dire Straits, etc

New to Marshall amps - sure I've listened to a lot of the greats playing thru them but I'm not all that familiar with the various models.

With the Marshall MG series, I see various designations such has MG50CFX, MG50DFX, MG50GFX and the most recent are referred to as the Gold series

I worked in electronics so I would guess that the various designators are revisions that took place in the amps - does anyone have info on what those differences are? Or time lines, approx dates when the CFX, DFX and GFX amps were brought to the market? Any thoughts if one series are seen as better

Or would an older AVT50 be a better choice?

Any thoughts would be welcome and many thanks in advance

 

Keith

aka GnLguy

asked 15 May 2023 at 04:59 PM

Keith Stone
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Hello,

I'm going to replace the power tubes with a new kit of 4 matched EL34 and I would like to know what is the BIAS setting recomended by Marshal in terms of how much mV we should adjust on the reading of the Test Pins  CON5. I found someware that is 90mV per side, but also other different info (some guy said 76mV after consultation with a techician). Please could uoy kindly advice?

thanks!

asked 01 May 2023 at 01:46 PM

Roberto ACErob71
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I have a Marshall DSL40CR. I have checked the amps bias 5 days in a row and every day it's lower than what I have set it to. I was told bias in 40 watt mode should be around 35. When I set it to that on the first day and played...it sounded excellent. I put it in standby and powered off. The next day I turned it on with standby on and waited around 5-10 minutes. When I went to play it sounded really off. So I decided to check the bias and 1 tube was at 30 and the other 33. I reset both to 35. 

The next day after that I had to set it yet again because it was 30/31. The next day after that the same thing lol. 

Would this be an Amp issue or Tube issue? Once I set the tubes to 35...plays and sounds great the entire time I play. However, if I shut the amp off and come back later the amp bias is always lower.

 

asked 13 Apr 2023 at 01:07 PM

Roger Gordon
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Hi,

A few months ago (Oct 2022), i buy in Reverb a Marshall Valvestate Bi Chorus 8280 and when i turn on, all feels ok, but one day i note only work one speaker. I change the cables and the other speaker are fine and i think the problem was in the output jack.

Finally, i found a tech who tell me he can check it and repair. When the amp is ready to go, i pay and check it in their local store and i notice a weak sound, but i thinked it was the room. The L and R speakers out works now but the problem comes when i push the chorus and the volume rise and have more body.

The guy tell me is because the amp only works in stereo when chorus is on (great sound and body), and in mono (sound lack and low volumen) when put off, but i don't believe it and that's why I'm looking for an answer here.

P.D. When i receive the amp, the first thing i do, is change the valve, so this is not the problem. If i disconected one speaker (L or R), sounds good and the chorus doesn´t affect the tone.

Please help me.

asked 08 Apr 2023 at 12:53 AM

Jorge Rodriguez
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My Marshall AMP not working. Please help :-)

Hello,

I own a Marshall JVM 215c. I purchased this when I was living in Portsmouth. I didn't have much of a chance to use it as I was also studying for a degree at the time. I then moved up North. So 7 years later I'm in a position to crack back on with guitar (finally).

So I dust off my JVM 215c. Turn it on. Nothing happens. There is sorta a thump sound when I turn the power on. But then nothing.

Does this sound like a valve issue? And if so, is it easy to fix myself? Or does this amp need a professional to look at it?

Kind Regards,

Lee

 

asked 31 Mar 2023 at 07:49 AM

Lee Taylor
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In case Marshall decides to do another round of Codes, or for people that want to buy one, here is my bottom line after dealing with this thing for a few years. I had Line 6 experience and wanted a simpler all-in-one modeling combo with a bluetooth app that could do hard rock. The Katana looked like a toy so I bought this.

PROS: Solid construction. Looks great. Good range of amps and effects. Bluetooth app is very good and can tune every parameter. Tones can be downloaded and backed up to/from Marshall site. Amp can sound very good (after a lot of tweaking). The Plexi, American OD, JTM Crunch and Acoustic amps are good. The Guv’nor, Compressor, Chorus, noise gate and all the delays and reverbs are useable. Marshall has done sufficient software updates to correct early issues (bluetooth, tones, bugs). Can be used at bedroom volume with Master on ‘1’. Optional footswitch gives good control. Documentation is good. Updater software on PC works well.

CONS: Other than those mentioned above, all the other amps and effects are bad. This includes the JCM800, JVM and Silver Jubilee. All the cabs are bad. None of the stock patches are usable. You have to make your own. There are user uploaded patches you can try but very few are usable. Learning curve is significant. The amp is too loud. When you turn up from bedroom level to louder, the sounds change and become very boomy which should not happen with a modeling amp. No effects loop. The ‘out’ is a mini USB. Connecting to a computer requires a mini USB to USB or Lightning cable, which is not included. I tried to use the USB to record to Garageband and sound came out but I couldn’t make it sound good. The footswitch also has a learning curve, and like other people I had to have mine replaced. 

ADVICE: Don’t buy it. I bought my Code 50 new from Sweetwater for $299 and now the same version of the amp is $399. If you must have a Code, get the 25 instead. It is cheaper and still absurdly loud. The higher volume available in the 50 is useless because it sounds bad. The extra hundred bucks just gets you painfully loud solid state power amp watts. 

If you do get a Code, upgrade all the firmware immediately. You need to connect to a computer to do this, but first you have to find the cable on Amazon. This is unforgivable.

BOTTOM LINE: I have spent too many hours tweaking the Code. This is what I hated about Line 6. But the Line 6 tones were superior. I never got a good JCM 800 sound out of the Code, after hundreds of hours of work. It’s only “great” amp sim, oddly, is the American OD. Marshall’s own Classic Metal patch uses this, not a “Marshall” sim! The Code is marketed as Marshall technology with amp sims created by Marshall, but it is not. Softube created the software and tones. This is not a Marshall amp. Line 6 Marshall sims are far better.

I have now bought a tube amp. I am keeping the Code because I have mastered it and can practice on it but I would not buy it again, certainly not for $399.

edited 11 Feb 2023 at 01:42 PM

Tom Joyce (1)

asked 11 Feb 2023 at 01:42 PM

Tom Joyce (1)
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I purchased my DSL40CR in Sept 2020. Its never left my bedroom, never been played particularly loud and (unfortunately) I have not had a lot of time to use it.  The presence and resonance originally worked when I received the amp but now turning either of these two knobs has no effect.

Also there has always been an occasional, infrequent, weak 'crackle' noise.  Is this a tube problem or is this normal for this amp?

Is there an 'easy' fix, like swapping tubes?  Is that something I can do myself?

Please let me know what my options are.

Thanks,

Dean

 

edited 16 Jan 2023 at 06:59 PM

Dean Mumme

asked 16 Jan 2023 at 06:45 PM

Dean Mumme
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