Questions
Showing results 1 to 20 of 92
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Does changing from one wattage to another while the amp is on cause any problems?

It doesn't seem to cause any audio issues besides the obvious change in volume - but will it hurt the lifespan of the tubes or damage any components?

So what's the rule? Choose power level before turning on? Turn down the master volume before changing power levels? Or does it make zero difference?

Tubes Power Origin Origin 50H

asked 10 Dec 2018 at 07:45 AM

Tom LeBlanc
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I have a marshall dsl 100 head,I have a problem of no sound, the power supply is working fine,all valve tubes are working as well ,so I'm wondering what is the problem.

Valve Tubes DSL

asked 03 Dec 2018 at 09:21 PM

Matthew Johnson
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Is it possible to play two different tube amp heads at the same time out of one 1960a cab?  Mine has the switch on the back to make the cab run in stereo mode and I was curious if it would be possible to use both inputs for independent heads.  Of course the impedance would have to be matched (8 ohm - 8 ohm), but I have no idea if it would handle the amp load properly or not.  Trying to find out for sure so I can avoid breaking something if it's not possible.

Cabinet Tubes Cabs

asked 01 Nov 2018 at 03:35 PM

Ethan Kiefer
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I have a question about my DSL5CR Classic Gain channel. I replaced the stock power tube with a 12BH7A-STR-TAD and replaced the stock pre-amp tubes with Genalex Gold Lion ECC83/12AX7 tubes. I biassed to 100mV. I now have no discernible gain in the clean channel. I can alter the volume, but even at full gain and full volume the tone is pure clean. Did I clean it up too much or is this normal?

Tubes

asked 29 Oct 2018 at 12:32 PM

Steve Perfect
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Hello...I have a marshall dsl 100 and also dsl 40 C amp, need to change power tubes EL34, the ones I bought is JJ with 8 pins only, while the factory set tubes have 9 pin. Is there any issue using either of these?

Tubes DSL

asked 28 Oct 2018 at 05:29 AM

AXL Rose
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3

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Please read this post in the spirit in which it is posted.

I monitor these forums regularly as I have five Marshall CODE amps. and I guess I like to see what's going on and stay up-to-date.  And I suppose I enjoy sharing my knowledge and helping others where I can.  I must also note that I've not had any of the issues described on these forums with any of my CODE amps.  And I must also note that I think they're the best modelling amps. around i.e. they're Marshalls and enough said.

But what concerns me (and hence this post) is this: there really does seem to be a lack of interest on the part of Marshall Amplification when it comes to the CODE range (at least here on the forums i.e. if emailing Technical Support yields different results then I do apologise) (and given the fact that I've had no issues at all with any of my CODE amps., as noted above, I've never had to contact Technical Support so I would not know).  It's almost as if Marshall regret the day they got into this modelling business (and if that's not the case: sorry but that's my personal impression at the moment after, what, around eighteen months or so of monitoring these forums???).  I mean to say: there are so many posts around here (dating back) asking for feedback re: apparent bluetooth issues, projected dates for new firmware updates, etc. etc. etc.  And no answers.  There's even been one or two posts asking if Marshall is going to continue with the CODE range or if it's something they want to get away from.  No answer.  I think you get the picture.

The above being said: I do understand how frustrating it must be to be asked the same old questions over and over and over again ESPECIALLY when a forum member couldn't even be bothered to search the forums for an answer before posting and asking a question or before reading the manual.  Hell: if I had a few USD or GBP or EUR for every time I've answered a question on here re: standalone software to control these amps. well, then, I'd probably buy some more CODE amps.!!!  LOL!!!  Point is and all jokes aside: I do get it.  But it's no excuse for a lack of response on some very key issues (like those mentioned above).  And what's more: for some they're not asking for favors i.e. they're quite willing to help themselves but need a little bit of input (the Master Volume issue comes to mind here) and they just don't get that input.  And (back to the firmware issue): some are even prepared to roll back their firmware to a previous version as (apparently)  some issues were not issues in previous versions i.e. they're not even insisting that a new, immediate, firmware update with fixes is made available.  Fairer than that I don't think they could be.  But: no response (or, in some cases, a very non-committal response anyway).

In closing: I don't know if I'm correct in my assumption that Marshall isn't too interested in this CODE range of amps.  I also don't know if, maybe, this (perceived on my part anyway) lack of interest is because this particular market is quite tough nowadays (what with other modelling amps. and a plethora of plugins and the rest of the junk out there) and maybe the core business (the more expensive and professional products) is being conentrated on and these CODE amps. are just an irritation.  But you need to know this (as I have noted already): they are STILL Marshall amplifiers.  And there is nothing on the market (whether it be another modelling amp. or a plugin) that sounds like these amps. (or, at very least, comes as close to emulating the more expensive and professional Marshall valve amps.).  So they are actually something to be proud of Marshall.  Just bear this in mind going forward.

As I said: please read in the spirit in which this is being posted.

No response is necessary either.  But please do take cognisance of what I've posted above going forward.

Regards,

Dale.

CODE Bluetooth Valve Manual Firmware

asked 20 Sep 2018 at 09:12 AM

Dale Paterson (89)
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Hello,

I've noticed that there is rattling/jangling coming from the amp (not the speaker) when playing notes between low  A and C and their respective octaves above. It sounds like it is coming from the EL34 valves - is this due to the way that they are mounted without spring dampers? They have not gone microphonic as far as I can tell, and are otherwise performing as expected, so I feel this is more a mechanical issue with the chassis/mounting, or it's just an undesirable characteristic of the valves themselves. What I'd ideally like to know is, do all Origin 20Cs do this or is this the first anyone has heard about this?

I've removed every external variable there could be, moving the amp to another location and isolating it from floor vibrations in the studio. I've taken the 'amp' out of the cabinet so that I could lightly tap the valves, and check the screws around the supports are not loose. You can generate the rattle (or very similar) just by tapping lightly with the handle of a screwdriver, on both valves. This is what I was expecting if it was just physical vibrations from the speaker causing them to rattle in sypmathy. The rattling sound does not get amplified, so it's not in the audio path.

It's enough to be offputting when tracking/practicing in the studio unless pushing out really high volume so that you can only hear the guitar. I play fairly clean a lot of the time so it is more obvious under those conditions.

Would really appreciate some advice. If the answer is, "It's the same for all and there's not much that can be done..." then ok, I just need to know. That said, I spotted there was some sort of similar issue perhaps on Class 5 amps that a kit was developed for to resolve? I may have misunderstood though.

If there is any further mechanical troubleshooting to be done then please let me know. I wouldn't want to void the warranty status if possible. For what it's worth, I'm a systems and support engineer for a large format mixing console company, so I'm competent enough to poke around as required... just figured someone may have alreday solved this one before I carry on!

Kind regards,

Ed

 

Valve Speaker Cabinet Tubes buzz rattle Origin vibration

edited 09 Sep 2018 at 11:28 AM

Edward Arnold (1)

asked 09 Sep 2018 at 11:27 AM

Edward Arnold (1)
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73

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Valve combo under 10 month old main power switch red stopped working can this be repaired under warranty ? 

Valve switchlight

asked 07 Sep 2018 at 11:25 PM

bob summerson
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185

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Hallo,

I got a doubt on well interpretating the manual where it states:

WARNING: When using the DSL1HR head
for ‘silent’ practice or DI recording ALWAYS
disconnect the speaker cabinet from the
amplifier’s rear panel before switching on.
NEVER unplug the speaker cable from the
speaker cabinet while it is still connected
to the amplifier rear panel. This may stress
the amplifier’s power-stage and in extreme
cases may lead to valve and/or transformer
failure.

can someone confirm what I understand: if I want to play using an headphone for silent practice (connecting my headphone to emulated line Out), I shall prior disconnect the external speaker from the rear of the amplifier (shouted off), (and never from the rear of the speaker cabinet). So I can Play the amplifier using headphone without connection to the cabinet? is that correct? An this is applicable also if I connect the amplifier to a mixer (by using Line out). That is quite strange because all other amplifiers recommend to never disconnect the speakers, with or without an headphone or something helse. Please help! I don't want do damage my DSL1HR. Thanks. Cheers.

 

Valve Speaker Cabinet Manual

asked 06 Sep 2018 at 11:32 AM

Roberto Scavo
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65

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I have had this amp for a few months and still can't seem to dial in a good sound. It is my first Marshall and first tube amp. I have looked on-line for settings to no avail. This also has the upgraded Creamback speaker from Sweetwater.

I use this mostly at home and am looking for a good clean tone and a good distorted tone.  Any help would be greatly appreciated. I use the 20 watt setting.

 

Thanks

Speaker Tubes

asked 28 Aug 2018 at 07:21 PM

Peter Schwotzer
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91

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Hi,

I have to replace the power valves on my 2525C jubilee.
And I do not know if there is a bias setting to do.

Is the 2525C a cathode amp bias?
A class A?

Thank you in advance for your answer.

Valve Mini Jubilee

asked 15 Aug 2018 at 08:42 AM

olivier jault
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1

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58

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I have the JTM 1H offset. The tone control has no effect on the sound. I tried different volume levels. I tried different cabinets. I also changed the tubes. any advice?

Tubes jtm1h toneknob offsethead

asked 28 Jul 2018 at 01:03 AM

Damian Josefsberg
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1

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167

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Hi there, guys 

I’m new to the forum and new to valve amps. In fact, I’ve just purchased my first valve amp: a brand new JCM 800 2203 reissue.

Running through a 1960av and a Rivera Rock Crusher attenuator and it sounds awesome - except for these damn so called ghost notes (just learned about them) that only happen when I set the master volume at higher values (above 6.5 or 7). It also only seems audible in higher pitches around the 12 fret.

Reading a lot about filter caps and stuff. But it’s a brand new amp and I still have warranty. So that’s not the case for trying to fix it myself.

My question is: should I assume it’s “normal” and keep my amp? If that’s the case, how can I crank it (and get that  beautiful power section overdrive) and minimize those annoying ghost notes? Is electric grounding improvement / adding a power filter of any good?

Or you guys think I should go to Marshall assistance and ask for a replacement?

Thank you very much,

Any help appreciated,

Valve noise JCM800 2203 ghost Ghostnotes notes New Filter Trouble Overdrive

asked 15 Jul 2018 at 03:57 PM

Jopa Travassos
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1

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266

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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/

Valve buzzing buzz noise DSL20HR Problem help rattle

asked 09 Jul 2018 at 06:08 PM

Rory Judge
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Hi, i have just aquired a haze 15 head in great nick.

please anybody could you advise on what marshal power tubes are used as in maker ?

Also they use three ecc83 the first being a different code ( this is the one with the aluminium cover) is this the higher gain one? if so could i swap for a lower gain with no problems.

Also has anyone upgraded the speaker that is fitted ( marque) ? if so to what just interested

Thanks John

Speaker Tubes

asked 07 Jul 2018 at 12:29 PM

John Smith
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1

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102

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I have had my DSL40 for about 5 years now.  Today I turned it on and have zero gain.  The volume seems to work but no distortion, even on ultra gain.  I am assuming this means the tubes need to be replaced, but the poerp or preamp tubes?  Or all of them?

Tubes

asked 06 Jul 2018 at 04:27 AM

Doug Dickinson
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102

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I have an Axe Trak insulated speaker (here is a link to info on the speaker) www.axetrak.com/guitarmanual.pdf

When I have run it from the Marshall it has cut out after playing for a while, I have turned off the amp and then the following day used the amp with its built in 12" speaker and it has been fine. When i read the JTM 60 manual it said it is fine to drive a 8ohm from the external speaker output ONLY, not the internal out connection.

Is this OK? when things cut out it makes me worry about my Marshall and I really don't want to cause it any damage.... Also I have checked the speaker lead and that is all good, when it cut out it the sound broke up and faded in about 1 second. It is the 2nd time is has happened so i thought I best get some advice. The Axe Trak is great and means i can play a valve amp and get valve amp tone and not disturb my neighbours, it is a great bit of kit for home recording and I want/need to be able to use it. Any advice?

Thanks, Robin..

Valve Speaker Manual 8ohm 4ohm Problem

edited 16 Jun 2018 at 12:48 AM

Robin Brown

asked 16 Jun 2018 at 12:36 AM

Robin Brown
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1

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214

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Hey, 

So this is my first personal all valve amp. Ive had a few around but never one of my own, i know how to use them and what not to do, but ive never owned/played one long enough day to day to realise if the tubes are not properly working. 

The other day, i turned on my amp (It's a 110 volt made for USA mini jubilee head that i run through a transformer at 230 volts mains) as usual, and after i let it be on standby for about 10 minutes, when i turned it on, there was no sound. I proceeded to turn it back on standby and check all my cables in my signal chain on my board, and turned it on again (this happened a few times, maybe 4 or 5) and still no sound. 

I then checked the back because i do connect some pedals in the effects loop, and to my shock the speaker cable wasnt connected! (someone must have moved it around while cleaning and i never noticed as its on the back flush to a wall) 

I immediately turned the amp off. and then connected the speaker cable of my cab to the right speaker out, and after a few minutes, started up the amp, after giving it a good 10 minutes on standby. It worked! and the EQ was reacting normally, everything seemed fine. I had friends over so didnt really sit down and check in depth or notice anything off tone wise. Plus it was running on fairly low volume since it was late. 

It's been about 3 days, and i played yesterday, didnt notice anything odd. But today, i feel the overall volume the amp is giving out is really low compared to before. and i know this amps clean isnt really super clean with humbuckers but im feeling like its breaking up way too much and quickly as you turn up.  Could it be that i busted a power tube or pre amp tube? The amp is a year old and played fairly reglarly and gigged only 10 or so times. 

Any help, advice on the matter will be appreciated! Thank you in advance! 

 

Valve Speaker Tubes Mini jubilee head Issues

asked 28 May 2018 at 06:31 PM

Shashvat Pandit
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1

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123

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Hello...I purchased my JCM 800 (serial#02726N) back in the Fall of 1981. I pulled the rear plate off the head for the first time so I could install new tubes for the first time. I expected to find four EL84's, but was totally surprised to find 2 KT66's, and 2 6L6GC's instead. Is this normal? The amp sounded totally different from other Marshalls I was exposed to, now I know why. Did Marshall do this often, or did they just run out of specific tubes and slap in whatever they had on hand. It's kinda hard to believe they did that as the KT66's require an entirely different transformer than the EL34's. Any comments or logical explainations?? Thanks.

 

Tubes

asked 11 May 2018 at 07:12 PM

Randall Daggett
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