I was recently gifted a Marshall Code 25 amp and i go to power it on (mind you i followed all of the intructions listed in the manual) and got no results. I tried a few different outlets thinking maybe my wall outlet was the problem but still got no power. 

Hi, after playing some JCM900's and 800's, I obtained a slightly battered JMP 2203, serial number 05027M.

This points to production year 1980.
Can anybody tell me the difference between the 1978, 1979 and 1980 incarnations of the JMP 2203?

And in addition; when relacing the valves, which types and brand should I use?

While we're at it... Where could I obtain the origonal schematics for my amp?

Thanks in advance!

Bye, Ward

I have  a nextbook tablet without bluetooth and i would like to know if the gateway app will also work with a USB connection? I do not have a cell phone to use with bluetooth.

Can someone explain how to write a setup in my Gateway library to the amp?  No matter which box I check I seem to always overwrite my Gateway library setup with what is on the amp instead of the other way around. 

Hello! 

I recently found out that my code 25 doesn't have a output that supports a jack. I've used a "Gibson Memory cable" before, and that was ok for my use. So my question is; which program should use when I connect my code amp to my computer? I'm not looking for an expensive and supergood program, just a program that works for my hobby playing :-) I hope this was understandable :-)

Hello Marshall. My Code 50 was connecting the other day and tonight I could not get it to connect. I am getting a message similar to this: Can only control an amp you are connected to. Something similar to this. Like my phone is connected to another Marshall Code. I only have one Code amp. My phone is connected to the amp in my bluethooth settings and I see the amp in the Gateway app. I have tried to forget the device and then find it again. Turning the app off and restarting it. Even uninstalling the app and reinstalling it. Still getting the same error message. Advice? Thanks.

-Brandon 

Hi, I just have a question...If and when it's time to replace the EL-34 Tubes in my head from them wearing out or I just want to try something different in an EL-34, What should the Bias be set to. I can't seem to find that info any place.  Thanks,

David A.Topp

Hi. Just wondering if there might be any plans or capabilities for post FX, maybe in a future firmware update? Using the delay, curruently it's not possible to set it for just one delay repeat. and have that repeat be at unity gain, or as loud as the source note. Also, we all know that true chorus FX sound SO much more lush in a post configuration. Thank you.

Hello,

which Pre Amp Model in an Code 50 amp comes closest to a Marshall Major 200W?

Regards,
Torben

Hello, i have a lot of problems for connecting with the CODE 25 via a Samsung smartphone, a while ago it worked fine. But the last couple of days the bluetooth is killing me.

So i already tried what i read on this forum,

Re install Gateway, delete the Code 25 from the bluetooth and try again.  When i put bleutooth on , i see the device on my smartphone, but it don't want to connect and on the screen of the CODE it says Bleutooth : VO............

It always say: Error, can not communicate with CODE VO.............

Can somebody help my please? 

Can I turn the 100 presets off on the CODE amp? I don't want a High gain setting or a looper setting or all of these weird settings I kind of want to just make my own setting, if you will.

I want it to be like a regular amp atm. Is that possible?

Hi all!

I want to change the MIDI-Channel from Channel #1 to Channel #16 on my JVM 215c.

Like in the manual described, I switched off the JVM, pressed and hold the MIDI-programm-switch and switched on the JVM. But when I release the MIDI-programm-switch, the LED did not start to flash and the amplifier did not detect any MIDI-message. From now on the amplifier detected no MIDI-message. Also not the MIDI-program-change-commands on Channel #1!

I had to do a factory reset and (of course) all MIDI-Presets were erased and the amplifier works again on MIDI-channel #1!

Do you know, which mistake I made?
Is there any other reset to do?
Is there any chance to solve this problem?

Thank you very much for your help!

Best wishes
Roland

Hi All,

Just bought the Code 25, amazing sounds but I cannot connect it with my iphone 6S. I updated the firmware installed it

and also restarted my phone. Nothing seemd to help. Yesyerday I have had a connection and today it seemed again not possible. tried many times.

Perhaps someone can advise me.

where is the seriel number on my dsl40c located?

Hi,
I find my Code 25 amp too loud at practice levels (at least for my apartment) so I have to set the Master Volume between 0.1-0.9 and in that  range the Master Volume varies greatly which makes almost impossible to adjust it at the same value twice.

It will be nice if the Master knob could also be set via software so it can be saved/stored and also displayed in the amp's front panel screen, since it is very common to move the amp from one room to another and accidentally change the Master setting without knowing at what level it was previously set.
Coud be possible to add this option in a future firmware/app update?

Thanks in advance!

Hello everybody I'm looking for Hotel California solo by Eagles tone thanks.

Dear Custom Service!

I am a happy user of Code 50.

The question is, relative to a normal high volume (master volume of 4 - 6, pre amp volume up 5 or more) of the amplifier resonates. What can it be? Normally this phenomenon, or a fault in the amplifier?

I look forward to your reply!

I'm actually a bass player who records at home, and I have to wear the hat of a guitar player when I do. I don't know enough about the intricacies of Marshall amplification to know what amp produces what? I mainly use a 12 string bass, so finding the right Marshall to produce the frequencies I need to sit right in the mix is trying, especially if you don't know what's what? I've been sticking to the workhorse setting of Rock..a Tele through a Plexi. But the sun don't rise, and set on a Plexi. I think I remember reading in a early review of the Code, that there was a Yngwie setting? If anyone knows how it's done...?

I want to change the source for playback (from samsun sound picker to google play).  Initially i had these two choices but now unable to access them.

looking for a Hendrix tone that's why I bought a Marshall amp. Yet not 1 of the 100 presets have anything Hendrixy to them. Disappointed.