What is the FDD button located far right between

Fx level & CD input ? What is it's purpose? Thank you!

So...just got my new code 25 the other day and bluetooth hooked up great....played a couple of days and no problems....Tonight..cant get it to hook up.  Any ideas?...Can I ultimatley just hook up USB to my computer and adjust fromt there?

Trying to find out when my Red series Marshall Super Lead serial # 08256H was manufactured.

Hi there, currently using the marshall vba400 with the vbc412. Just purchased the DOD meatbox reissue and I was wondering what the frequency response is on the custom 12' speakers as I dont want to overload them with more low frequency than they can handle. 

Cheers,
Matt

P.s the cab is from 1999 if that helps at all.

When I try to install the firmware software I get an error saying Cannot start application. Application cannot be started. Contact the application vendor. I am running windows 10.  Any suggestions would be greatly appeaciated. 

Hello, I' m from Finland. Can you please tell me how many amps of these are made?  White label in the chassis shows "DARKNESS" , proto 1 , Serial number and EXAMPLE  # ?

In the power amp eq (gain, bass, mid, treb) control knobs do not work. Only the volume knob works. On the pre amp section, all eq  control knobs are working normally.

Is it normal  ?

While attempting to install the firmware update utility for my Code50, I continue to receive an error.  Are there any current issues with the the utility?  Perhaps the problem is on my end?  Please advise.  Thank you.

HOW CAN I DOWNLOAD THE FULL USER MANUAL FOR THE AMP AND FOOTSWITCH?

I just got a Marshall TSL 60 head and am having trouble with the footswitch.

Of the five buttons: Clean - Crunch - Lead - Reverb* - FX Loop*

The Reverb and FX Loop are both latching switches and work fine. The Clean, Crunch and Lead switches are all momentary and there's some sort of digital logic switching going on on the board. The problem is with these switches.

When I turn the amp on, the Clean switch LED comes on. When I hit the crunch or lead switch, nothing happens (No LED, no change from clean).

I thought it was an issue with the switches, so I replaced them. Now Crunch and Lead still do nothing, but when I hold down the Clean it switches to Overdrive for as long as I am holding the switch. When I let go, it goes back to clean.

Anyone have any thoughts why the switches aren't doing their job? Could it be a fried transistor that's supposed to be controlling the logic switching that's going on (Anyone know a good way to test this?). Some more info on the footswitch...

[Schematic](http://music-electronics-forum.com/attachments/34024d1432077935-tsl-20footswitch_page_2.jpg)

[DIN Pin Guide](http://i81.photobucket.com/albums/j202/paperboy38375/Forum Pics/tsl100switchinginfo.gif)

[Board Pic](http://i91.photobucket.com/albums/k288/fixr1984/DSCF0946.jpg)

[Another Board Pic](http://i281.photobucket.com/albums/kk224/chrisdrane/TSLInternal_zps056b5334.jpeg)

Any plans to release a Windows desktop app for managing presets via USB connection? I'm not an Android or iPhone user. Editing via amp panel is ok, but somewhat tedious. 

Hello,

I experienced the following situation when testing my brand new CODE 50:
When I pressed the "SAVE" button for quick saving a preset, the CODE 50 completely "froze" and no sound was coming out of it... 
Then, I turn off and on the unit and everything worked again with no problems.

This happened ONCE.

After this incident (some hours after), I reinstall the firmware and did a factory reset to the CODE.
After that, the issue has not happended again.  

It really sounds as a software "bug".
Is that a known issue?
I am gently asking in order to see what to do. 
Should I return the amp to the store I got it and ask for a replacement?

If the issue is software related, a replacement might not needed, since this may be fixed with a possible update...?

Thanks.

Denis

This seems to be a common problem with the code 50 and even the code 25? When i had my code 50 it would lockup with no sound from the amp when i edited and then tried to save a preset,i would have to shut off and then reboot the amp for it to work again,this happened about 3 out of 5 times when i used the amp?Check out the user reviews on musicians friend for the code 50,three reviews mention the same problem that i had with my code 50.

Marshall should look into this problem and try to fix it with a firmware update or find some other way to fix this problem?If marshall can fix it i would most likely buy this amp again.

Hi, I have a JCM-800 all original and assume is 2013 made, the serial number is M-2013-05-0216-1, I like to know what brand and kind of transformer was installed in this specific amp, and if is able to support kt-88´s tubes?

Kindly let me know as to whether any differences in the amount of gain

between ASTORIA Dual and 1959HW when those are fully cranked up?

1959HW is much heavy in gain when overdiven? Thank you.

Recently, I have purchased thru Andertons Music U.K, for a stack of

ASTORIA Dual head and matchinf 1x12 cabinet.

M-2015-52-0008-1-112 and M-2015-43-0205-0  respective S/N

However, in the Registration column,you have not provided the amp model yet. 

Slow hand did you go since almost more than year has passed away from the launching

of the amplfier ASTORIA series and matching cabintes. please clarify.

I may be doing something wrong. However all the sittings ive tried all sounds muddy/ muffeled. I play alot of metal music and it just sounds a bit off. Could someone possinly help me? 

Hello,
I was just wondering if anyone could please direct me to the tech specs for the Marshall 35th anniversary Bluesbreaker? I am having trouble finding the exact info. 

regards  
Kieran

is there any chance of adding to the website where you can find a specific sound setting. like one that sounds like judas priest  and led zeppelin and many others rather than sit in front of the amp for hours trying to figure it out...thanks

I purchased a Marshall Code 25 Watt amp today, and I am trying to connect it to my phone (Samsung s6 Edge+) via bluetooth, however, my phone will not discover it when scanning for available bluetooth devices. I have reset my phone and cycled the amp, and the problem persists. Are there any known issues with these devices or any workaround that I should look into?