Hi there everyone, it's my first post here. I just acquired (2nd hand) Marshall VBA400 Bass head amplifier. It sounds really great but I just want to ask anyone from here has got the same experienced with an audible "humming sound" when the Standby Switch is turned ON... is it normal for this model? one more question, when i got the VBA400 it comes with Marshall MG412A speaker cabinet (4x12")... are they both match to use technically? 

I have recently been given the above amp and before I connect it to a speaker and switch it on I am concerned to know the correct protocol for connecting a speaker cabinet(s).  The speaker output sockets have no information directly next to them but a label elsewhere on the rear of the amp states "WARNING. Not to be used with speaker cabinets of less than 4 ohms"

My queries are:-

1. Is it safe (i.e. without risk of damage to the amp) to use just one speaker output as long as it is connected to a speaker cabinet of 4 ohms minimum impedance and appropriate wattage?

2. When using both speaker outputs can they both be connected to cabinets each of 4 ohms minimum impedance or are the outputs paralleled in which case would I need to work with two cabinets each of 8 ohms to arrive at a 4 ohms minimum impedance in total?

Apologies if the answer to this seems obvious but I have a little knowledge of these matters and while a little knowledge can be 'a dangerous thing' it can also lead you to be concerned (possibly unnecessarily) about getting things right!

Thanks in anticipation

Hello, I recently purchased a used Marshall Amp /HalfStack model 8100 ValveState 100 watt head with a model MG412 , A  Cabinet. the amps out put is 100watts RMS /4 ohm and the cabinet is 120watts RMS /8 ohm is this a problem ?

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.

hi there,

i'm pretty new to the whole cabinet with heads mixing and matching, i have only used combo's before and i am wondering about the power output of the code 100H which should be 100 watts if i am correct but the 412 cabinet is rated at 200 watts? so are you kind of limited as to what the cabinet can do or how does the whole power rating work? i ordered the 100H and 412 cab but i just want to be sure i'm not missing out on something bcs the power rating isn't correct

thanks guys!

Does this service exist ?

I am looking for a 2 x 12 guitar cabinet in standard black grain tolez with 'bluesbreaker cloth'.

Hi - my first post - hoping someone can help me. 

I have a 1998 DSL100 along with a 1960A and a 1936 cabinet.  Typically I use one cab or the other, but I'd like to try using both cabs, but am not sure about matching the impedance. 

The DSL head has the 3 outputs - 1 dedicated to 16 ohm and 2 that can do either 4 or 8 ohms along with the 4/8 switch.

The 1960A cab can do either 4 or 16 ohms in mono, or 8 ohms in stereo.

The 1936 cab can do either 8 ohms in mono or 16 ohms in stereo.

It doesn't look to me like I can use both cabs at the same time, but maybe I'm not completely understanding it.  Is there a way to hook up both cabs to head??

The right hand input on the 1960A says it's 16 ohm mono or 8 stereo, whereas the 1936 is the opposite and is 8 ohm mono and 16 ohm stereo.  Can I go from the 4/8 outputs on the head to the right hand input on both cabs - will this work without causing damage??  If I  can, do I set the DSL head to 4 or 8 ohms, and should the switch on the 1960A be mono or stereo?

Thanks - I appreciate your brain power lol!!

Phil

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

Hallo,

just received my DSL1HR now, and test it's functionality without an external cabinet (ordered but not arrived yet), so tested only with my headphones AKG K240 MKII. I noted that the volume is very low even with the volume knob at maximum level and switching the power 1W-0.1W I don't feel any difference, in both channel !

seems that only 0.1W is allowed when external speaker is disconnected. Is it broken or is it normal ? awaiting for a kind urgent fast responce please.

thanks

cheers

Roberto

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.

Are there any downloads for user Manuals for

Marshall Valvestate 100w Model 8100.

Marshall 1936 lead 2 x 12 Speaker Cabinet

Hi! I'm in the process of restore an empty 1x15 cabinet from 1973, model #2054! I'm trying to decide if I'm going to use it as guitar cab or a bass cab. If I decide for the Bass cabinet, due to its internal measures and specifications, what speaker do Marshall sugest?? I don't know if Back then The company's were preoccupied once studying the dimensions of the cabinets and eventual ports/reflexs versus speakers best performances .. but if so, what is the optimal bass speaker for this cabinet? 

Im going to try attach a photo of the refered model :)

check photo here: 

Any help is much appreciated!

thanks in advanced! 

Hello,
I just bought on ebay a 70's 2x12 Marshall Cabinet that I'm trying to identify the exact model on the internet but without success.. can you please help me? Using the speaker codes, I realized that is from 1977, but that's it...
Please see the attached photos ;) I'm sure that will be easy for you ;)
Thanks in advanced!

i want to know if there is a way to use a second cabinet with my 100h head and 4X12 cabinet so i can have a full stack vs. a half stack?

Hi,

I have a code 100H connected to a 4x12 cabinet.  I want to use my Boss ME-80, as I have stored a number of presets.  I have plugged my guitar into the ME-80 and the ME-80 into the input of the amp, however the volume of the amp is significantly decreased, I have turned the ME-80 volume up to max with little affect, I have also turned all the FX on The code 100H off.  The volume is very poor, worse with my Gibson SG, than with my Fender Strat. Is there a better way to set up my ME-80, e,g through the FX loop, and how would I do it.  Would this solve the problem?

Thanks

I researched 1x12 open back vs. closed back vs. ported cabinet guitar cabs. My experiment with my Code 50 amp was to remove the back without unplugging anything so I could here the difference between closed back and completely open back. The amp really came alive with a lot of punch and presence while ridding the boominess that occurs. I removed the power cord socket and cut a square the same size as the speaker. This was an improvement but I liked the complete open back sound better. I then cut the back out more leaving just enough stock to support the existing power cord socket hole and protect the electronics inside the cabinet. I will continue with cosmetics such as painting inside black and/or add a grate for protection. To my ears the amp really came to life open back. I will keep it this way. It is an easy experiment to try without sacrificing anything, just remove the back cover screws and pull the back away. If you hate it you just refasten it and leave it original.

.

I'm running a Code 100h head through MG 4x12 cabinet. This set up is load at home, but a band rehearsal I can hardly be heard above the drums and bass. 

That's with the patch volumes on 8-9 and master volume around 8-9 also.

Do I need to look at noise gate settings, presence, resonance etc or just put an EQ pedal in front of it?

I've heard others say that they gig regularly with the Code 100 without any issues.

Thanks.

Hi there,

here is a cabinet our lead player appeared with today at our practice room. He bought this in the 70's and has only replaced the cloth on it due to unwanted cat attention! Any idea how I might get the wattage and impedence from the serial number as he intends to run his Victory VX Kraken through it when it arrives! Personally I think it would be like taking an E-Type Jaguar for a spin in a ploughed field!!

Many thanks.

I have a 16 Ohm Orange Cabinet. Isit posible to connect it with teh Marshall Code (8Ohm) without causing damage?

CAN I ADD ANOTHER SPEAKER CABINET TO THE CODE 50

I WOULD LIKE BOTH CABINETS TO PRODUCE SOUND

MAYBE THROUGH THE USB   OR A  PORT OUT  OR A WIFI CONNECTION

ANY IDEAS

THX