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I have a marshall MG100HDFX/MG412 slant cab half stack. There seems to be something wrong with the head. It will not turn on. The redlight and the fan do not turn on. I have tried almost everything like replacing the power chord that goes into the outlet. Nothing has worked. I'm guessing that it is something internally. Any suggestions would be greatly appreciated. Thank you very much, Henry Kaye HBKaye@mac.com

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Have you opened it to check the fuse?

Posted on Nov 21, 2008

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Hi, I've a Marshall JVM410H which is connected to a Marshall 1960B cabinet. The problem is I can't take the volume up very much because there is so much distortion - the more I turn the volume up, the...


Hi-
It sounds like you have the same rig I do. I bought the JVM410h immediately after it came out. I'm a professional gigging musician, and it had the versatility I needed.
One of the first things I noticed was it's high gain structure. On my JCM800, I could crank the gain to 10, and get a great, "classic Marshall" overdrive tone. The gain structure of the JVM is more sensitive. I find myself not needing the gain knob any higher than 10 o'clock, in the RED modes of the OD channels.
The manual is very informative, though somewhat complex. I recommend watching this tutorial on it:
http://www.marshallamps.com/product.asp?productCode=JVM410H#
Click on the "THEATRE" link on the right.
I love my amp, but it's been in the shop twice already. Marshall's are known for being unreliable, and this is amp is in no way an exception. Be gentle with it! It's moody.
Best of luck, and I hope this helps!

Aug 25, 2010 | Audio & Video Receivers

1 Answer

Humming noise when amp is switched on, nothing pluged in, make - marshall g30r cd


(Maybe) Seems like a problem with the reverb.Try opening it up (while un-plugged.) and try cleaning it out and checking there isn't any loose conections.

Nov 22, 2008 | Audio & Video Receivers

4 Answers

SWA-4000 doesn't adquire signal of HT-TX500 Home Theather


I was having poor audio from the back speakers and didn't even know it; intermittently I'd hear them jump in volume, so myself being a little adventurous, decided to push the ID set button on the back, totally losing my ilnk... after digging and playing, I figured it out:
1.) Turn off the Head (main) Unit 2.) Power on the wireless receiver, being sure it is away from routers, other BT devices, etc. 3.) Push the "ID Set" button on the back of the wireless device and hold it until the lights on its front panel flash. 4.) Point the system's remote control at the Head Unit and punch in 0135.  Its light should turn from red to blue. 5.) Perform step 3 again. 6.) Power on the head unit.
Should link up.
Might be some redundancy there, but it works :)
Also I found that after a few cycles It seemed to work better (perhaps cycled to a better channel?)

Oct 06, 2008 | Samsung SWA-4000

1 Answer

I have a Holden Wasp XL base amp. 100 watt?? Quite old, 70's ish. CAn you tell me how many and what size speakers it will run. Thanks, Lance


hell yer, built in New Zealand... or Aussie, cant remember. Best sort of speaker box for bass is 4 x 10inch quad box. Next. a single 15 inch, or use both together. The head you have I think was more of a PA system than a bass amp, but will certainly do the job. So long as you are not trying to keep up with a Fender twin, or a Marshall stack. 100 watts don't go far for bass. I would go for the single 15 inch driver to more the most air.

regards
robotek

Jul 06, 2008 | Audio & Video Receivers

1 Answer

Marshall JCM2000 TSL601 Powers on but no sound


Hi scot4321

Most common cause of no sound is a blown fuse. Check both the fuses with a resistance checker if you have one, sometimes they may look good, but be faulty. If this is the case, you probably need to look for a reason why the fuse blew in the first place. Running a tube rig without a speaker connected is often the problem. the HT fuse will pop almost straight away. Another is using a signal lead instead of a speaker lead to connect your Speaker cab. Always use at least an 18 gauge speaker lead with decent connectors like Switchcraft or Neutrix. NOT a cheapo patch lead. A Failing tube will also commonly cause it to blow. If it happens again, then change the output tubes. If it is not the fuses, and you have experience with repairing valve amps, I suggest you take the head into a repair guy for a look.

I am more than happy to answer any other questions you may have about it, just give me a hoy :) If you still have problems, then before you give a rating for this advice, please get back to me and we can try some more things.
Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards
robotek




May 31, 2008 | Audio & Video Receivers

1 Answer

I have a marshall 100w JCM 2000, DSL 100 Head, going into a 1960 A 4x12 cabinet. Which inputs and settings should i use on the rear of the amp in order not to damage it


Most 1960 cabs have an option for 8 or 16 ohm... i dont think there is a 4 ohm option. The Jcm 2000 heads have the ability to do all three ohm setting. Thats all you really have to worry about. Make sure the ohms match up. The 1960 cabs typically have 4 t-75 speakers in them which are 75 watts each so wattage is not a problem. There is some argument about what ohms sound best. It doesn't really change that much in the sound in my personal opinion. I run mine at 16 ohms though cause i think it sounds brighter...

Apr 18, 2008 | Audio & Video Receivers

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