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  #1  
Old 10-24-2011, 06:04 PM
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Marshall - MB 4410 blowing out all pa desks

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I use a Marshall - MB 4410 combo amp, it was recommended to me by the local guitar shop as an amp that could handle small gigs and was on the cheeper end of good sounding amps it's not what I would call my ideal sound but it can get some good noise out of it. Perfect for small venues. My problem is every time we play a larger gig and I DI my amp out to the PA it completely overloads it with no way of getting the out of the red no matter what we try it always plays havoc with the sound guy at every gig and we end up sticking a mic on it rather than DI out. I was just wondering if anyone else has had this happen or if anyone could enlighten me as to why it's happening or even tell me how to fix it?

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Mariess.
  #2  
Old 10-24-2011, 06:15 PM
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I own a mb4410 too, and I have the same problem.
just use an external DI, Or a DI through which can handle the back DI socket! It only works at very low gain and volume.
So for live use, you better use an external DI or mic.
For recording you can adjust the levels, and use it together with a mic.
  #3  
Old 10-24-2011, 06:19 PM
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Try using the "active" input setting, and "pre" DI setting. Or use a Countryman Type 85 directly off your bass. If you're already doing that, I got nothin'!
  #4  
Old 10-24-2011, 06:19 PM
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sounds like it's just way too hot of a signal. if you have the schematic for it, you could easily mod the output of the DI with resistors to pad it's output.
  #5  
Old 10-24-2011, 06:22 PM
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My DI line out of my MB4210 always has a hiss (buzz)...so I just DI out of my Paradriver.
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  #6  
Old 10-24-2011, 06:50 PM
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A lot of built in amp DI's are affected by the amps volume controls, very often the pre gain, sometimes post gain too or just the "volume knob" if that's all you have. When you play bigger rooms you turn up more and thus send a hot signal to the board. Something I look for in a built in DI is a level adjustment. Amps that don't have one usually run a little hot. Most are still useable or at least tolerable, some aren't.

You can try setting it pre eq although your pre gain may still affect it. You can try running the input gain a little lower and making up for it with master volume, otherwise mod it, (would need johnk's help there) or run a separate di box between bass and amp so you can have your level, the desk can have theirs.

I run my amps DI post gain all the time when I run our bands sound from stage but I think it's just stupid to not have a level adjustment for the DI signal when the amps controls affect it.
  #7  
Old 10-24-2011, 07:36 PM
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Get an inline attenuate pad, goes inline with the XLR and you can drop by -10 to -20db.
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  #8  
Old 10-24-2011, 07:47 PM
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Quote:
Originally Posted by will33 View Post
A lot of built in amp DI's are affected by the amps volume controls, very often the pre gain, sometimes post gain too or just the "volume knob" if that's all you have. When you play bigger rooms you turn up more and thus send a hot signal to the board. Something I look for in a built in DI is a level adjustment. Amps that don't have one usually run a little hot. Most are still useable or at least tolerable, some aren't.

You can try setting it pre eq although your pre gain may still affect it. You can try running the input gain a little lower and making up for it with master volume, otherwise mod it, (would need johnk's help there) or run a separate di box between bass and amp so you can have your level, the desk can have theirs.

I run my amps DI post gain all the time when I run our bands sound from stage but I think it's just stupid to not have a level adjustment for the DI signal when the amps controls affect it.
+1. I would check your gain and EQ settings to start. The amp has a pre/post switch on the DI, but they both may be controlled by the input gain.
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  #9  
Old 10-24-2011, 07:48 PM
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yep, that would work too:



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  #10  
Old 10-24-2011, 07:50 PM
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From the manual:

Pre/Post - Selects the signal available at the Balanced line out. When in PRE position the buffered and level adjusted input signal is present at the DI output. The signal before the Master potentiometer is made available at this connector when in POST position.
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  #11  
Old 10-25-2011, 01:41 AM
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Quote:
Originally Posted by will33
A lot of built in amp DI's are affected by the amps volume controls, very often the pre gain, sometimes post gain too or just the "volume knob" if that's all you have. When you play bigger rooms you turn up more and thus send a hot signal to the board. Something I look for in a built in DI is a level adjustment. Amps that don't have one usually run a little hot. Most are still useable or at least tolerable, some aren't.

You can try setting it pre eq although your pre gain may still affect it. You can try running the input gain a little lower and making up for it with master volume, otherwise mod it, (would need johnk's help there) or run a separate di box between bass and amp so you can have your level, the desk can have theirs.

I run my amps DI post gain all the time when I run our bands sound from stage but I think it's just stupid to not have a level adjustment for the DI signal when the amps controls affect it.
Ive tried playing with gain and volume controls when we were recording our own demo, they don't seem to effect it, or if they did it wasnt noticeable enough to make it come out of overdrive fuzz mode on the mixer. I ended up using an old guitar pedal headphone out to get the sound to the mixer but it wasn't the sound I have set on my amp.

I'm not sure about using a DI box to go direct to the PA, I don't want to loose the sound I have set up.

Perhaps I should just invest in something like a Sans amp bbdi to set my sound on and just use my marshal as a cab?
  #12  
Old 10-25-2011, 02:31 AM
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the controls shouldn't effect it unless you switch the DI switch to pre instead of post. did you try it with this pushbutton switch in the 'out' position?

  #13  
Old 10-25-2011, 03:45 AM
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Quote:
Originally Posted by johnk_10
the controls shouldn't effect it unless you switch the DI switch to pre instead of post. did you try it with this pushbutton switch in the 'out' position?
Tried it every which way there is!
  #14  
Old 10-25-2011, 07:45 AM
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Quote:
Originally Posted by mariess View Post

I'm not sure about using a DI box to go direct to the PA, I don't want to loose the sound I have set up.
At least half of what you're hearing tone wise is created by the speaker anyway, so there's no reason not to use a DI. If you really want to have the same sound that you hear in the PA then you need a mic and an FOH engineer with a clue.
  #15  
Old 10-25-2011, 08:28 AM
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What effects are you using? Try adjusting the gain on those if you can. Maybe they are inducing the hot signal.
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  #16  
Old 10-25-2011, 09:30 AM
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My understanding of the Marshall DI line is:

in the PRE setting - the sound that is sent is the input from that guitar. None of the settings from the amp is sent.

And in the POST - the settings are sent (the EQ, Gain, etc), but the MASTER knob has no effect on what is sent. (The GAIN does only if you are using the Classic Channel).
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  #17  
Old 10-25-2011, 09:42 AM
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Quote:
Originally Posted by mariess View Post
... My problem is every time we play a larger gig and I DI my amp out to the PA it completely overloads it with no way of getting the out of the red no matter what we try...
I'm having a hard time believing this. You're telling us the bass still overloads the PA with the channel fader at ZERO?? First off, the DI out is almost certainly "line level" as opposed to "mic level" signal, but even so, the SOUND MAN should be able to reduce the input gain on his mixer, obviously with the channel fader but also many mixers have have a selectable gain on the input channel or a "pad" pot to adjust the gain separately from the fader. On most mixers, the pad control is the topmost knob on the channel.

Sorry, but this sounds like the soundguy's problem and not yours. That, or something is really screwed up with your DI output, and that seems unlikely.
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  #18  
Old 10-25-2011, 10:24 AM
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Originally Posted by B-string View Post
Get an inline attenuate pad, goes inline with the XLR and you can drop by -10 to -20db.
Yep that's the simplest way to do it!
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