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Post subject: Re: Quick question on Mustang III
Posted: Thu Aug 30, 2012 1:16 pm
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very good troubleshooting skills you have there. Yeah, that's odd.

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Post subject: Re: Quick question on Mustang III
Posted: Thu Aug 30, 2012 1:32 pm
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greenstarthree wrote:
OK - I've done a few tests plugging things into other things and have noticed something strange:

For simplicity's sake, I plugged straight into the amp. No pedals involved
Then I ran a cable from the PHONES jack, into the Line input on my Yamaha Mixer. The mixer then goes to some studio monitors and some headphones.
This performed as you'd expect, amp models sounded fine, but mutes the amp speaker.

Then I tried running the cable from the FX send to the line input of the mixer. This kept the amp speaker live, but the sound through the mixer was bad, even using the amp's built in models.
For example using the "Basic 90s Stack" preset, coming from the FX send, I get a harsh, "scratchy" (it's hard to describe but VERY different from the preset) sound. The same kind of sound I got when I used my own OD pedal.

But, if I go from FX send to mixer, then plug a lead into the PHONES jack on the amp (just a lead, not connected to anything), there's a quick pause in the sound, then it changes to how the amp model should sound....!?
Basically, the sound from FX send changes depending on whether something's plugged into PHONES.

Can anyone explain what goes on inside the amp when something's plugged into PHONES?




Just a couple more things I've just noticed:

With the FX send going to mixer and nothing in PHONES (the bad sound), changing to different cabs (and the other settings in "advanced amp" does change the sound, but nowhere near the "real" cab sim sounds.

Also, there's a significant change in volume (so far always a decrease) when I plug something into PHONES. Though the Master Volume dial still does not affect the volume coming out of FX send, whether something is in PHONES or not.

Still confused! Though for strings10927 , at least this means you could use the FX send as a line out, leave something like a jack converter in PHONES, and not be frightened of breaking the 1/8" jack.....?


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Post subject: Re: Quick question on Mustang III
Posted: Thu Aug 30, 2012 4:19 pm
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Hi Adam,

So, at this point I would suggest that you may want to contact us directly for some additional personalized support on this. It sounds like you may need to do some fine tuning with your setup. I think we should be able to help you get it sorted out.

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Post subject: Re: Quick question on Mustang III
Posted: Fri Aug 31, 2012 1:03 am
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Professional Musician
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I can understand entirely Fender taking this sort of thing offline to resolve a specific problem someone's having without all the 'noise' of the forum. However, it would be really useful please if once the solution is found, for that to be posted back to the original thread in this forum. That way, anyone else with the same problem will know how to fix it and won't have to go through the whole rigmarole again. Just a suggestion...


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Post subject: Re: Quick question on Mustang III
Posted: Fri Aug 31, 2012 2:47 am
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Hi Scott, I agree,

I think it's great that Fender are willing to contact people personally for specific cases, it's brilliant from a customer service perspective. But yes, for the benefit of other people in future I'll post any progress here :)

Cheers
Adam


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Post subject: Re: Quick question on Mustang III
Posted: Fri Aug 31, 2012 9:36 am
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Sorry to post again, but I thought I'd record some clips since explaining the sound is so difficult! I tried a factory reset of the amp but no change. I hope the links work, I havent posted clips before so if I've done it wrong please let me know!

These were recorded with the guitar straight into the amp. Then the amp was run into a mixer (all EQs flat) from each output, then to my computer. There was no clipping on the mixer or computer in the recording, everything you hear is coming from the amp. The preset used is Basic 90s Stack with no modifications.

Here's the sound from the PHONES output, sounding as you'd expect:
FROMPHONES.wav


Here's the sound from the FX SEND, with nothing plugged into PHONES. Totally different sound, and quite nasty actually!
FROMFXSEND.wav


Lastly, here's the sound from FX SEND, with a jack adapter plugged into PHONES, sounding as it should again!
FROMFXSEND-PLUGINPHONES.wav

Thanks again
Adam


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Post subject: Re: Quick question on Mustang III
Posted: Fri Aug 31, 2012 10:37 am
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In case the WAV files in my last post won't work, here's them in MP3 format:

FROM PHONES OUTPUT:
FROMPHONES mp3.mp3


FROM FX SEND, NOTHING IN PHONES (BAD SOUND):
FROMFXSEND mp3.mp3


FROM FX SEND, JACK ADAPTER IN PHONES:
FROMFXSEND-PLUGINPHONES mp3.mp3


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Post subject: Re: Quick question on Mustang III
Posted: Sat Sep 01, 2012 4:03 am
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greenstarthree wrote:
OK - I've done a few tests plugging things into other things and have noticed something strange:
...
Can anyone explain what goes on inside the amp when something's plugged into PHONES?

Hi Adam,

It would seem that:
- speaker cabinet simulation occurs when you connect the headphones;
- but should not occur when using the internal speaker.

That might explain the difference in the sounds.

Stephen


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Post subject: Re: Quick question on Mustang III
Posted: Sat Sep 01, 2012 4:58 am
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Quote:
It would seem that:
- speaker cabinet simulation occurs when you connect the headphones;
- but should not occur when using the internal speaker.



I could see the reasoning there, because with nothing in PHONES, the amp assumes it doesnt have to use speaker cab sim because it thinks it's using it's own speaker?

But if that is the case, and Fender officially reccommend use of the FX send as a line out, wouldn't it make more sense to have this as an optional choice? Perahps in the UTIL menu, you could choose if you want the FX send to be Pre or Post speaker cab sim, depending on how it is used?
Or the other option is to be able to choose whether using the PHONES jack mutes the speaker or not?


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Post subject: Re: Quick question on Mustang III
Posted: Sat Sep 01, 2012 6:44 pm
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Hi Adam,

I have just send you an email. And to clarify here, Fender is happy to offer specific steps or solutions to specific issues. If becomes more difficult when there are a number of moving parts and multiple users are chiming in. In these situations we normally find it more effective to work closely with the primary user seeing the issue(s), and once things become more defined, we can post information on the Forum and/or add a Fender Knowledgebase article, etc. Additionally, we do not specifically recommend using the Effects send on the Fender Mustang III-V amps but rather suggest that for those who would like to have a line output function on these models that the Effects send is one way to go.

So, we are not in the office until Tuesday. But I will follow up with the appropriate engineer on this next week and we can go from there. I will be emailing you and then once we clarify this, I will come back and offer more clarified information for all. Thanks. Have a nice weekend all. :)

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Post subject: Re: Quick question on Mustang III
Posted: Sun Jan 05, 2014 4:18 am
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Before I purchase the Mustang III v2, can you mute the speakers while running XLR into the house board?

I know you can use the headphone jack to mute the amps speakers, but I want to use the XLR connections in stereo.

I am thinking that a crude way to do it is to physically disconnect the speaker from the amp. I am not sure you actually even need a load on the amp because it is not a tube amp. Solid state, I think can do it.

Does anyone have way to do this?

TJ


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Post subject: Re: Quick question on Mustang III
Posted: Sun Jan 05, 2014 5:16 pm
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Professional Musician
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Location: England
Quote:
can you mute the speakers while running XLR into the house board?


Yes, just turn the master volume to zero. The XLR out and the internal power amp / speaker have separate volume controls. See the schematic here:

http://support.fender.com/manuals/guita ... tsLoop.pdf

(nb this diagram was created to show a different aspect of the amp, namely the fx loop position, but it also conveniently shows the different signal paths for the XLR outputs and the power amp section)


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Post subject: Re: Quick question on Mustang III
Posted: Thu Feb 27, 2014 11:50 pm
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I just started following this thread. I have a similar concern as the OP.

What is the latest status ? How'd this turn out?
Thanks


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Post subject: Re: Quick question on Mustang III
Posted: Fri Apr 18, 2014 6:00 am
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Is there any update to this?


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Post subject: Re: Quick question on Mustang III
Posted: Fri Apr 18, 2014 8:14 am
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In the almost two years since the OP was having an issue, the Mustang III v2 was released with two XLR Line Outs. This should have totally solved the problem.


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