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Post subject: Mustang III amp controls mean what???
Posted: Tue Feb 15, 2011 2:18 pm
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Hello all.
What is "sag" and "bias" on the amp controls? what does it do? I have been messing with them and curious a technical explanation of what it is doing.

Also the "volume" knob, I understand the "master" knob is the overall volume of the amp but is the volume knob just controlling the volume of the preset itself? is it adding any distortion if turned up? I am used to a tube style where the gain/drive is pushing the preamp tubes and the volume is pushing the power tubes. thus giving two types of overdrive type sound. Is that what is being done here or is it just the volume of the specific preset?

does any of this make sense? :?


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Post subject: Re: Mustang III amp controls mean what???
Posted: Tue Feb 15, 2011 3:08 pm
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it makes sense. Alinux answered about sag and bias here: http://www.fender.com/community/forums/viewtopic.php?p=581659&sid=9fa6aee1607a69d6d50351fbd16aed97&sid=5aeea44ae4f8c5621deec6f4391eb3df#p581659

and regarding volumes...master volume controls overall amp volume, while gain and master control amount of gain :) more gain you open, more crunchy sound you get (as you already know)
use gain and volume to get the sound you want (I'm talking about clean/crunch sound now), and use master just to control overall volume coming from the amp.


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Post subject: Re: Mustang III amp controls mean what???
Posted: Tue Feb 15, 2011 6:13 pm
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Look at my reply to this posting for answers to the "knob" questions - the other's have been answered.

Look for my posting under "Gary Baker" responce. About 4 or 5 down from the top:


viewtopic.php?f=27&t=50988

Blessings, Bo


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Post subject: Re: Mustang III amp controls mean what???
Posted: Wed Feb 16, 2011 7:49 am
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Thanks for the replies. I always forget about the search function. I get a question and my mouth opens before I think it thru. Thanks for not flaming me about it :oops:

What a great idea with the bias. As soon as i saw the explanation, having tube amps, i was like, duh, bias, of course.....

thanks again


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