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Post subject: Mustang III XLR out
Posted: Fri Aug 25, 2017 7:46 am
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The Mustang III has two XLR outputs. Is one of them a mono out or is it necessary to use both?

Thanks


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Post subject: Re: Mustang III XLR out
Posted: Fri Sep 08, 2017 4:06 pm
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Neither of the Mustang XLRs are mono. So you get one side of the stereo if you use one. But that's what most folks do, just use one. I however being somewhat anal and not wanting to lose anything purchased a XLR "Y", that that plugs into both XLRs and joins them into one output. It seems to work fine, but probably not a truly noticeable difference.


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Post subject: Re: Mustang III XLR out
Posted: Sat Sep 23, 2017 10:04 am
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Use the L bal out for mono. Do not join them directly together with a Y cable because the L and R will have different voltage potentials depending on the phase and amplitude of the different L and R signals. It will be like shorting different phases directly together.
If you want L and R in mono, run them to a mixer first. Or build a small mixer circuit (a few resistors and capacitors) that will allow mixing the signals safely.
However IMHO, L mono alone will sound better than mixing L and R to mono. There will be phase cancellations when combining L and R to mono. Effects may sound less intense.
Take stereo delay for example. At any given moment, L will have an amplitude of the delay while R will have near zero. Then, next moment in time, they switch..The signal will be higher on R when L is near zero.
Signal level = voltage. Don't short 2 different signal voltages (or opposite phases) directly together. Signals will cancel.
The bal out line drivers may have protection, but a mixer will ensure it will not damage the outputs.
IMHO best to use stereo amps for true L and R. Otherwise use L for mono.


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Post subject: Re: Mustang III XLR out
Posted: Thu Sep 28, 2017 9:21 pm
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laman, if you are still there I have a question...

So I understand your theory that joining the two XLRs mashes the phasing of stereo effects together, but isn't that the same signal that goes to the one speaker of a Mustang III? For example a ping pong delay will have both sides of the stereo joined into mono when it goes to the single speaker and you will hear both pings out of the same speaker. If you send only one XLR through a board only one side of the stereo will go through the PA and it will not sound the same as the mono signal sent through the speaker. Mustang left XLR is just the left side of the stereo not mono like some other pieces of equipment. (see other posts in this forum on the subject).

BTW I do not use the stereo delays for this very reason... the repeats will be off when mashed into mono through the speaker. I use mono headphones to adjust the modulations (phaser, flanger) to adjust the tap rates to make sure they sound right in a mono environment.

Anyway I was just curious on your theory.


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