Explain to me the XLR Cable!

Messages
343
Hey guys!

So I'm planning a little project, and I need to understand the anatomy of the XLR cable. Been doing a lot of research, and I've got most of it down, but no where can I find a simple explanation of what flows through what pins.

Where does the Signal Flow (electric guitars that use Piezo for example?)
Where does the phantom power flow?
Ground?

Which pin is usually designated to what?

Appreciate it!

Eric
 

DC1

Member
Messages
15,413
Are you speaking of an XLR used with a particular guitar, or one attached to a mic?

dc
 
Messages
343
I've read the wikipedia article before posting here...maybe I'm losing it, but it still doesn't differentiate between which pins the signal and voltage flow through. Anyone that can shed some light on it for me?

Thanks for the help.
 

Miles19

Member
Messages
62
XLRs are most commonly used for balanced signals (two signal wires, plus a separate ground). As the wikipedia article says, pin 1 is ground, and pins 2 and 3 are the signal "hot" and "return". Phantom power is typically +48V (though it can be other values), applied to BOTH pins 2 and 3, with respect to pin 1. Since the receiver of a balanced signal amplifies the difference between pins 2 and 3, the phantom power *should* have no effect on that amplifier, or on the balanced source that supplies the signal. However, there are some possible side-effects which can be hazardous to, for instance, ribbon mics.

HTH,
Miles
 




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