[Harp-L] shure 545 unidyne III

[Greg Heumann <greg@xxxxxxxxxxx>]

Hi, John-

 There were MANY different models of 545. The definitive source on  
the subject is http://www.angelfire.com/music/harmonica/shure545.html

In any case, though, you start by removing the connector. You can  
usually figure it out from there - and you can't hurt anything if you  
get it wrong. There is a screw that retains the connector in the  
barrel - unscrew it and pull the connector out. Usually, the red and  
blue wires are the low-z combination, connected to pins 2 and 3. The  
black and white wires are the high impedance set. With some 545's you  
pull the red wire socket off the back of the pin and move the white  
one there; some later 545's have a jumper on the back of pin 2 or 3;  
you simply move it to disconnect the red and connect the white to  
that pin. Then your hi-Z signal is on that pin and ground. Some Hi-Z  
cables are "pin 2 hot" and some are "pin 3 hot" so you'll need to  
make sure the configuration sends the white wire (hot) signal down  
the correct pin for your cable; pin 1 should always be ground.

/Greg

http://www.blowsmeaway.com
http://www.bluestateband.net



> From: John Hegedus <johnhegedus@xxxxxxx>
> Date: August 24, 2008 4:37:24 PM PDT
> To: harp-l@xxxxxxxxxx
> Subject: [Harp-L] shure 545 unidyne III
>
>
> How do I change from low impedance to high impedance on this mic? 
> ( shure 545 unidyne III ) Any info will help....... Thanks