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Dirty-South Blues Harp forum: wail on! > Converting a Shure 545SD Unidyne to Hi Z -- hard?
Converting a Shure 545SD Unidyne to Hi Z -- hard?
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Martin
1691 posts
Feb 29, 2024
12:26 PM
Shure has, on their homepage, instructions on how to do this, but I guess I would screw it up anyway -- so I have to ask a friend for assistance.
But I wonder, are the benefits of such an operation important?
I´ve never really come to terms with this HiZ/LoZ business (people have tried to explain it to me and I see their lips moving and I hear sounds but it just doesn´t land) and as far as I understand some fellars don´t give a damn and plug their Green Bullets straight in to the PA and just keep on smiling.
dougharps
2355 posts
Mar 04, 2024
6:35 AM
I have never owned this mic and never tried the conversion to high-z.

However, there is information on doing this on this page found via Google search:

545SD User Guide

Good luck!
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Doug S.
Martin
1692 posts
Mar 04, 2024
8:01 AM
Thank you Dougharps, I had noticed that, but am a bit too shy with screwdrivers and such to venture into close contact with electronics.
I have a conversion plug of sorts that gives me Hi z -- or is it Loz? -- but I tend to forget it.
Roy Ale
1 post
Mar 27, 2024
6:18 PM
Martin it sounds like you own a 545 mic . If you purchased it new then the instructions are in the box it came in . It is very easy to change the wires around too change the impedance . I have two 545 mics . i keep one wired to Low Z and one wired Hi Z . I label them HI Z and Low Z The advantage for me is if some how i loose one , i can get the other and change the impedance to match what i am plugging into . The 545 is the closest stick mic sound to a bullet . I prefer the feel of a stick mic in my hand . Advantage of the 545 is good price for a HI Z mic ( if wired HI Z ) . Another advantage is the on/ off switch, can lay the mic on stage any where , when it's off ! Disadvantage of the 545 is its a hot mic even wired low Z compared to the 57 . so low Z and into the board ( PA ) could still feed back in the PA. caution i have broken off the on /off switch when i put the mic in a mic stand holder . Sound Engineers like it when i do not have control of the volume .
To keep it simple for you could keep your 545 wired low Z , XLR to XLR into a low Z input into the PA . and if there are only Hi Z 1/4 inch inputs remaining on the PA or you want to plug into an amp ( HI Z ) then use the the impedance adaptor( XLR to 1/4 inch) . when i travel i only bring a Low z mic and an impedance adaptor .
Martin
1693 posts
Mar 28, 2024
7:37 AM
Roy Ale,
Thank you for this detailed reply! I´m more and more coming to the conclusion that it´s better to leave it be and use the impedance adaptor. (I -- literally! -- screw things up when I approach electronics.)
The on/off switch is an excellent little thing, and one wonders why more mics don´t have it.
Also with you on the general preference for stick mics!

Cheers /M
Roy Ale
2 posts
Mar 29, 2024
2:36 PM
Martin Another advantage for keeping your 545 Low Z , is cord length , Hi Z cords have a limit of 20 feet. Notice guitar players have a limit of 20 feet . When i use a Low Z mic I can use a 50 foot cord to play on a big stage . XLR to XLR into the PA and even when you plug into an amp or a Hi Z input in the PA with your impedance adaptor you can have a longer cord than 20 feet .


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