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Ebay mark7777_1
Ebay mark7777_1
To answer your particular question, an SM57 gives out a balanced mic level signal. Using a quarter inch Jack with one ring , simply removes one side of the signal, it’s still at mic level although due to having one side of the signal removed is more prone to interference. Putting a Di box after the quarter inch one ring Jack cannot reproduce the signal that isn’t there in the first place.
*EDIT having said that those pre amp boxes only have an XLR input which wouldn't be much use if its an xlr - 1/4" cable
My main issue is when I want to use acoustic guitar mic’d up with an Sm57 there’s nowhere to plug it into with an xlr unless I get an external pre amp for it like you said.
For some reason when I use 2 separate inputs into the Focusrite it only comes out of one speaker side so might be something to do with stereo or mono output on the software control of the Focusrite.
https://www.gear4music.com/PA-DJ-and-Lighting/Shure-A85F-Line-matching-Transformer/33MC?origin=product-ads&gclid=EAIaIQobChMI-7qtjviW8QIV2trVCh1ftw_DEAQYASABEgL-IfD_BwE
looks like its meant to boost gain into a line input from xlr.
Balanced connections on short runs aren't really necessary for the most part ..... in fact in some cases a short unbalanced signal chain will be less noisy than a balanced one because total noise = circuit noise and noise picked up from cable and a differential opamp input circuit like the design in the Alto is noisier in design than a singled ended opamp circuit.
Any more than a couple of metres though an electrically noisy environment though and balanced will win out.
The amount of gain needed on the desk depends entirely on the output of the mic's transformer and this depends entirely on the sound pressure level and how near it is to the source. Put it near a drum and almost no gain will be needed, for a soft spoken vocal quite a bit of gain, maybe 30 to 40dB
"Reverse" meaning running it the 'wrong' way round so its the line input first? What sort of cables would I need from the SM57 then?