First I need to say, I'm not a signer and neither a guitar player.
This is a preamp test done with one of the most common mic the Shure SM57. Tests include the Universal Audio La610 and 710, the Focusrite ISA and the interface Focusrite Liquid Saffire 56
Althought the sm57 is not the ideal mic for acoustic guitar, I thought using an affordable mic that most studio has was a good idea.
You get vocal tracks with each preamps then guitar with each preamps and also a combination with a tinny bit of reverb. NO EQ, NO COMP on ANY tracks

Access the page for all files
[MEDIA=soundcloud]pcrecord/sets/preamp-tests-with-sm57[/MEDIA]

This is solely to help those interested in those preamps. Questions are welcome !