SM57/interface impedance question.

[Executioner213]

We (the_Drip and myself) are doing some reamping....we read somewhere that the recommended impedance of the SM57 is between 1.5k-2k ohms. We were looking into what the impedance of the M-Audio Profire 2626 (3.7k) and the Presonus FP10 (1.6k), which is what we have on hand...we also looked up the API 512c for reference (1.5k). The question is whether the Profire is technically causing a tonal difference in the sound of the 57? Is the impedance too high for a clear representation of what the SM57 is supposed to be giving?

(we're reamping with the Profire, not that it matters...)

 

[deLuther]

I`ve made one cable according to this article: http://www.recordingmag.com/resources/resourceDetail/330.html
Article suggests that low impedance (say 500-600 Ohm) is better for dynamic mic like SM57/58.
In my case difference was small, maybe because I change mic pre impedance from 1 kOhm to 600 Ohm using 1.5 kOhm resistor in parallel.

 

[barricade]

I like to record my 57 on 1.2kOhm through my Audient... if i switch it to 200 Ohm it get's to dark/lazy ... and in 5kOhm it's just too bright and hot!