[sdiy] [OT] first steps with audio transformers

[Michael Zacherl.]

Hello,

    I'm about to do my first steps with audio transformers and the more I read the more I  become uncertain about many points. :-(

First application will be an analogue input/output and monitoring stage for some laptops (different brands) in order to interface with a synth and/or mixer.

Admittedly I'm not sure about impedance, dc-resistance and if it's feasible to connect windings.

Looking at a data sheet overview like this 
http://docs-europe.origin.electrocomponents.com/webdocs/008d/0900766b8008d64a.pdf

I find this one pretty attractive (also moneywise)
http://docs-europe.electrocomponents.com/webdocs/00bb/0900766b800bbc2c.pdf

How to handle this low dc-resistance?
Could I connect the primary windings?
Input impedance appears to be pretty low as well, bad?

Thanks a lot, Michael. 

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