RJ-47's and audio

[Balijon]

Yes, they are not XLRs.

They can be, if you want to :

grT

 

[boji]

Mr. Roth: I dunno how well cat 5 works for a mic line that is carrying the low level signal...

0dbfs: NOT recommended for mic level signals though.

Would you mind briefly explaining your instincts on this?

Studiohub seems to say low-z would not be a problem:

most CAT-5 cables are rated at 100 ohms. This is fine because the AES
specification for AES/EBU impedance is +/- 20%, (or 88 to 120 ohms.)  Actually, it is the capacitance of
the cable, not the impedance, that has a much greater effect on digital and audio performance. And CAT-5
cables are all very low capacitance -  30 pf or lower. 

Audio circuits using CAT-5 cable are 600 ohms (or whatever the impedance is of the source equipment).
That’s because with any audio circuit the impedance is fully determined by the source and terminating gear
– not the wire. At audio frequencies, any cable would have to be over 2 miles  long (a quarter wavelength at
20 kHz) to have any effect on the impedance.