Using my new SC wireless system for sax.
which is better to use: in mic position
or line position
also, what is difference and/or preferred between using:
low-impedance XLR cable v. high-impedance 1/4" cable
It all depends on the input specifications of the audio mixer being fed by the SC receiver.
A line level signal is about 1,000 times greater than a mic level signal; 1 volt versus 0.001 volt. Putting a line level signal into an input looking for mic level will cause gross distortion. Check the input level specs of your mixer and set the SC mic/line switch accordingly.
A low impedance, balanced signal is typically sent on a cable that uses XLR connectors. This type of signal is very immune to outside interference and can be sent thousands of feet without signal loss. There are no advantages to using an unbalanced, high impedance connection. Only use the high impedance, 1/4" connection if you do not have an XLR low impedance connection.
To learn more, check out the sound reinforcement technical publications at the Publications page of www.shure.com.