document updated 17 years ago, on Sep 23, 2008
Audio baluns. WTF do they do? Some assertions:
- merely match impedance from the 75-ohm of RCA to the 100-ohm of cat5 (note: professional audio equipment is 600-ohm)
- merely an audio isolation transformer (intended to stop ground-loop problems), 1:1 transformer since they're so close?
Are adio isolation transformers always needed?