Impedance matching
In electronics, impedance matching is about connecting two electrical systems of which the impedances differ. Some audio devices use transformers for impedance matching. This is mainly used for tech systems in IT Departments
The concept of impedance matching is also used in optics, and roads.
Impedance Matching Media
Basic schematic for matching R1 to R2 with an L pad. R1 > R2, however, either R1 or R2 may be the source and the other the load. One of X1 or X2 must be an inductor and the other must be a capacitor.
L networks for narrowband matching a source or load impedance Z to a transmission line with characteristic impedance Z0. X and B may each be either positive (inductor) or negative (capacitor). If Z/Z0 is inside the 1+jx circle on the Smith chart (i.e. if Re(Z/Z0)>1), network (a) can be used; otherwise network (b) can be used.
Coaxial transmission line with one source and one load
Typical push–pull audio tube power amplifier, matched to loudspeaker with an impedance-matching transformer
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