Unloaded voltage divider
|Rule of thumb: The voltages are proportional to the resistances.
|This is an unloaded voltage divider with the four values of the input voltage V0,
the output voltage V2, and the divider resistors R1 and R2. Any three values can
be entered into the calculator. The fourth value will then be calculated.
|Calculator: Voltage divider with load (potentiometer)
Connecting an interface with Zout and Zin as impedance
|Z2 = (α × Z1) / (1 − α)
dB (level) = 20 × log α
Vout = Vin × [Z2 / (Z1 + Z2)]
Voltage divider, loaded or unloaded
In sound engineering there is no Power matching or Impedance matching.
In audio we use only Voltage bridging or high Impedance bridging.