Formula power forward this error screen to sharedip-10718034197. V comes from «voltage» and E from «electromotive force emf». E means also energy, so let’s choose V.
Some like better to stick to E instead to V, so do it. In sound engineering there is no Power matching or Impedance matching. This includes also the connection from the power amplifier to the speaker. Please enter two values, the third value will be calculated.