It is saying that you need a trigger cable to turn the Vibelink on automatically when the preamp (e.g. ProPlus) turns on. I guess 'need' is too strong a word as you could always get up and manually switch the Vibelink on or off as required."The Wiim Vibelink Amp does not come with a remote control and does not support pairing with a remote. Both the first and second generation Wiim language remotes are compatible with the Wiim Pro Plus. The Vibelink and Pro Plus need to be connected via a cable, and you can use RCA, optical, or coaxial cables along with a trigger cable for the connection. It is not possible to use a single remote control to turn on both devices with just one button press. "
This doesnt sound right. Then why would you need a trigger cable between the two units?